Batya Swift Yasgur

Teenagers who use cannabis have a dramatic increased risk for a psychotic disorder, compared with their counterparts who don’t use the drug, new research showed.

Investigators at the University of Toronto, The Centre for Addiction and Mental Health (CAMH), and the Institute for Clinical Evaluative Sciences (ICES), in Canada, linked recent population-based survey data from more than 11,000 youngsters to health service use records, including hospitalizations, emergency department (ED) visits, and outpatient visits.

“We found a very strong association between cannabis use and risk of psychotic disorder in adolescence [although] surprisingly, we didn’t find evidence of association in young adulthood,” lead author André J. McDonald, PhD, currently a postdoctoral fellow at the Peter Boris Centre for Addictions Research and the Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University, Hamilton, Ontario, Canada, said in a news release.

“These findings are consistent with the neurodevelopmental theory that teens are especially vulnerable to the effects of cannabis,” said Dr. McDonald, who conducted the research.

The study was published online in Psychological Medicine.


 

Increased Potency

“Epidemiologic research suggests that cannabis use may be a significant risk factor for psychotic disorders,” the authors wrote. However, methodological limitations of previous studies make it difficult to estimate the strength of association, with the current evidence base relying largely on cannabis use during the twentieth century, when the drug was “significantly less potent.” It’s plausible that the strength of association has increased due to increased cannabis potency.

The researchers believe youth cannabis use and psychotic disorders is “a critical public health issue,” especially as more jurisdictions liberalize cannabis use and the perception of harm declines among youth.

To estimate the association between cannabis use during youth and the risk for a psychotic disorder diagnosis, using recent population-based data, they used data from the 2009-2012 cycles of the Canadian Community Health Survey (CCHS) linked to administrative health data at ICES to study noninstitutionalized Ontario residents, aged 12-24 years, who had completed the CCHS during that period.

They excluded respondents who used health services for psychotic disorders during the 6 years prior to their CCHS interview date.

Respondents (n = 11,363; 51% men; mean age [SD], 18.3 [15.2-21.3] years) were followed for 6-9 years, with days to first hospitalization, ED visit, or outpatient visit related to a psychotic disorder as the primary outcome.

The researchers estimated age-specific hazard ratios during adolescence (12-19 years) and young adulthood (20-33 years) and conducted sensitivity analyses to explore alternative model conditions, including restricting the outcome to hospitalizations and ED visits, to increase specificity.

Compared with no cannabis use, cannabis use was significantly associated with an 11-fold increased risk for psychotic disorders during adolescence, although not during young adulthood (adjusted hazard ratio [aHR], 11.2; 95% CI, 4.6-27.3 and aHR, 1.3; 95% CI, 0.6-2.6, respectively).
 

Perception of Harm Declining

When the researchers restricted the outcome to hospitalizations and ED visits only, the strength of association “increased markedly” during adolescence, with a 26-fold higher association in cannabis users than in nonusers (aHR, 26.7; 95% CI, 7.7-92.8). However, there was no meaningful change during young adulthood (aHR, 1.8; 95% CI, 0.6-5.4).

“Many have hypothesized that adolescence is a more sensitive risk period than adulthood for the effect of cannabis use on psychotic disorder development, yet prior to this study, little epidemiologic evidence existed to support this view,” the authors wrote.

The data also suggest that cannabis use is “more strongly associated with more severe psychotic outcomes, as the strength of association during adolescence increased markedly when we restricted the outcome to hospitalizations and ED visits (the most severe types of health service use),” the investigators noted.

The authors noted several limitations. For instance, it’s unclear to what extent unmeasured confounders including genetic predisposition, family history of psychotic disorders, and trauma might have biased the results. In addition, they could not assess the potential confounding impact of genetic predisposition to psychotic disorders. The possibility of reverse causality also cannot be ruled out. It’s possible, they noted, that individuals with “psychotic dispositions” may self-medicate or show greater disposition to cannabis use.

Moreover, the dataset neither captured important factors regarding the cannabis itself, including delta-9-tetrahydrocannabinol potency, mode of use, product type, or cannabis dependence, nor captured institutionalized and homeless youth.

Nevertheless, they pointed to the findings as supporting a “precautionary principle” — as more jurisdictions move to liberalize cannabis use and perception of harm declines among youth, the findings suggest that evidence-based cannabis prevention strategies for adolescents are warranted.

This study was supported by CAMH, the University of Toronto, and ICES, which is funded by an annual grant from the Ontario Ministry of Health and the Ministry of Long-Term Care. The authors declared no relevant financial relationships.

A version of this article appeared on Medscape.com.

Teenagers who use cannabis have a dramatic increased risk for a psychotic disorder, compared with their counterparts who don’t use the drug, new research showed.

Investigators at the University of Toronto, The Centre for Addiction and Mental Health (CAMH), and the Institute for Clinical Evaluative Sciences (ICES), in Canada, linked recent population-based survey data from more than 11,000 youngsters to health service use records, including hospitalizations, emergency department (ED) visits, and outpatient visits.

“We found a very strong association between cannabis use and risk of psychotic disorder in adolescence [although] surprisingly, we didn’t find evidence of association in young adulthood,” lead author André J. McDonald, PhD, currently a postdoctoral fellow at the Peter Boris Centre for Addictions Research and the Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University, Hamilton, Ontario, Canada, said in a news release.

“These findings are consistent with the neurodevelopmental theory that teens are especially vulnerable to the effects of cannabis,” said Dr. McDonald, who conducted the research.

The study was published online in Psychological Medicine.


 

Increased Potency

“Epidemiologic research suggests that cannabis use may be a significant risk factor for psychotic disorders,” the authors wrote. However, methodological limitations of previous studies make it difficult to estimate the strength of association, with the current evidence base relying largely on cannabis use during the twentieth century, when the drug was “significantly less potent.” It’s plausible that the strength of association has increased due to increased cannabis potency.

The researchers believe youth cannabis use and psychotic disorders is “a critical public health issue,” especially as more jurisdictions liberalize cannabis use and the perception of harm declines among youth.

To estimate the association between cannabis use during youth and the risk for a psychotic disorder diagnosis, using recent population-based data, they used data from the 2009-2012 cycles of the Canadian Community Health Survey (CCHS) linked to administrative health data at ICES to study noninstitutionalized Ontario residents, aged 12-24 years, who had completed the CCHS during that period.

They excluded respondents who used health services for psychotic disorders during the 6 years prior to their CCHS interview date.

Respondents (n = 11,363; 51% men; mean age [SD], 18.3 [15.2-21.3] years) were followed for 6-9 years, with days to first hospitalization, ED visit, or outpatient visit related to a psychotic disorder as the primary outcome.

The researchers estimated age-specific hazard ratios during adolescence (12-19 years) and young adulthood (20-33 years) and conducted sensitivity analyses to explore alternative model conditions, including restricting the outcome to hospitalizations and ED visits, to increase specificity.

Compared with no cannabis use, cannabis use was significantly associated with an 11-fold increased risk for psychotic disorders during adolescence, although not during young adulthood (adjusted hazard ratio [aHR], 11.2; 95% CI, 4.6-27.3 and aHR, 1.3; 95% CI, 0.6-2.6, respectively).
 

Perception of Harm Declining

When the researchers restricted the outcome to hospitalizations and ED visits only, the strength of association “increased markedly” during adolescence, with a 26-fold higher association in cannabis users than in nonusers (aHR, 26.7; 95% CI, 7.7-92.8). However, there was no meaningful change during young adulthood (aHR, 1.8; 95% CI, 0.6-5.4).

“Many have hypothesized that adolescence is a more sensitive risk period than adulthood for the effect of cannabis use on psychotic disorder development, yet prior to this study, little epidemiologic evidence existed to support this view,” the authors wrote.

The data also suggest that cannabis use is “more strongly associated with more severe psychotic outcomes, as the strength of association during adolescence increased markedly when we restricted the outcome to hospitalizations and ED visits (the most severe types of health service use),” the investigators noted.

The authors noted several limitations. For instance, it’s unclear to what extent unmeasured confounders including genetic predisposition, family history of psychotic disorders, and trauma might have biased the results. In addition, they could not assess the potential confounding impact of genetic predisposition to psychotic disorders. The possibility of reverse causality also cannot be ruled out. It’s possible, they noted, that individuals with “psychotic dispositions” may self-medicate or show greater disposition to cannabis use.

Moreover, the dataset neither captured important factors regarding the cannabis itself, including delta-9-tetrahydrocannabinol potency, mode of use, product type, or cannabis dependence, nor captured institutionalized and homeless youth.

Nevertheless, they pointed to the findings as supporting a “precautionary principle” — as more jurisdictions move to liberalize cannabis use and perception of harm declines among youth, the findings suggest that evidence-based cannabis prevention strategies for adolescents are warranted.

This study was supported by CAMH, the University of Toronto, and ICES, which is funded by an annual grant from the Ontario Ministry of Health and the Ministry of Long-Term Care. The authors declared no relevant financial relationships.

A version of this article appeared on Medscape.com.

Teenagers who use cannabis have a dramatic increased risk for a psychotic disorder, compared with their counterparts who don’t use the drug, new research showed.

Investigators at the University of Toronto, The Centre for Addiction and Mental Health (CAMH), and the Institute for Clinical Evaluative Sciences (ICES), in Canada, linked recent population-based survey data from more than 11,000 youngsters to health service use records, including hospitalizations, emergency department (ED) visits, and outpatient visits.

“We found a very strong association between cannabis use and risk of psychotic disorder in adolescence [although] surprisingly, we didn’t find evidence of association in young adulthood,” lead author André J. McDonald, PhD, currently a postdoctoral fellow at the Peter Boris Centre for Addictions Research and the Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University, Hamilton, Ontario, Canada, said in a news release.

“These findings are consistent with the neurodevelopmental theory that teens are especially vulnerable to the effects of cannabis,” said Dr. McDonald, who conducted the research.

The study was published online in Psychological Medicine.


 

Increased Potency

“Epidemiologic research suggests that cannabis use may be a significant risk factor for psychotic disorders,” the authors wrote. However, methodological limitations of previous studies make it difficult to estimate the strength of association, with the current evidence base relying largely on cannabis use during the twentieth century, when the drug was “significantly less potent.” It’s plausible that the strength of association has increased due to increased cannabis potency.

The researchers believe youth cannabis use and psychotic disorders is “a critical public health issue,” especially as more jurisdictions liberalize cannabis use and the perception of harm declines among youth.

To estimate the association between cannabis use during youth and the risk for a psychotic disorder diagnosis, using recent population-based data, they used data from the 2009-2012 cycles of the Canadian Community Health Survey (CCHS) linked to administrative health data at ICES to study noninstitutionalized Ontario residents, aged 12-24 years, who had completed the CCHS during that period.

They excluded respondents who used health services for psychotic disorders during the 6 years prior to their CCHS interview date.

Respondents (n = 11,363; 51% men; mean age [SD], 18.3 [15.2-21.3] years) were followed for 6-9 years, with days to first hospitalization, ED visit, or outpatient visit related to a psychotic disorder as the primary outcome.

The researchers estimated age-specific hazard ratios during adolescence (12-19 years) and young adulthood (20-33 years) and conducted sensitivity analyses to explore alternative model conditions, including restricting the outcome to hospitalizations and ED visits, to increase specificity.

Compared with no cannabis use, cannabis use was significantly associated with an 11-fold increased risk for psychotic disorders during adolescence, although not during young adulthood (adjusted hazard ratio [aHR], 11.2; 95% CI, 4.6-27.3 and aHR, 1.3; 95% CI, 0.6-2.6, respectively).
 

Perception of Harm Declining

When the researchers restricted the outcome to hospitalizations and ED visits only, the strength of association “increased markedly” during adolescence, with a 26-fold higher association in cannabis users than in nonusers (aHR, 26.7; 95% CI, 7.7-92.8). However, there was no meaningful change during young adulthood (aHR, 1.8; 95% CI, 0.6-5.4).

“Many have hypothesized that adolescence is a more sensitive risk period than adulthood for the effect of cannabis use on psychotic disorder development, yet prior to this study, little epidemiologic evidence existed to support this view,” the authors wrote.

The data also suggest that cannabis use is “more strongly associated with more severe psychotic outcomes, as the strength of association during adolescence increased markedly when we restricted the outcome to hospitalizations and ED visits (the most severe types of health service use),” the investigators noted.

The authors noted several limitations. For instance, it’s unclear to what extent unmeasured confounders including genetic predisposition, family history of psychotic disorders, and trauma might have biased the results. In addition, they could not assess the potential confounding impact of genetic predisposition to psychotic disorders. The possibility of reverse causality also cannot be ruled out. It’s possible, they noted, that individuals with “psychotic dispositions” may self-medicate or show greater disposition to cannabis use.

Moreover, the dataset neither captured important factors regarding the cannabis itself, including delta-9-tetrahydrocannabinol potency, mode of use, product type, or cannabis dependence, nor captured institutionalized and homeless youth.

Nevertheless, they pointed to the findings as supporting a “precautionary principle” — as more jurisdictions move to liberalize cannabis use and perception of harm declines among youth, the findings suggest that evidence-based cannabis prevention strategies for adolescents are warranted.

This study was supported by CAMH, the University of Toronto, and ICES, which is funded by an annual grant from the Ontario Ministry of Health and the Ministry of Long-Term Care. The authors declared no relevant financial relationships.

A version of this article appeared on Medscape.com.

TOPLINE:

The number of suicides among US college students has doubled over the past two decades and is now the second-most common cause of death after accidents in this population, a new study by the National Collegiate Athletic Association (NCAA) found.

METHODOLOGY:

• Investigators analyzed deaths between 2002 and 2022, using Poisson regression models to assess changes in incidence rates over time.
• Data were drawn from the NCAA death database, which includes death from any cause, and included demographic characteristics such as age and race and sporting discipline.
• They utilized linear and quadratic fits between year and suicide incidence for men and women.
• Given the low incidence of suicide deaths per year, the incidence rate was multiplied by 100,000 to calculate the incidence per 100,000 athlete-years (AYs).
•  

TAKEAWAY:

• Of 1102 total deaths, 11.6% were due to suicide (98 men, 30 women).
• Athletes who died by suicide ranged in age from 17 to 24 years (mean, 20 years) were predominantly men (77%) and White (59%), with the highest suicide incidence rate among male cross-country athletes (1:29 per 815 AYs).
• The overall incidence of suicide was 1:71 per 145 AYs.
• Over the last 10 years, suicide was the second most common cause of death after accidents, with the proportion of deaths by suicide doubling from the first to the second decades (7.6% to 15.3%).
• Among men, the suicide incidence rate increased in a linear fashion (5-year incidence rate ratio, 1.32; 95% CI, 1.14-1.53), while among women, a quadratic association was identified (P = .002), with the incidence rate reaching its lowest point in women from 2010 to 2011 and increasing thereafter.

IN PRACTICE:

“Athletes are generally thought of as one of the healthiest populations in our society, yet the pressures of school, internal and external performance expectations, time demands, injury, athletic identity, and physical fatigue can lead to depression, mental health problems, and suicide,” the authors wrote. “Although the rate of suicide among collegiate athletes remains lower than the general population, it is important to recognize the parallel increase to ensure this population is not overlooked when assessing for risk factors and implementing prevention strategies.”

SOURCE:

Bridget M. Whelan, MPH, research scientist in the Department of Family Medicine, Sports Medicine Section, University of Washington School of Medicine, Seattle, was the lead and corresponding author on the study, which was published online in the British Journal of Sports Medicine.

LIMITATIONS:

There is no mandatory reporting system for athlete deaths in the United States, and investigators’ search identified 16 deaths with unknown causes, suggesting reported suicide incidence rates may be underestimated. Additionally, in cases of overdose that were not clearly intentional, the death was listed as “overdose,” possibly resulting in underreporting of suicide.

DISCLOSURES:

No source of study funding was listed. The authors disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

TOPLINE:

The number of suicides among US college students has doubled over the past two decades and is now the second-most common cause of death after accidents in this population, a new study by the National Collegiate Athletic Association (NCAA) found.

METHODOLOGY:

• Investigators analyzed deaths between 2002 and 2022, using Poisson regression models to assess changes in incidence rates over time.
• Data were drawn from the NCAA death database, which includes death from any cause, and included demographic characteristics such as age and race and sporting discipline.
• They utilized linear and quadratic fits between year and suicide incidence for men and women.
• Given the low incidence of suicide deaths per year, the incidence rate was multiplied by 100,000 to calculate the incidence per 100,000 athlete-years (AYs).
•  

TAKEAWAY:

• Of 1102 total deaths, 11.6% were due to suicide (98 men, 30 women).
• Athletes who died by suicide ranged in age from 17 to 24 years (mean, 20 years) were predominantly men (77%) and White (59%), with the highest suicide incidence rate among male cross-country athletes (1:29 per 815 AYs).
• The overall incidence of suicide was 1:71 per 145 AYs.
• Over the last 10 years, suicide was the second most common cause of death after accidents, with the proportion of deaths by suicide doubling from the first to the second decades (7.6% to 15.3%).
• Among men, the suicide incidence rate increased in a linear fashion (5-year incidence rate ratio, 1.32; 95% CI, 1.14-1.53), while among women, a quadratic association was identified (P = .002), with the incidence rate reaching its lowest point in women from 2010 to 2011 and increasing thereafter.

IN PRACTICE:

“Athletes are generally thought of as one of the healthiest populations in our society, yet the pressures of school, internal and external performance expectations, time demands, injury, athletic identity, and physical fatigue can lead to depression, mental health problems, and suicide,” the authors wrote. “Although the rate of suicide among collegiate athletes remains lower than the general population, it is important to recognize the parallel increase to ensure this population is not overlooked when assessing for risk factors and implementing prevention strategies.”

SOURCE:

Bridget M. Whelan, MPH, research scientist in the Department of Family Medicine, Sports Medicine Section, University of Washington School of Medicine, Seattle, was the lead and corresponding author on the study, which was published online in the British Journal of Sports Medicine.

LIMITATIONS:

There is no mandatory reporting system for athlete deaths in the United States, and investigators’ search identified 16 deaths with unknown causes, suggesting reported suicide incidence rates may be underestimated. Additionally, in cases of overdose that were not clearly intentional, the death was listed as “overdose,” possibly resulting in underreporting of suicide.

DISCLOSURES:

No source of study funding was listed. The authors disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

TOPLINE:

The number of suicides among US college students has doubled over the past two decades and is now the second-most common cause of death after accidents in this population, a new study by the National Collegiate Athletic Association (NCAA) found.

METHODOLOGY:

• Investigators analyzed deaths between 2002 and 2022, using Poisson regression models to assess changes in incidence rates over time.
• Data were drawn from the NCAA death database, which includes death from any cause, and included demographic characteristics such as age and race and sporting discipline.
• They utilized linear and quadratic fits between year and suicide incidence for men and women.
• Given the low incidence of suicide deaths per year, the incidence rate was multiplied by 100,000 to calculate the incidence per 100,000 athlete-years (AYs).
•  

TAKEAWAY:

• Of 1102 total deaths, 11.6% were due to suicide (98 men, 30 women).
• Athletes who died by suicide ranged in age from 17 to 24 years (mean, 20 years) were predominantly men (77%) and White (59%), with the highest suicide incidence rate among male cross-country athletes (1:29 per 815 AYs).
• The overall incidence of suicide was 1:71 per 145 AYs.
• Over the last 10 years, suicide was the second most common cause of death after accidents, with the proportion of deaths by suicide doubling from the first to the second decades (7.6% to 15.3%).
• Among men, the suicide incidence rate increased in a linear fashion (5-year incidence rate ratio, 1.32; 95% CI, 1.14-1.53), while among women, a quadratic association was identified (P = .002), with the incidence rate reaching its lowest point in women from 2010 to 2011 and increasing thereafter.

IN PRACTICE:

“Athletes are generally thought of as one of the healthiest populations in our society, yet the pressures of school, internal and external performance expectations, time demands, injury, athletic identity, and physical fatigue can lead to depression, mental health problems, and suicide,” the authors wrote. “Although the rate of suicide among collegiate athletes remains lower than the general population, it is important to recognize the parallel increase to ensure this population is not overlooked when assessing for risk factors and implementing prevention strategies.”

SOURCE:

Bridget M. Whelan, MPH, research scientist in the Department of Family Medicine, Sports Medicine Section, University of Washington School of Medicine, Seattle, was the lead and corresponding author on the study, which was published online in the British Journal of Sports Medicine.

LIMITATIONS:

There is no mandatory reporting system for athlete deaths in the United States, and investigators’ search identified 16 deaths with unknown causes, suggesting reported suicide incidence rates may be underestimated. Additionally, in cases of overdose that were not clearly intentional, the death was listed as “overdose,” possibly resulting in underreporting of suicide.

DISCLOSURES:

No source of study funding was listed. The authors disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

TOPLINE:

Antidepressants are not associated with an increased risk for dementia, accelerated cognitive decline, or atrophy of white and gray matter in adults with no signs of cognitive impairment, new research suggests.

METHODOLOGY:

• Investigators studied 5511 individuals (58% women; mean age, 71 years) from the Rotterdam study, an ongoing prospective population-based cohort study.
• Participants were free from dementia at baseline, and incident dementia was monitored from baseline until 2018 with repeated cognitive assessments using the Mini-Mental Status Examination (MMSE) and the Geriatric Mental Schedule, as well as MRIs.
• Information on participants’ antidepressant use was extracted from pharmacy records from 1992 until baseline (2002-2008).
• During a mean follow-up of 10 years, 12% of participants developed dementia.

TAKEAWAY:

• Overall, 17% of participants had used antidepressants during the roughly 10-year period prior to baseline, and 4.1% were still using antidepressants at baseline.
• Medication use at baseline was more common in women than in men (21% vs 18%), and use increased with age: From 2.1% in participants aged between 45 and 50 years to 4.5% in those older than 80 years.
• After adjustment for confounders, there was no association between antidepressant use and dementia risk (hazard ratio [HR], 1.14; 95% CI, 0.92-1.41), accelerated cognitive decline, or atrophy of white and gray matter.
• However, tricyclic antidepressant use was associated with increased dementia risk (HR, 1.36; 95% CI, 1.01-1.83) compared with the use of selective serotonin reuptake inhibitors (HR, 1.12; 95% CI, 0.81-1.54).

IN PRACTICE:

“Although prescription of antidepressant medication in older individuals, in particular those with some cognitive impairment, may have acute symptomatic anticholinergic effects that warrant consideration in clinical practice, our results show that long-term antidepressant use does not have lasting effects on cognition or brain health in older adults without indication of cognitive impairment,” the authors wrote.

SOURCE:

Frank J. Wolters, MD, of the Department of Epidemiology and the Department of Radiology and Nuclear Medicine and Alzheimer Center, Erasmus University Medical Center, Rotterdam, the Netherlands, was the senior author on this study that was published online in Alzheimer’s and Dementia.

LIMITATIONS:

Limitations included the concern that although exclusion of participants with MMSE < 26 at baseline prevented reversed causation (ie, antidepressant use in response to depression during the prodromal phase of dementia), it may have introduced selection bias by disregarding the effects of antidepressant use prior to baseline and excluding participants with lower education.

DISCLOSURES:

This study was conducted as part of the Netherlands Consortium of Dementia Cohorts, which receives funding in the context of Deltaplan Dementie from ZonMW Memorabel and Alzheimer Nederland. Further funding was also obtained from the Stichting Erasmus Trustfonds. This study was further supported by a 2020 NARSAD Young Investigator Grant from the Brain & Behavior Research Foundation. The authors reported no conflicts of interest or relevant financial relationships.

A version of this article appeared on Medscape.com.

TOPLINE:

Antidepressants are not associated with an increased risk for dementia, accelerated cognitive decline, or atrophy of white and gray matter in adults with no signs of cognitive impairment, new research suggests.

METHODOLOGY:

• Investigators studied 5511 individuals (58% women; mean age, 71 years) from the Rotterdam study, an ongoing prospective population-based cohort study.
• Participants were free from dementia at baseline, and incident dementia was monitored from baseline until 2018 with repeated cognitive assessments using the Mini-Mental Status Examination (MMSE) and the Geriatric Mental Schedule, as well as MRIs.
• Information on participants’ antidepressant use was extracted from pharmacy records from 1992 until baseline (2002-2008).
• During a mean follow-up of 10 years, 12% of participants developed dementia.

TAKEAWAY:

• Overall, 17% of participants had used antidepressants during the roughly 10-year period prior to baseline, and 4.1% were still using antidepressants at baseline.
• Medication use at baseline was more common in women than in men (21% vs 18%), and use increased with age: From 2.1% in participants aged between 45 and 50 years to 4.5% in those older than 80 years.
• After adjustment for confounders, there was no association between antidepressant use and dementia risk (hazard ratio [HR], 1.14; 95% CI, 0.92-1.41), accelerated cognitive decline, or atrophy of white and gray matter.
• However, tricyclic antidepressant use was associated with increased dementia risk (HR, 1.36; 95% CI, 1.01-1.83) compared with the use of selective serotonin reuptake inhibitors (HR, 1.12; 95% CI, 0.81-1.54).

IN PRACTICE:

“Although prescription of antidepressant medication in older individuals, in particular those with some cognitive impairment, may have acute symptomatic anticholinergic effects that warrant consideration in clinical practice, our results show that long-term antidepressant use does not have lasting effects on cognition or brain health in older adults without indication of cognitive impairment,” the authors wrote.

SOURCE:

Frank J. Wolters, MD, of the Department of Epidemiology and the Department of Radiology and Nuclear Medicine and Alzheimer Center, Erasmus University Medical Center, Rotterdam, the Netherlands, was the senior author on this study that was published online in Alzheimer’s and Dementia.

LIMITATIONS:

Limitations included the concern that although exclusion of participants with MMSE < 26 at baseline prevented reversed causation (ie, antidepressant use in response to depression during the prodromal phase of dementia), it may have introduced selection bias by disregarding the effects of antidepressant use prior to baseline and excluding participants with lower education.

DISCLOSURES:

This study was conducted as part of the Netherlands Consortium of Dementia Cohorts, which receives funding in the context of Deltaplan Dementie from ZonMW Memorabel and Alzheimer Nederland. Further funding was also obtained from the Stichting Erasmus Trustfonds. This study was further supported by a 2020 NARSAD Young Investigator Grant from the Brain & Behavior Research Foundation. The authors reported no conflicts of interest or relevant financial relationships.

A version of this article appeared on Medscape.com.

TOPLINE:

Antidepressants are not associated with an increased risk for dementia, accelerated cognitive decline, or atrophy of white and gray matter in adults with no signs of cognitive impairment, new research suggests.

METHODOLOGY:

• Investigators studied 5511 individuals (58% women; mean age, 71 years) from the Rotterdam study, an ongoing prospective population-based cohort study.
• Participants were free from dementia at baseline, and incident dementia was monitored from baseline until 2018 with repeated cognitive assessments using the Mini-Mental Status Examination (MMSE) and the Geriatric Mental Schedule, as well as MRIs.
• Information on participants’ antidepressant use was extracted from pharmacy records from 1992 until baseline (2002-2008).
• During a mean follow-up of 10 years, 12% of participants developed dementia.

TAKEAWAY:

• Overall, 17% of participants had used antidepressants during the roughly 10-year period prior to baseline, and 4.1% were still using antidepressants at baseline.
• Medication use at baseline was more common in women than in men (21% vs 18%), and use increased with age: From 2.1% in participants aged between 45 and 50 years to 4.5% in those older than 80 years.
• After adjustment for confounders, there was no association between antidepressant use and dementia risk (hazard ratio [HR], 1.14; 95% CI, 0.92-1.41), accelerated cognitive decline, or atrophy of white and gray matter.
• However, tricyclic antidepressant use was associated with increased dementia risk (HR, 1.36; 95% CI, 1.01-1.83) compared with the use of selective serotonin reuptake inhibitors (HR, 1.12; 95% CI, 0.81-1.54).

IN PRACTICE:

“Although prescription of antidepressant medication in older individuals, in particular those with some cognitive impairment, may have acute symptomatic anticholinergic effects that warrant consideration in clinical practice, our results show that long-term antidepressant use does not have lasting effects on cognition or brain health in older adults without indication of cognitive impairment,” the authors wrote.

SOURCE:

Frank J. Wolters, MD, of the Department of Epidemiology and the Department of Radiology and Nuclear Medicine and Alzheimer Center, Erasmus University Medical Center, Rotterdam, the Netherlands, was the senior author on this study that was published online in Alzheimer’s and Dementia.

LIMITATIONS:

Limitations included the concern that although exclusion of participants with MMSE < 26 at baseline prevented reversed causation (ie, antidepressant use in response to depression during the prodromal phase of dementia), it may have introduced selection bias by disregarding the effects of antidepressant use prior to baseline and excluding participants with lower education.

DISCLOSURES:

This study was conducted as part of the Netherlands Consortium of Dementia Cohorts, which receives funding in the context of Deltaplan Dementie from ZonMW Memorabel and Alzheimer Nederland. Further funding was also obtained from the Stichting Erasmus Trustfonds. This study was further supported by a 2020 NARSAD Young Investigator Grant from the Brain & Behavior Research Foundation. The authors reported no conflicts of interest or relevant financial relationships.

A version of this article appeared on Medscape.com.

Rates of underdiagnosed dementia are higher in US states that require clinicians to report a dementia diagnosis to their department of motor vehicles (DMV), new research suggests.

Investigators found that primary care physicians (PCPs) in states with clinician reporting mandates had a 59% higher probability of underdiagnosing dementia compared with their counterparts in states that require patients to self-report or that have no reporting mandates.

“Our findings in this cross-sectional study raise concerns about potential adverse effects of mandatory clinician reporting for dementia diagnosis and underscore the need for careful consideration of the effect of such policies,” wrote the investigators, led by Soeren Mattke, MD, DSc, director of the USC Brain Health Observatory and research professor of economics at the University of Southern California, Los Angeles. 

The study was published online in JAMA Network Open.
 

Lack of Guidance 

As the US population ages, the number of older drivers is increasing, with 55.8 million drivers 65 years old or older. Approximately 7 million people in this age group have dementia — an estimate that is expected to increase to nearly 12 million by 2040.

The aging population raises a “critical policy question” about how to ensure road safety. Although the American Medical Association’s Code of Ethics outlines a physician’s obligation to identify drivers with medical impairments that impede safe driving, guidance restricting cognitively impaired drivers from driving is lacking.

In addition, evidence as to whether cognitive impairment indeed poses a threat to driving safety is mixed and has led to a lack of uniform policies with respect to reporting dementia. 

Four states explicitly require clinicians to report dementia diagnoses to the DMV, which will then determine the patient’s fitness to drive, whereas 14 states require people with dementia to self-report. The remaining states have no explicit reporting requirements.

The issue of mandatory reporting is controversial, the researchers noted. On the one hand, physicians could protect patients and others by reporting potentially unsafe drivers.

On the other hand, evidence of an association with lower accident risks in patients with dementia is sparse and mandatory reporting may adversely affect physician-patient relationships. Empirical evidence for unintended consequences of reporting laws is lacking.

To examine the potential link between dementia underdiagnosis and mandatory reporting policies, the investigators analyzed the 100% data from the Medicare fee-for-service program and Medicare Advantage plans from 2017 to 2019, which included 223,036 PCPs with a panel of 25 or more Medicare patients.

The researchers examined dementia diagnosis rates in the patient panel of PCPs, rather than neurologists or gerontologists, regardless of who documented the diagnosis. Dr. Mattke said that it is possible that the diagnosis was established after referral to a specialist.

Each physician’s expected number of dementia cases was estimated using a predictive model based on patient characteristics. The researchers then compared the estimate with observed dementia diagnoses, thereby identifying clinicians who underdiagnosed dementia after sampling errors were accounted for.
 

‘Heavy-Handed Interference’

The researchers adjusted for several covariates potentially associated with a clinician’s probability of underdiagnosing dementia. These included sex, office location, practice specialty, racial/ethnic composition of the patient panel, and percentage of patients dually eligible for Medicare and Medicaid. The table shows PCP characteristics.

167934_table_web.jpg

“Our study is the first to provide empirical evidence for the potential adverse effects of reporting policies,” the researchers noted. “Although we found that some clinicians underdiagnosed dementia regardless of state mandates, the key finding of this study reveals that primary care clinicians who practice in states with clinician reporting mandates were 59% more likely to do so…compared with those states with no reporting requirements…or driver self-reporting requirements.”

The investigators suggested that one potential explanation for underdiagnosis is patient resistance to cognitive testing. If patients were aware that the clinician was obligated by law to report their dementia diagnosis to the DMV, “they might be more inclined to conceal their symptoms or refuse further assessments, in addition to the general stigma and resistance to a formal assessment after a positive dementia screening result.”

“The findings suggest that policymakers might want to rethink those physician reporting mandates, since we also could not find conclusive evidence that they improve road safety,” Dr. Mattke said. “Maybe patients and their physicians can arrive at a sensible approach to determine driving fitness without such heavy-handed interference.”

However, he cautioned that the findings are not definitive and further study is needed before firm recommendations either for or against mandatory reporting. 

In addition, the researchers noted several study limitations. One is that dementia underdiagnosis may also be associated with factors not captured in their model, including physician-patient relationships, health literacy, or language barriers.

However, Dr. Mattke noted, “ my sense is that those unobservable factors are not systematically related to state reporting policies and having omitted them would therefore not bias our results.”

Experts Weigh In 

Commenting on the research, Morgan Daven, MA, the Alzheimer’s Association vice president of health systems, said that dementia is widely and significantly underdiagnosed, and not only in the states with dementia reporting mandates. Many factors may contribute to underdiagnosis, and although the study shows an association between reporting mandates and underdiagnosis, it does not demonstrate causation. 

That said, Mr. Daven added, “fear and stigma related to dementia may inhibit the clinician, the patient, and their family from pursuing detection and diagnosis for dementia. As a society, we need to address dementia fear and stigma for all parties.” 

He noted that useful tools include healthcare policies, workforce training, public awareness and education, and public policies to mitigate fear and stigma and their negative effects on diagnosis, care, support, and communication. 

A potential study limitation is that it relied only on diagnoses by PCPs. Mr. Daven noted that the diagnosis of Alzheimer’ disease — the most common cause of dementia — is confirmation of amyloid buildup via a biomarker test, using PET or cerebrospinal fluid analysis. 

“Both of these tests are extremely limited in their use and accessibility in a primary care setting. Inclusion of diagnoses by dementia specialists would provide a more complete picture,” he said. 

Mr. Daven added that the Alzheimer’s Association encourages families to proactively discuss driving and other disease-related safety concerns as soon as possible. The Alzheimer’s Association Dementia and Driving webpage offers tips and strategies to discuss driving concerns with a family member. 

In an accompanying editorial, Donald Redelmeier, MD, MS(HSR), and Vidhi Bhatt, BSc, both of the Department of Medicine, University of Toronto, differentiate the mandate for physicians to warn patients with dementia about traffic safety from the mandate for reporting child maltreatment, gunshot victims, or communicable diseases. They noted that mandated warnings “are not easy, can engender patient dissatisfaction, and need to be handled with tact.”

Yet, they pointed out, “breaking bad news is what practicing medicine entails.” They emphasized that, regardless of government mandates, “counseling patients for more road safety is an essential skill for clinicians in diverse states who hope to help their patients avoid becoming more traffic statistics.”

Research reported in this publication was supported by Genentech, a member of the Roche Group, and a grant from the National Institute on Aging of the National Institutes of Health. Dr. Mattke reported receiving grants from Genentech for a research contract with USC during the conduct of the study; personal fees from Eisai, Biogen, C2N, Novo Nordisk, Novartis, and Roche Genentech; and serving on the Senscio Systems board of directors, ALZpath scientific advisory board, AiCure scientific advisory board, and Boston Millennia Partners scientific advisory board outside the submitted work. The other authors’ disclosures are listed on the original paper. The editorial was supported by the Canada Research Chair in Medical Decision Sciences, the Canadian Institutes of Health Research, Kimel-Schatzky Traumatic Brain Injury Research Fund, and the Graduate Diploma Program in Health Research at the University of Toronto. The editorial authors report no other relevant financial relationships. 
 

A version of this article appeared on Medscape.com.

Rates of underdiagnosed dementia are higher in US states that require clinicians to report a dementia diagnosis to their department of motor vehicles (DMV), new research suggests.

Investigators found that primary care physicians (PCPs) in states with clinician reporting mandates had a 59% higher probability of underdiagnosing dementia compared with their counterparts in states that require patients to self-report or that have no reporting mandates.

“Our findings in this cross-sectional study raise concerns about potential adverse effects of mandatory clinician reporting for dementia diagnosis and underscore the need for careful consideration of the effect of such policies,” wrote the investigators, led by Soeren Mattke, MD, DSc, director of the USC Brain Health Observatory and research professor of economics at the University of Southern California, Los Angeles. 

The study was published online in JAMA Network Open.
 

Lack of Guidance 

As the US population ages, the number of older drivers is increasing, with 55.8 million drivers 65 years old or older. Approximately 7 million people in this age group have dementia — an estimate that is expected to increase to nearly 12 million by 2040.

The aging population raises a “critical policy question” about how to ensure road safety. Although the American Medical Association’s Code of Ethics outlines a physician’s obligation to identify drivers with medical impairments that impede safe driving, guidance restricting cognitively impaired drivers from driving is lacking.

In addition, evidence as to whether cognitive impairment indeed poses a threat to driving safety is mixed and has led to a lack of uniform policies with respect to reporting dementia. 

Four states explicitly require clinicians to report dementia diagnoses to the DMV, which will then determine the patient’s fitness to drive, whereas 14 states require people with dementia to self-report. The remaining states have no explicit reporting requirements.

The issue of mandatory reporting is controversial, the researchers noted. On the one hand, physicians could protect patients and others by reporting potentially unsafe drivers.

On the other hand, evidence of an association with lower accident risks in patients with dementia is sparse and mandatory reporting may adversely affect physician-patient relationships. Empirical evidence for unintended consequences of reporting laws is lacking.

To examine the potential link between dementia underdiagnosis and mandatory reporting policies, the investigators analyzed the 100% data from the Medicare fee-for-service program and Medicare Advantage plans from 2017 to 2019, which included 223,036 PCPs with a panel of 25 or more Medicare patients.

The researchers examined dementia diagnosis rates in the patient panel of PCPs, rather than neurologists or gerontologists, regardless of who documented the diagnosis. Dr. Mattke said that it is possible that the diagnosis was established after referral to a specialist.

Each physician’s expected number of dementia cases was estimated using a predictive model based on patient characteristics. The researchers then compared the estimate with observed dementia diagnoses, thereby identifying clinicians who underdiagnosed dementia after sampling errors were accounted for.
 

‘Heavy-Handed Interference’

The researchers adjusted for several covariates potentially associated with a clinician’s probability of underdiagnosing dementia. These included sex, office location, practice specialty, racial/ethnic composition of the patient panel, and percentage of patients dually eligible for Medicare and Medicaid. The table shows PCP characteristics.

167934_table_web.jpg

“Our study is the first to provide empirical evidence for the potential adverse effects of reporting policies,” the researchers noted. “Although we found that some clinicians underdiagnosed dementia regardless of state mandates, the key finding of this study reveals that primary care clinicians who practice in states with clinician reporting mandates were 59% more likely to do so…compared with those states with no reporting requirements…or driver self-reporting requirements.”

The investigators suggested that one potential explanation for underdiagnosis is patient resistance to cognitive testing. If patients were aware that the clinician was obligated by law to report their dementia diagnosis to the DMV, “they might be more inclined to conceal their symptoms or refuse further assessments, in addition to the general stigma and resistance to a formal assessment after a positive dementia screening result.”

“The findings suggest that policymakers might want to rethink those physician reporting mandates, since we also could not find conclusive evidence that they improve road safety,” Dr. Mattke said. “Maybe patients and their physicians can arrive at a sensible approach to determine driving fitness without such heavy-handed interference.”

However, he cautioned that the findings are not definitive and further study is needed before firm recommendations either for or against mandatory reporting. 

In addition, the researchers noted several study limitations. One is that dementia underdiagnosis may also be associated with factors not captured in their model, including physician-patient relationships, health literacy, or language barriers.

However, Dr. Mattke noted, “ my sense is that those unobservable factors are not systematically related to state reporting policies and having omitted them would therefore not bias our results.”

Experts Weigh In 

Commenting on the research, Morgan Daven, MA, the Alzheimer’s Association vice president of health systems, said that dementia is widely and significantly underdiagnosed, and not only in the states with dementia reporting mandates. Many factors may contribute to underdiagnosis, and although the study shows an association between reporting mandates and underdiagnosis, it does not demonstrate causation. 

That said, Mr. Daven added, “fear and stigma related to dementia may inhibit the clinician, the patient, and their family from pursuing detection and diagnosis for dementia. As a society, we need to address dementia fear and stigma for all parties.” 

He noted that useful tools include healthcare policies, workforce training, public awareness and education, and public policies to mitigate fear and stigma and their negative effects on diagnosis, care, support, and communication. 

A potential study limitation is that it relied only on diagnoses by PCPs. Mr. Daven noted that the diagnosis of Alzheimer’ disease — the most common cause of dementia — is confirmation of amyloid buildup via a biomarker test, using PET or cerebrospinal fluid analysis. 

“Both of these tests are extremely limited in their use and accessibility in a primary care setting. Inclusion of diagnoses by dementia specialists would provide a more complete picture,” he said. 

Mr. Daven added that the Alzheimer’s Association encourages families to proactively discuss driving and other disease-related safety concerns as soon as possible. The Alzheimer’s Association Dementia and Driving webpage offers tips and strategies to discuss driving concerns with a family member. 

In an accompanying editorial, Donald Redelmeier, MD, MS(HSR), and Vidhi Bhatt, BSc, both of the Department of Medicine, University of Toronto, differentiate the mandate for physicians to warn patients with dementia about traffic safety from the mandate for reporting child maltreatment, gunshot victims, or communicable diseases. They noted that mandated warnings “are not easy, can engender patient dissatisfaction, and need to be handled with tact.”

Yet, they pointed out, “breaking bad news is what practicing medicine entails.” They emphasized that, regardless of government mandates, “counseling patients for more road safety is an essential skill for clinicians in diverse states who hope to help their patients avoid becoming more traffic statistics.”

Research reported in this publication was supported by Genentech, a member of the Roche Group, and a grant from the National Institute on Aging of the National Institutes of Health. Dr. Mattke reported receiving grants from Genentech for a research contract with USC during the conduct of the study; personal fees from Eisai, Biogen, C2N, Novo Nordisk, Novartis, and Roche Genentech; and serving on the Senscio Systems board of directors, ALZpath scientific advisory board, AiCure scientific advisory board, and Boston Millennia Partners scientific advisory board outside the submitted work. The other authors’ disclosures are listed on the original paper. The editorial was supported by the Canada Research Chair in Medical Decision Sciences, the Canadian Institutes of Health Research, Kimel-Schatzky Traumatic Brain Injury Research Fund, and the Graduate Diploma Program in Health Research at the University of Toronto. The editorial authors report no other relevant financial relationships. 
 

A version of this article appeared on Medscape.com.

Rates of underdiagnosed dementia are higher in US states that require clinicians to report a dementia diagnosis to their department of motor vehicles (DMV), new research suggests.

Investigators found that primary care physicians (PCPs) in states with clinician reporting mandates had a 59% higher probability of underdiagnosing dementia compared with their counterparts in states that require patients to self-report or that have no reporting mandates.

“Our findings in this cross-sectional study raise concerns about potential adverse effects of mandatory clinician reporting for dementia diagnosis and underscore the need for careful consideration of the effect of such policies,” wrote the investigators, led by Soeren Mattke, MD, DSc, director of the USC Brain Health Observatory and research professor of economics at the University of Southern California, Los Angeles. 

The study was published online in JAMA Network Open.
 

Lack of Guidance 

As the US population ages, the number of older drivers is increasing, with 55.8 million drivers 65 years old or older. Approximately 7 million people in this age group have dementia — an estimate that is expected to increase to nearly 12 million by 2040.

The aging population raises a “critical policy question” about how to ensure road safety. Although the American Medical Association’s Code of Ethics outlines a physician’s obligation to identify drivers with medical impairments that impede safe driving, guidance restricting cognitively impaired drivers from driving is lacking.

In addition, evidence as to whether cognitive impairment indeed poses a threat to driving safety is mixed and has led to a lack of uniform policies with respect to reporting dementia. 

Four states explicitly require clinicians to report dementia diagnoses to the DMV, which will then determine the patient’s fitness to drive, whereas 14 states require people with dementia to self-report. The remaining states have no explicit reporting requirements.

The issue of mandatory reporting is controversial, the researchers noted. On the one hand, physicians could protect patients and others by reporting potentially unsafe drivers.

On the other hand, evidence of an association with lower accident risks in patients with dementia is sparse and mandatory reporting may adversely affect physician-patient relationships. Empirical evidence for unintended consequences of reporting laws is lacking.

To examine the potential link between dementia underdiagnosis and mandatory reporting policies, the investigators analyzed the 100% data from the Medicare fee-for-service program and Medicare Advantage plans from 2017 to 2019, which included 223,036 PCPs with a panel of 25 or more Medicare patients.

The researchers examined dementia diagnosis rates in the patient panel of PCPs, rather than neurologists or gerontologists, regardless of who documented the diagnosis. Dr. Mattke said that it is possible that the diagnosis was established after referral to a specialist.

Each physician’s expected number of dementia cases was estimated using a predictive model based on patient characteristics. The researchers then compared the estimate with observed dementia diagnoses, thereby identifying clinicians who underdiagnosed dementia after sampling errors were accounted for.
 

‘Heavy-Handed Interference’

The researchers adjusted for several covariates potentially associated with a clinician’s probability of underdiagnosing dementia. These included sex, office location, practice specialty, racial/ethnic composition of the patient panel, and percentage of patients dually eligible for Medicare and Medicaid. The table shows PCP characteristics.

167934_table_web.jpg

“Our study is the first to provide empirical evidence for the potential adverse effects of reporting policies,” the researchers noted. “Although we found that some clinicians underdiagnosed dementia regardless of state mandates, the key finding of this study reveals that primary care clinicians who practice in states with clinician reporting mandates were 59% more likely to do so…compared with those states with no reporting requirements…or driver self-reporting requirements.”

The investigators suggested that one potential explanation for underdiagnosis is patient resistance to cognitive testing. If patients were aware that the clinician was obligated by law to report their dementia diagnosis to the DMV, “they might be more inclined to conceal their symptoms or refuse further assessments, in addition to the general stigma and resistance to a formal assessment after a positive dementia screening result.”

“The findings suggest that policymakers might want to rethink those physician reporting mandates, since we also could not find conclusive evidence that they improve road safety,” Dr. Mattke said. “Maybe patients and their physicians can arrive at a sensible approach to determine driving fitness without such heavy-handed interference.”

However, he cautioned that the findings are not definitive and further study is needed before firm recommendations either for or against mandatory reporting. 

In addition, the researchers noted several study limitations. One is that dementia underdiagnosis may also be associated with factors not captured in their model, including physician-patient relationships, health literacy, or language barriers.

However, Dr. Mattke noted, “ my sense is that those unobservable factors are not systematically related to state reporting policies and having omitted them would therefore not bias our results.”

Experts Weigh In 

Commenting on the research, Morgan Daven, MA, the Alzheimer’s Association vice president of health systems, said that dementia is widely and significantly underdiagnosed, and not only in the states with dementia reporting mandates. Many factors may contribute to underdiagnosis, and although the study shows an association between reporting mandates and underdiagnosis, it does not demonstrate causation. 

That said, Mr. Daven added, “fear and stigma related to dementia may inhibit the clinician, the patient, and their family from pursuing detection and diagnosis for dementia. As a society, we need to address dementia fear and stigma for all parties.” 

He noted that useful tools include healthcare policies, workforce training, public awareness and education, and public policies to mitigate fear and stigma and their negative effects on diagnosis, care, support, and communication. 

A potential study limitation is that it relied only on diagnoses by PCPs. Mr. Daven noted that the diagnosis of Alzheimer’ disease — the most common cause of dementia — is confirmation of amyloid buildup via a biomarker test, using PET or cerebrospinal fluid analysis. 

“Both of these tests are extremely limited in their use and accessibility in a primary care setting. Inclusion of diagnoses by dementia specialists would provide a more complete picture,” he said. 

Mr. Daven added that the Alzheimer’s Association encourages families to proactively discuss driving and other disease-related safety concerns as soon as possible. The Alzheimer’s Association Dementia and Driving webpage offers tips and strategies to discuss driving concerns with a family member. 

In an accompanying editorial, Donald Redelmeier, MD, MS(HSR), and Vidhi Bhatt, BSc, both of the Department of Medicine, University of Toronto, differentiate the mandate for physicians to warn patients with dementia about traffic safety from the mandate for reporting child maltreatment, gunshot victims, or communicable diseases. They noted that mandated warnings “are not easy, can engender patient dissatisfaction, and need to be handled with tact.”

Yet, they pointed out, “breaking bad news is what practicing medicine entails.” They emphasized that, regardless of government mandates, “counseling patients for more road safety is an essential skill for clinicians in diverse states who hope to help their patients avoid becoming more traffic statistics.”

Research reported in this publication was supported by Genentech, a member of the Roche Group, and a grant from the National Institute on Aging of the National Institutes of Health. Dr. Mattke reported receiving grants from Genentech for a research contract with USC during the conduct of the study; personal fees from Eisai, Biogen, C2N, Novo Nordisk, Novartis, and Roche Genentech; and serving on the Senscio Systems board of directors, ALZpath scientific advisory board, AiCure scientific advisory board, and Boston Millennia Partners scientific advisory board outside the submitted work. The other authors’ disclosures are listed on the original paper. The editorial was supported by the Canada Research Chair in Medical Decision Sciences, the Canadian Institutes of Health Research, Kimel-Schatzky Traumatic Brain Injury Research Fund, and the Graduate Diploma Program in Health Research at the University of Toronto. The editorial authors report no other relevant financial relationships. 
 

A version of this article appeared on Medscape.com.

Immunization with inactivated vaccines while receiving the natalizumab for highly active multiple sclerosis (MS) is safe and immunogenic, with no increased risk for disease progression, new research shows. 

The study, the first to examine vaccine safety and immunogenicity in highly active MS, revealed high seroprotection rates following receipt of vaccines for COVID-19 and hepatitis A and B, regardless of the duration of treatment with natalizumab.

On the basis of these findings, investigators created an algorithm that clinicians can use to map an immunization schedule in patients who might otherwise delay initiation of disease-modifying therapy until they are fully vaccinated.

“We observed seroprotection rates exceeding 90% for hepatitis A and B, and mRNA COVID-19 vaccines, and all vaccines demonstrated a favorable safety profile, with no exacerbation of disease activity detected,” said lead author René Carvajal, MD, of the Department of Neurology-Neuroimmunology, Multiple Sclerosis Centre of Catalonia (Cemcat), Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain. “This points to potential benefits for patients with highly active MS who require both immunization and high-efficacy therapies that may impact vaccine responses.” 

The study was published online in JAMA Network Open.
 

A Controversial Issue

Today’s high-efficacy therapies for MS may increase the risk of acquiring new infections, reactivate latent pathogens, or worsen ongoing infectious conditions, and immunogenicity of vaccination can be compromised by immunosuppressive agents, particularly CD20 therapies, researchers noted.

As a result, many clinicians opt to delay initiation of such therapies until vaccination schedules are complete to avoid exposure to vaccine-preventable infections. But delaying treatment can potentially affect disease progression. 

Reports of disease worsening following vaccination “have raised controversy around vaccine safety,” the authors wrote. The issue is especially relevant to those with highly active MS due to the scarcity of available data in this population.

The motivation for the study “stemmed from the complex balance clinicians face between initiating highly effective therapies promptly in patients with highly active MS and ensuring adequate protection against preventable infections through vaccination,” Dr. Carvajal said.
 

High Seroprotection Rate

Researchers analyzed data on 60 patients (mean age, 43 years; 44 female; mean disease duration, 17 years) participating in one of two prospectively followed cohorts: The Barcelona Clinically Isolated Syndromes Inception Cohort and the Barcelona Treatment Cohort. Data included demographic, clinical, radiologic, and biological data as well as regular clinical assessments, evaluations of the Expanded Disability Status Scale (EDSS), and MRI scans.

Patients enrolled in the current study had received at least one of these vaccines between September 2016 and February 2022: hepatitis A virus (HAV), hepatitis B virus (HBV; enhanced immunity high load or adjuvanted), or COVID-19 (BNT162b2 [Pfizer-BioNTech], mRAN-1273 [Moderna], or ChAdOx1-S [recombinant; AstraZeneca]).

The researchers conducted a retrospective, self-controlled analysis to compare the annualized relapse rate, EDSS score, and new T2 lesions counts during the 12 months before and after vaccination in patients with short- and long-term treatment duration.

They also compared John Cunningham virus serostatus between the two periods, as well as immunoglobulin G titers for each vaccine.

The global seroprotection rate was 93% (95% CI, 86%-98%). Individual vaccine rates were 92% for HAV, 93% for HBV, and 100% for COVID-19.

There was a significant reduction between the pre- and postvaccination periods in mean relapse rates (P = .004) and median number of new T2 lesions (P  = .01).

There were no changes in EDSS scores before and after vaccinations and duration of natalizumab treatment had no impact on safety and immunogenicity.
 

‘Viable Option’

The researchers used their findings to create a proposed algorithm to inform immunization decisions in patients with highly active MS who require prompt initiation of high-efficacy disease-modifying therapy.

The algorithm is “integrated into a risk-minimization strategy tailored for patients with highly active MS, emphasizing in this case the pivotal role of natalizumab in averting treatment delays and providing adequate protection against potentially severe infections,” Dr. Carvajal said.

Participants who initiated or continued treatment with natalizumab completed their vaccination regimen without any incidents of progressive multifocal leukoencephalopathy (PML) or disease activity rebound following natalizumab discontinuation.

This suggests that using natalizumab for a brief duration might be a “viable option to contemplate,” the authors noted.

Commenting on the findings, Grace Gombolay, MD, assistant professor of pediatrics in the Division of Pediatric Neurology and director of the Pediatric Neuroimmunology and Multiple Sclerosis Clinic, Emory University, Atlanta, Georgia, said the study “demonstrates that vaccines are safe and do not trigger attacks in patients with MS on natalizumab, and that immunity — as measured by antibodies — is preserved in MS patients who receive natalizumab.”

This “contrasts with other treatments, as decreased antibody responses in COVID-19 are noted in certain treatments,” said Dr. Gombolay, who was not part of the study. “If both disease control and immunity against infection are the goals for the patient, then natalizumab is a reasonable option.” 

“However, this must be balanced with other considerations,” she added, including the risk for PML and pregnancy. 

This study was supported by grants from the European Committee for Treatment and Research in Multiple Sclerosis, Instituto de Salud Carlos III, and the European Union. Dr. Carvajal reported receiving grants from Vall d’Hebron Institut de Recerca and the European Committee for Treatment and Research in Multiple Sclerosis and honoraria from Roche, Novartis, BIIB-Colombia, Merck, and Sanofi outside the submitted work. Dr. Gombolay serves as media editor for Pediatric Neurology and as associate editor of the Annals of the Child Neurology Society. She is also a part-time CDC consultant for acute flaccid myelitis and received an honorarium as a speaker at the Georgia Neurological Society meeting, sponsored by Academic CME and TG Therapeutics.

A version of this article appeared on Medscape.com.

Immunization with inactivated vaccines while receiving the natalizumab for highly active multiple sclerosis (MS) is safe and immunogenic, with no increased risk for disease progression, new research shows. 

The study, the first to examine vaccine safety and immunogenicity in highly active MS, revealed high seroprotection rates following receipt of vaccines for COVID-19 and hepatitis A and B, regardless of the duration of treatment with natalizumab.

On the basis of these findings, investigators created an algorithm that clinicians can use to map an immunization schedule in patients who might otherwise delay initiation of disease-modifying therapy until they are fully vaccinated.

“We observed seroprotection rates exceeding 90% for hepatitis A and B, and mRNA COVID-19 vaccines, and all vaccines demonstrated a favorable safety profile, with no exacerbation of disease activity detected,” said lead author René Carvajal, MD, of the Department of Neurology-Neuroimmunology, Multiple Sclerosis Centre of Catalonia (Cemcat), Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain. “This points to potential benefits for patients with highly active MS who require both immunization and high-efficacy therapies that may impact vaccine responses.” 

The study was published online in JAMA Network Open.
 

A Controversial Issue

Today’s high-efficacy therapies for MS may increase the risk of acquiring new infections, reactivate latent pathogens, or worsen ongoing infectious conditions, and immunogenicity of vaccination can be compromised by immunosuppressive agents, particularly CD20 therapies, researchers noted.

As a result, many clinicians opt to delay initiation of such therapies until vaccination schedules are complete to avoid exposure to vaccine-preventable infections. But delaying treatment can potentially affect disease progression. 

Reports of disease worsening following vaccination “have raised controversy around vaccine safety,” the authors wrote. The issue is especially relevant to those with highly active MS due to the scarcity of available data in this population.

The motivation for the study “stemmed from the complex balance clinicians face between initiating highly effective therapies promptly in patients with highly active MS and ensuring adequate protection against preventable infections through vaccination,” Dr. Carvajal said.
 

High Seroprotection Rate

Researchers analyzed data on 60 patients (mean age, 43 years; 44 female; mean disease duration, 17 years) participating in one of two prospectively followed cohorts: The Barcelona Clinically Isolated Syndromes Inception Cohort and the Barcelona Treatment Cohort. Data included demographic, clinical, radiologic, and biological data as well as regular clinical assessments, evaluations of the Expanded Disability Status Scale (EDSS), and MRI scans.

Patients enrolled in the current study had received at least one of these vaccines between September 2016 and February 2022: hepatitis A virus (HAV), hepatitis B virus (HBV; enhanced immunity high load or adjuvanted), or COVID-19 (BNT162b2 [Pfizer-BioNTech], mRAN-1273 [Moderna], or ChAdOx1-S [recombinant; AstraZeneca]).

The researchers conducted a retrospective, self-controlled analysis to compare the annualized relapse rate, EDSS score, and new T2 lesions counts during the 12 months before and after vaccination in patients with short- and long-term treatment duration.

They also compared John Cunningham virus serostatus between the two periods, as well as immunoglobulin G titers for each vaccine.

The global seroprotection rate was 93% (95% CI, 86%-98%). Individual vaccine rates were 92% for HAV, 93% for HBV, and 100% for COVID-19.

There was a significant reduction between the pre- and postvaccination periods in mean relapse rates (P = .004) and median number of new T2 lesions (P  = .01).

There were no changes in EDSS scores before and after vaccinations and duration of natalizumab treatment had no impact on safety and immunogenicity.
 

‘Viable Option’

The researchers used their findings to create a proposed algorithm to inform immunization decisions in patients with highly active MS who require prompt initiation of high-efficacy disease-modifying therapy.

The algorithm is “integrated into a risk-minimization strategy tailored for patients with highly active MS, emphasizing in this case the pivotal role of natalizumab in averting treatment delays and providing adequate protection against potentially severe infections,” Dr. Carvajal said.

Participants who initiated or continued treatment with natalizumab completed their vaccination regimen without any incidents of progressive multifocal leukoencephalopathy (PML) or disease activity rebound following natalizumab discontinuation.

This suggests that using natalizumab for a brief duration might be a “viable option to contemplate,” the authors noted.

Commenting on the findings, Grace Gombolay, MD, assistant professor of pediatrics in the Division of Pediatric Neurology and director of the Pediatric Neuroimmunology and Multiple Sclerosis Clinic, Emory University, Atlanta, Georgia, said the study “demonstrates that vaccines are safe and do not trigger attacks in patients with MS on natalizumab, and that immunity — as measured by antibodies — is preserved in MS patients who receive natalizumab.”

This “contrasts with other treatments, as decreased antibody responses in COVID-19 are noted in certain treatments,” said Dr. Gombolay, who was not part of the study. “If both disease control and immunity against infection are the goals for the patient, then natalizumab is a reasonable option.” 

“However, this must be balanced with other considerations,” she added, including the risk for PML and pregnancy. 

This study was supported by grants from the European Committee for Treatment and Research in Multiple Sclerosis, Instituto de Salud Carlos III, and the European Union. Dr. Carvajal reported receiving grants from Vall d’Hebron Institut de Recerca and the European Committee for Treatment and Research in Multiple Sclerosis and honoraria from Roche, Novartis, BIIB-Colombia, Merck, and Sanofi outside the submitted work. Dr. Gombolay serves as media editor for Pediatric Neurology and as associate editor of the Annals of the Child Neurology Society. She is also a part-time CDC consultant for acute flaccid myelitis and received an honorarium as a speaker at the Georgia Neurological Society meeting, sponsored by Academic CME and TG Therapeutics.

A version of this article appeared on Medscape.com.

Immunization with inactivated vaccines while receiving the natalizumab for highly active multiple sclerosis (MS) is safe and immunogenic, with no increased risk for disease progression, new research shows. 

The study, the first to examine vaccine safety and immunogenicity in highly active MS, revealed high seroprotection rates following receipt of vaccines for COVID-19 and hepatitis A and B, regardless of the duration of treatment with natalizumab.

On the basis of these findings, investigators created an algorithm that clinicians can use to map an immunization schedule in patients who might otherwise delay initiation of disease-modifying therapy until they are fully vaccinated.

“We observed seroprotection rates exceeding 90% for hepatitis A and B, and mRNA COVID-19 vaccines, and all vaccines demonstrated a favorable safety profile, with no exacerbation of disease activity detected,” said lead author René Carvajal, MD, of the Department of Neurology-Neuroimmunology, Multiple Sclerosis Centre of Catalonia (Cemcat), Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain. “This points to potential benefits for patients with highly active MS who require both immunization and high-efficacy therapies that may impact vaccine responses.” 

The study was published online in JAMA Network Open.
 

A Controversial Issue

Today’s high-efficacy therapies for MS may increase the risk of acquiring new infections, reactivate latent pathogens, or worsen ongoing infectious conditions, and immunogenicity of vaccination can be compromised by immunosuppressive agents, particularly CD20 therapies, researchers noted.

As a result, many clinicians opt to delay initiation of such therapies until vaccination schedules are complete to avoid exposure to vaccine-preventable infections. But delaying treatment can potentially affect disease progression. 

Reports of disease worsening following vaccination “have raised controversy around vaccine safety,” the authors wrote. The issue is especially relevant to those with highly active MS due to the scarcity of available data in this population.

The motivation for the study “stemmed from the complex balance clinicians face between initiating highly effective therapies promptly in patients with highly active MS and ensuring adequate protection against preventable infections through vaccination,” Dr. Carvajal said.
 

High Seroprotection Rate

Researchers analyzed data on 60 patients (mean age, 43 years; 44 female; mean disease duration, 17 years) participating in one of two prospectively followed cohorts: The Barcelona Clinically Isolated Syndromes Inception Cohort and the Barcelona Treatment Cohort. Data included demographic, clinical, radiologic, and biological data as well as regular clinical assessments, evaluations of the Expanded Disability Status Scale (EDSS), and MRI scans.

Patients enrolled in the current study had received at least one of these vaccines between September 2016 and February 2022: hepatitis A virus (HAV), hepatitis B virus (HBV; enhanced immunity high load or adjuvanted), or COVID-19 (BNT162b2 [Pfizer-BioNTech], mRAN-1273 [Moderna], or ChAdOx1-S [recombinant; AstraZeneca]).

The researchers conducted a retrospective, self-controlled analysis to compare the annualized relapse rate, EDSS score, and new T2 lesions counts during the 12 months before and after vaccination in patients with short- and long-term treatment duration.

They also compared John Cunningham virus serostatus between the two periods, as well as immunoglobulin G titers for each vaccine.

The global seroprotection rate was 93% (95% CI, 86%-98%). Individual vaccine rates were 92% for HAV, 93% for HBV, and 100% for COVID-19.

There was a significant reduction between the pre- and postvaccination periods in mean relapse rates (P = .004) and median number of new T2 lesions (P  = .01).

There were no changes in EDSS scores before and after vaccinations and duration of natalizumab treatment had no impact on safety and immunogenicity.
 

‘Viable Option’

The researchers used their findings to create a proposed algorithm to inform immunization decisions in patients with highly active MS who require prompt initiation of high-efficacy disease-modifying therapy.

The algorithm is “integrated into a risk-minimization strategy tailored for patients with highly active MS, emphasizing in this case the pivotal role of natalizumab in averting treatment delays and providing adequate protection against potentially severe infections,” Dr. Carvajal said.

Participants who initiated or continued treatment with natalizumab completed their vaccination regimen without any incidents of progressive multifocal leukoencephalopathy (PML) or disease activity rebound following natalizumab discontinuation.

This suggests that using natalizumab for a brief duration might be a “viable option to contemplate,” the authors noted.

Commenting on the findings, Grace Gombolay, MD, assistant professor of pediatrics in the Division of Pediatric Neurology and director of the Pediatric Neuroimmunology and Multiple Sclerosis Clinic, Emory University, Atlanta, Georgia, said the study “demonstrates that vaccines are safe and do not trigger attacks in patients with MS on natalizumab, and that immunity — as measured by antibodies — is preserved in MS patients who receive natalizumab.”

This “contrasts with other treatments, as decreased antibody responses in COVID-19 are noted in certain treatments,” said Dr. Gombolay, who was not part of the study. “If both disease control and immunity against infection are the goals for the patient, then natalizumab is a reasonable option.” 

“However, this must be balanced with other considerations,” she added, including the risk for PML and pregnancy. 

This study was supported by grants from the European Committee for Treatment and Research in Multiple Sclerosis, Instituto de Salud Carlos III, and the European Union. Dr. Carvajal reported receiving grants from Vall d’Hebron Institut de Recerca and the European Committee for Treatment and Research in Multiple Sclerosis and honoraria from Roche, Novartis, BIIB-Colombia, Merck, and Sanofi outside the submitted work. Dr. Gombolay serves as media editor for Pediatric Neurology and as associate editor of the Annals of the Child Neurology Society. She is also a part-time CDC consultant for acute flaccid myelitis and received an honorarium as a speaker at the Georgia Neurological Society meeting, sponsored by Academic CME and TG Therapeutics.

A version of this article appeared on Medscape.com.

TOPLINE:

Decreased total sleep time (TST) and increased resting heart rate (RHR), heart rate variability (HRV), and average nightly respiratory rate (ARR) as measured by a multisensor device worn during sleep accurately correlated with self-reported stress levels in college students, a new study suggests. Investigators say the findings support the potential utility of wearable devices to collect data that identify young adults at greatest risk for stress. 

METHODOLOGY:

• First-semester college students (n = 525; aged 18-24 years) enrolled in the Lived Experiences measured Using Rings Study (LEMURS) provided continuous biometric data via a wearable device (Oura Ring; Oura Health) and answered weekly surveys regarding stress levels.
• The researchers used mixed-effects regression models to identify associations between perceived stress scores and average nightly TST, RHR, HRV, and ARR.

TAKEAWAY:

• Consistent associations were found between perceived stress scores and TST, RHR, HRV, and ARR, which persisted even after controlling for gender and week of the semester.
• Risk for moderate to high stress decreased by 38% with every additional hour of TST (P < .01) and by 1.2% with each millisecond increase in HRV (P < .05).
• Moderate to high stress risk increased by 3.6% with each beat-per-minute-increase in RHR (P < .01) and by 23% with each additional breath-per-minute increase in ARR (P < .01).
• Participants who identified as female, nonbinary, or transgender reported significantly higher stress throughout the study.

IN PRACTICE:

“The present work highlights the potential utility of monitoring sleep, suggesting that these measures may identify within individual changes that are concerning for stress. As the demand for mental health services grows, determining which wearable-derived sleep estimates provide information about well-being and can predict worsening mental health in young adults is an important area of study,” study authors wrote.

SOURCE:

The study, led by Laura S.P. Bloomfield, University of Vermont, Burlington, Vermont, was published online in PLOS Digital Health.

LIMITATIONS:

The study focused on raw sleep measures; the researchers suggest that future studies evaluate additional sleep variables (eg, daytime naps), which have been associated with mental health in college students. In addition, the researchers did not have stress or sleep data before participants started college, so they could not assess the impact of starting college on participants’ sleep.

DISCLOSURES:

Bloomfield was supported by the Gund Fellowship and received a partial salary from the Mass Mutual Insurance Wellness Initiative. Other authors’ funding is reported in the original article.

A version of this article appeared on Medscape.com.

TOPLINE:

Decreased total sleep time (TST) and increased resting heart rate (RHR), heart rate variability (HRV), and average nightly respiratory rate (ARR) as measured by a multisensor device worn during sleep accurately correlated with self-reported stress levels in college students, a new study suggests. Investigators say the findings support the potential utility of wearable devices to collect data that identify young adults at greatest risk for stress. 

METHODOLOGY:

• First-semester college students (n = 525; aged 18-24 years) enrolled in the Lived Experiences measured Using Rings Study (LEMURS) provided continuous biometric data via a wearable device (Oura Ring; Oura Health) and answered weekly surveys regarding stress levels.
• The researchers used mixed-effects regression models to identify associations between perceived stress scores and average nightly TST, RHR, HRV, and ARR.

TAKEAWAY:

• Consistent associations were found between perceived stress scores and TST, RHR, HRV, and ARR, which persisted even after controlling for gender and week of the semester.
• Risk for moderate to high stress decreased by 38% with every additional hour of TST (P < .01) and by 1.2% with each millisecond increase in HRV (P < .05).
• Moderate to high stress risk increased by 3.6% with each beat-per-minute-increase in RHR (P < .01) and by 23% with each additional breath-per-minute increase in ARR (P < .01).
• Participants who identified as female, nonbinary, or transgender reported significantly higher stress throughout the study.

IN PRACTICE:

“The present work highlights the potential utility of monitoring sleep, suggesting that these measures may identify within individual changes that are concerning for stress. As the demand for mental health services grows, determining which wearable-derived sleep estimates provide information about well-being and can predict worsening mental health in young adults is an important area of study,” study authors wrote.

SOURCE:

The study, led by Laura S.P. Bloomfield, University of Vermont, Burlington, Vermont, was published online in PLOS Digital Health.

LIMITATIONS:

The study focused on raw sleep measures; the researchers suggest that future studies evaluate additional sleep variables (eg, daytime naps), which have been associated with mental health in college students. In addition, the researchers did not have stress or sleep data before participants started college, so they could not assess the impact of starting college on participants’ sleep.

DISCLOSURES:

Bloomfield was supported by the Gund Fellowship and received a partial salary from the Mass Mutual Insurance Wellness Initiative. Other authors’ funding is reported in the original article.

A version of this article appeared on Medscape.com.

TOPLINE:

Decreased total sleep time (TST) and increased resting heart rate (RHR), heart rate variability (HRV), and average nightly respiratory rate (ARR) as measured by a multisensor device worn during sleep accurately correlated with self-reported stress levels in college students, a new study suggests. Investigators say the findings support the potential utility of wearable devices to collect data that identify young adults at greatest risk for stress. 

METHODOLOGY:

• First-semester college students (n = 525; aged 18-24 years) enrolled in the Lived Experiences measured Using Rings Study (LEMURS) provided continuous biometric data via a wearable device (Oura Ring; Oura Health) and answered weekly surveys regarding stress levels.
• The researchers used mixed-effects regression models to identify associations between perceived stress scores and average nightly TST, RHR, HRV, and ARR.

TAKEAWAY:

• Consistent associations were found between perceived stress scores and TST, RHR, HRV, and ARR, which persisted even after controlling for gender and week of the semester.
• Risk for moderate to high stress decreased by 38% with every additional hour of TST (P < .01) and by 1.2% with each millisecond increase in HRV (P < .05).
• Moderate to high stress risk increased by 3.6% with each beat-per-minute-increase in RHR (P < .01) and by 23% with each additional breath-per-minute increase in ARR (P < .01).
• Participants who identified as female, nonbinary, or transgender reported significantly higher stress throughout the study.

IN PRACTICE:

“The present work highlights the potential utility of monitoring sleep, suggesting that these measures may identify within individual changes that are concerning for stress. As the demand for mental health services grows, determining which wearable-derived sleep estimates provide information about well-being and can predict worsening mental health in young adults is an important area of study,” study authors wrote.

SOURCE:

The study, led by Laura S.P. Bloomfield, University of Vermont, Burlington, Vermont, was published online in PLOS Digital Health.

LIMITATIONS:

The study focused on raw sleep measures; the researchers suggest that future studies evaluate additional sleep variables (eg, daytime naps), which have been associated with mental health in college students. In addition, the researchers did not have stress or sleep data before participants started college, so they could not assess the impact of starting college on participants’ sleep.

DISCLOSURES:

Bloomfield was supported by the Gund Fellowship and received a partial salary from the Mass Mutual Insurance Wellness Initiative. Other authors’ funding is reported in the original article.

A version of this article appeared on Medscape.com.

Living in a disadvantaged neighborhood is associated with accelerated brain aging and a higher risk for early dementia, regardless of income level or education, new research suggested.

Analysis of two datasets revealed that people living in the most disadvantaged neighborhoods had a more than 20% higher risk for dementia than those in other areas and measurably poorer brain health as early as age 45, regardless of their own personal income and education.

“If you want to prevent dementia and you’re not asking someone about their neighborhood, you’re missing information that’s important to know,” lead author Aaron Reuben, PhD, postdoctoral scholar in neuropsychology and environmental health at Duke University, Durham, North Carolina, said in a news release.

The study was published online in Alzheimer’s & Dementia.

Higher Risk in Men

Few interventions exist to halt or delay the progression of Alzheimer’s disease and related dementias (ADRD), which has increasingly led to a focus on primary prevention.

Although previous research pointed to a link between socioeconomically disadvantaged neighborhoods and a greater risk for cognitive deficits, mild cognitive impairment, dementia, and poor brain health, the timeline for the emergence of that risk is unknown.

To fill in the gaps, investigators studied data on all 1.4 million New Zealand residents, dividing neighborhoods into quintiles based on level of disadvantage (assessed by the New Zealand Index of Deprivation) to see whether dementia diagnoses followed neighborhood socioeconomic gradients.

After adjusting for covariates, they found that overall, those living in disadvantaged areas were slightly more likely to develop dementia across the 20-year study period (adjusted hazard ratio [HR], 1.09; 95% CI, 1.08-1.10).

The more disadvantaged the neighborhood, the higher the dementia risk, with a 43% higher risk for ADRD among those in the highest quintile than among those in the lowest quintile (HR, 1.43; 95% CI, 1.36-1.49).

The effect was larger in men than in women and in younger vs older individuals, with the youngest age group showing 21% greater risk in women and 26% greater risk in men vs the oldest age group.

Dementia Prevention Starts Early

Researchers then turned to the Dunedin Study, a cohort of 938 New Zealanders (50% female) followed from birth to age 45 to track their psychological, social, and physiological health with brain scans, memory tests, and cognitive self-assessments.

The analysis suggested that by age 45, those living in more disadvantaged neighborhoods across adulthood had accumulated a significantly greater number of midlife risk factors for later ADRD.

They also had worse structural brain integrity, with each standard deviation increase in neighborhood disadvantage resulting in a thinner cortex, greater white matter hyperintensities volume, and older brain age.

Those living in poorer areas had lower cognitive test scores, reported more issues with everyday cognitive function, and showed a greater reduction in IQ from childhood to midlife. Analysis of brain scans also revealed mean brain ages 2.98 years older than those living in the least disadvantaged areas (P = .001).

Limitations included the study’s observational design, which could not establish causation, and the fact that the researchers did not have access to individual-level socioeconomic information for the entire population. Additionally, brain-integrity measures in the Dunedin Study were largely cross-sectional.

“If you want to truly prevent dementia, you’ve got to start early because 20 years before anyone will get a diagnosis, we’re seeing dementia’s emergence,” Dr. Reuben said. “And it could be even earlier.”

Funding for the study was provided by the National Institutes for Health; UK Medical Research Council; Health Research Council of New Zealand; Brain Research New Zealand; New Zealand Ministry of Business, Innovation, & Employment; and the Duke University and the University of North Carolina Alzheimer’s Disease Research Center. The authors declared no relevant financial relationships.

A version of this article appeared on Medscape.com.

Living in a disadvantaged neighborhood is associated with accelerated brain aging and a higher risk for early dementia, regardless of income level or education, new research suggested.

Analysis of two datasets revealed that people living in the most disadvantaged neighborhoods had a more than 20% higher risk for dementia than those in other areas and measurably poorer brain health as early as age 45, regardless of their own personal income and education.

“If you want to prevent dementia and you’re not asking someone about their neighborhood, you’re missing information that’s important to know,” lead author Aaron Reuben, PhD, postdoctoral scholar in neuropsychology and environmental health at Duke University, Durham, North Carolina, said in a news release.

The study was published online in Alzheimer’s & Dementia.

Higher Risk in Men

Few interventions exist to halt or delay the progression of Alzheimer’s disease and related dementias (ADRD), which has increasingly led to a focus on primary prevention.

Although previous research pointed to a link between socioeconomically disadvantaged neighborhoods and a greater risk for cognitive deficits, mild cognitive impairment, dementia, and poor brain health, the timeline for the emergence of that risk is unknown.

To fill in the gaps, investigators studied data on all 1.4 million New Zealand residents, dividing neighborhoods into quintiles based on level of disadvantage (assessed by the New Zealand Index of Deprivation) to see whether dementia diagnoses followed neighborhood socioeconomic gradients.

After adjusting for covariates, they found that overall, those living in disadvantaged areas were slightly more likely to develop dementia across the 20-year study period (adjusted hazard ratio [HR], 1.09; 95% CI, 1.08-1.10).

The more disadvantaged the neighborhood, the higher the dementia risk, with a 43% higher risk for ADRD among those in the highest quintile than among those in the lowest quintile (HR, 1.43; 95% CI, 1.36-1.49).

The effect was larger in men than in women and in younger vs older individuals, with the youngest age group showing 21% greater risk in women and 26% greater risk in men vs the oldest age group.

Dementia Prevention Starts Early

Researchers then turned to the Dunedin Study, a cohort of 938 New Zealanders (50% female) followed from birth to age 45 to track their psychological, social, and physiological health with brain scans, memory tests, and cognitive self-assessments.

The analysis suggested that by age 45, those living in more disadvantaged neighborhoods across adulthood had accumulated a significantly greater number of midlife risk factors for later ADRD.

They also had worse structural brain integrity, with each standard deviation increase in neighborhood disadvantage resulting in a thinner cortex, greater white matter hyperintensities volume, and older brain age.

Those living in poorer areas had lower cognitive test scores, reported more issues with everyday cognitive function, and showed a greater reduction in IQ from childhood to midlife. Analysis of brain scans also revealed mean brain ages 2.98 years older than those living in the least disadvantaged areas (P = .001).

Limitations included the study’s observational design, which could not establish causation, and the fact that the researchers did not have access to individual-level socioeconomic information for the entire population. Additionally, brain-integrity measures in the Dunedin Study were largely cross-sectional.

“If you want to truly prevent dementia, you’ve got to start early because 20 years before anyone will get a diagnosis, we’re seeing dementia’s emergence,” Dr. Reuben said. “And it could be even earlier.”

Funding for the study was provided by the National Institutes for Health; UK Medical Research Council; Health Research Council of New Zealand; Brain Research New Zealand; New Zealand Ministry of Business, Innovation, & Employment; and the Duke University and the University of North Carolina Alzheimer’s Disease Research Center. The authors declared no relevant financial relationships.

A version of this article appeared on Medscape.com.

Living in a disadvantaged neighborhood is associated with accelerated brain aging and a higher risk for early dementia, regardless of income level or education, new research suggested.

Analysis of two datasets revealed that people living in the most disadvantaged neighborhoods had a more than 20% higher risk for dementia than those in other areas and measurably poorer brain health as early as age 45, regardless of their own personal income and education.

“If you want to prevent dementia and you’re not asking someone about their neighborhood, you’re missing information that’s important to know,” lead author Aaron Reuben, PhD, postdoctoral scholar in neuropsychology and environmental health at Duke University, Durham, North Carolina, said in a news release.

The study was published online in Alzheimer’s & Dementia.

Higher Risk in Men

Few interventions exist to halt or delay the progression of Alzheimer’s disease and related dementias (ADRD), which has increasingly led to a focus on primary prevention.

Although previous research pointed to a link between socioeconomically disadvantaged neighborhoods and a greater risk for cognitive deficits, mild cognitive impairment, dementia, and poor brain health, the timeline for the emergence of that risk is unknown.

To fill in the gaps, investigators studied data on all 1.4 million New Zealand residents, dividing neighborhoods into quintiles based on level of disadvantage (assessed by the New Zealand Index of Deprivation) to see whether dementia diagnoses followed neighborhood socioeconomic gradients.

After adjusting for covariates, they found that overall, those living in disadvantaged areas were slightly more likely to develop dementia across the 20-year study period (adjusted hazard ratio [HR], 1.09; 95% CI, 1.08-1.10).

The more disadvantaged the neighborhood, the higher the dementia risk, with a 43% higher risk for ADRD among those in the highest quintile than among those in the lowest quintile (HR, 1.43; 95% CI, 1.36-1.49).

The effect was larger in men than in women and in younger vs older individuals, with the youngest age group showing 21% greater risk in women and 26% greater risk in men vs the oldest age group.

Dementia Prevention Starts Early

Researchers then turned to the Dunedin Study, a cohort of 938 New Zealanders (50% female) followed from birth to age 45 to track their psychological, social, and physiological health with brain scans, memory tests, and cognitive self-assessments.

The analysis suggested that by age 45, those living in more disadvantaged neighborhoods across adulthood had accumulated a significantly greater number of midlife risk factors for later ADRD.

They also had worse structural brain integrity, with each standard deviation increase in neighborhood disadvantage resulting in a thinner cortex, greater white matter hyperintensities volume, and older brain age.

Those living in poorer areas had lower cognitive test scores, reported more issues with everyday cognitive function, and showed a greater reduction in IQ from childhood to midlife. Analysis of brain scans also revealed mean brain ages 2.98 years older than those living in the least disadvantaged areas (P = .001).

Limitations included the study’s observational design, which could not establish causation, and the fact that the researchers did not have access to individual-level socioeconomic information for the entire population. Additionally, brain-integrity measures in the Dunedin Study were largely cross-sectional.

“If you want to truly prevent dementia, you’ve got to start early because 20 years before anyone will get a diagnosis, we’re seeing dementia’s emergence,” Dr. Reuben said. “And it could be even earlier.”

Funding for the study was provided by the National Institutes for Health; UK Medical Research Council; Health Research Council of New Zealand; Brain Research New Zealand; New Zealand Ministry of Business, Innovation, & Employment; and the Duke University and the University of North Carolina Alzheimer’s Disease Research Center. The authors declared no relevant financial relationships.

A version of this article appeared on Medscape.com.

TOPLINE:

The use of stimulant therapy by adolescents with attention-deficit/hyperactivity disorder (ADHD) was not associated with later prescription drug misuse (PDM), a new study showed. However, misuse of prescription stimulants during adolescence was associated with significantly higher odds of later PDM.

METHODOLOGY:

• Data came from 11,066 participants in the ongoing Monitoring the Future panel study (baseline cohort years 2005-2017), a multicohort US national longitudinal study of adolescents followed into adulthood, in which procedures and measures are kept consistent across time.
• Participants (ages 17 and 18 years, 51.7% female, 11.2% Black, 15.7% Hispanic, and 59.6% White) completed self-administered questionnaires, with biennial follow-up during young adulthood (ages 19-24 years).
• The questionnaires asked about the number of occasions (if any) in which respondents used a prescription drug (benzodiazepine, opioid, or stimulant) on their own, without a physician’s order.
• Baseline covariates included sex, race, ethnicity, grade point average during high school, parental education, past 2-week binge drinking, past-month cigarette use, and past-year marijuana use, as well as demographic factors.

TAKEAWAY:

• Overall, 9.9% of participants reported lifetime stimulant therapy for ADHD, and 18.6% reported lifetime prescription stimulant misuse at baseline.
• Adolescents who received stimulant therapy for ADHD were less likely to report past-year prescription stimulant misuse as young adults compared with their same-age peers who did not receive stimulant therapy (adjusted odds ratio, 0.71; 95% CI, 0.52-0.99).
• The researchers found no significant differences between adolescents with or without lifetime stimulants in later incidence or prevalence of past-year PDM during young adulthood.
• The most robust predictor of prescription stimulant misuse during young adulthood was prescription stimulant misuse during adolescence; similarly, the most robust predictors of prescription opioid and prescription benzodiazepine misuse during young adulthood were prescription opioid and prescription benzodiazepine misuse (respectively) during adolescence.

IN PRACTICE:

“These findings amplify accumulating evidence suggesting that careful monitoring and screening during adolescence could identify individuals who are at relatively greater risk for PDM and need more comprehensive substance use assessment,” the authors wrote.

SOURCE:

Sean Esteban McCabe, PhD, professor and director, Center for the Study of Drugs, Alcohol, Smoking and Health, University of Michigan School of Nursing, Ann Arbor, was the lead and corresponding author of the study. It was published online on February 7 in Psychiatric Sciences.

LIMITATIONS:

Some subpopulations with higher rates of substance use, including youths who left school before completion and institutionalized populations, were excluded from the study, which may have led to an underestimation of PDM. Moreover, some potential confounders (eg, comorbid psychiatric conditions) were not assessed.

DISCLOSURES:

This study was supported by a research award from the US Food and Drug Administration and research awards from the National Institute on Drug Abuse of the NIH. Dr. McCabe reported no relevant financial relationships. The other authors’ disclosures are listed in the original paper.

A version of this article appeared on Medscape.com.

TOPLINE:

The use of stimulant therapy by adolescents with attention-deficit/hyperactivity disorder (ADHD) was not associated with later prescription drug misuse (PDM), a new study showed. However, misuse of prescription stimulants during adolescence was associated with significantly higher odds of later PDM.

METHODOLOGY:

• Data came from 11,066 participants in the ongoing Monitoring the Future panel study (baseline cohort years 2005-2017), a multicohort US national longitudinal study of adolescents followed into adulthood, in which procedures and measures are kept consistent across time.
• Participants (ages 17 and 18 years, 51.7% female, 11.2% Black, 15.7% Hispanic, and 59.6% White) completed self-administered questionnaires, with biennial follow-up during young adulthood (ages 19-24 years).
• The questionnaires asked about the number of occasions (if any) in which respondents used a prescription drug (benzodiazepine, opioid, or stimulant) on their own, without a physician’s order.
• Baseline covariates included sex, race, ethnicity, grade point average during high school, parental education, past 2-week binge drinking, past-month cigarette use, and past-year marijuana use, as well as demographic factors.

TAKEAWAY:

• Overall, 9.9% of participants reported lifetime stimulant therapy for ADHD, and 18.6% reported lifetime prescription stimulant misuse at baseline.
• Adolescents who received stimulant therapy for ADHD were less likely to report past-year prescription stimulant misuse as young adults compared with their same-age peers who did not receive stimulant therapy (adjusted odds ratio, 0.71; 95% CI, 0.52-0.99).
• The researchers found no significant differences between adolescents with or without lifetime stimulants in later incidence or prevalence of past-year PDM during young adulthood.
• The most robust predictor of prescription stimulant misuse during young adulthood was prescription stimulant misuse during adolescence; similarly, the most robust predictors of prescription opioid and prescription benzodiazepine misuse during young adulthood were prescription opioid and prescription benzodiazepine misuse (respectively) during adolescence.

IN PRACTICE:

“These findings amplify accumulating evidence suggesting that careful monitoring and screening during adolescence could identify individuals who are at relatively greater risk for PDM and need more comprehensive substance use assessment,” the authors wrote.

SOURCE:

Sean Esteban McCabe, PhD, professor and director, Center for the Study of Drugs, Alcohol, Smoking and Health, University of Michigan School of Nursing, Ann Arbor, was the lead and corresponding author of the study. It was published online on February 7 in Psychiatric Sciences.

LIMITATIONS:

Some subpopulations with higher rates of substance use, including youths who left school before completion and institutionalized populations, were excluded from the study, which may have led to an underestimation of PDM. Moreover, some potential confounders (eg, comorbid psychiatric conditions) were not assessed.

DISCLOSURES:

This study was supported by a research award from the US Food and Drug Administration and research awards from the National Institute on Drug Abuse of the NIH. Dr. McCabe reported no relevant financial relationships. The other authors’ disclosures are listed in the original paper.

A version of this article appeared on Medscape.com.

TOPLINE:

The use of stimulant therapy by adolescents with attention-deficit/hyperactivity disorder (ADHD) was not associated with later prescription drug misuse (PDM), a new study showed. However, misuse of prescription stimulants during adolescence was associated with significantly higher odds of later PDM.

METHODOLOGY:

• Data came from 11,066 participants in the ongoing Monitoring the Future panel study (baseline cohort years 2005-2017), a multicohort US national longitudinal study of adolescents followed into adulthood, in which procedures and measures are kept consistent across time.
• Participants (ages 17 and 18 years, 51.7% female, 11.2% Black, 15.7% Hispanic, and 59.6% White) completed self-administered questionnaires, with biennial follow-up during young adulthood (ages 19-24 years).
• The questionnaires asked about the number of occasions (if any) in which respondents used a prescription drug (benzodiazepine, opioid, or stimulant) on their own, without a physician’s order.
• Baseline covariates included sex, race, ethnicity, grade point average during high school, parental education, past 2-week binge drinking, past-month cigarette use, and past-year marijuana use, as well as demographic factors.

TAKEAWAY:

• Overall, 9.9% of participants reported lifetime stimulant therapy for ADHD, and 18.6% reported lifetime prescription stimulant misuse at baseline.
• Adolescents who received stimulant therapy for ADHD were less likely to report past-year prescription stimulant misuse as young adults compared with their same-age peers who did not receive stimulant therapy (adjusted odds ratio, 0.71; 95% CI, 0.52-0.99).
• The researchers found no significant differences between adolescents with or without lifetime stimulants in later incidence or prevalence of past-year PDM during young adulthood.
• The most robust predictor of prescription stimulant misuse during young adulthood was prescription stimulant misuse during adolescence; similarly, the most robust predictors of prescription opioid and prescription benzodiazepine misuse during young adulthood were prescription opioid and prescription benzodiazepine misuse (respectively) during adolescence.

IN PRACTICE:

“These findings amplify accumulating evidence suggesting that careful monitoring and screening during adolescence could identify individuals who are at relatively greater risk for PDM and need more comprehensive substance use assessment,” the authors wrote.

SOURCE:

Sean Esteban McCabe, PhD, professor and director, Center for the Study of Drugs, Alcohol, Smoking and Health, University of Michigan School of Nursing, Ann Arbor, was the lead and corresponding author of the study. It was published online on February 7 in Psychiatric Sciences.

LIMITATIONS:

Some subpopulations with higher rates of substance use, including youths who left school before completion and institutionalized populations, were excluded from the study, which may have led to an underestimation of PDM. Moreover, some potential confounders (eg, comorbid psychiatric conditions) were not assessed.

DISCLOSURES:

This study was supported by a research award from the US Food and Drug Administration and research awards from the National Institute on Drug Abuse of the NIH. Dr. McCabe reported no relevant financial relationships. The other authors’ disclosures are listed in the original paper.

A version of this article appeared on Medscape.com.

Transcranial photobiomodulation (tPBM), a noninvasive laser light therapy, can improve short-term memory in young adults when applied to the right prefrontal cortex (PFC) of the brain, new research suggests.

Investigators compared the effect of 1,064 nm of tPBM delivered over a 12-minute session to the right PFC vs. three other treatment arms: delivery of the same intervention to the left PFC, delivery of the intervention at a lower frequency, and a sham intervention.

All participants were shown a series of items prior to the intervention and  asked to recall them after the intervention. Those who received tPBM 1,064 nm to the right PFC showed a superior performance of up to 25% in the memory tasks compared with the other groups.

Patients with attention-related conditions, such as attention deficit hyperactivity disorder, “could benefit from this type of treatment, which is safe, simple, and noninvasive, with no side effects,” coinvestigator Dongwei Li, a visiting PhD student at the Centre for Human Brain Health, University of Birmingham, England, said in a news release.

The findings were published online in Science Advances.
 

Differing wavelengths

The researchers note that “in the past decades,” noninvasive brain stimulation technology using transcranial application of direct or alternating electrical or magnetic fields “has been proven to be useful” in the improvement of working memory (WM).

When applied to the right PFC, tPBM has been shown to improve accuracy and speed of reaction time in WM tasks and improvements in “high-order cognitive functions,” such as sustained attention, emotion, and executive functions.

The investigators wanted to assess the impact of tPBM applied to different parts of the brain and at different wavelengths. They conducted four double-blind, sham-controlled experiments encompassing 90 neurotypical college students (mean age, 22 years). Each student participated in only one of the four experiments.

All completed two different tPBM sessions, separated by a week, in which sham and active tPBM were compared. Two different types of change-detection memory tasks were given: one requiring participants to remember the orientation of a series of items before and after the intervention and one other requiring them to remember the color of the items (experiments 1 and 2).

A series of follow-up experiments focused on comparing different wavelengths (1,064 nm vs. 852 nm) and different stimulation sites (right vs. left PFC; experiments 3 and 4).

EEG recordings were obtained during the intervention and the memory tasks.

Each experiment consisted of one active tPBM session and one sham tPBM session, with sessions consisting of 12 minutes of laser light (or sham) intervention. These sessions were conducted on the first and the seventh day; then, on the eighth day, participants were asked to report (or guess) which session was the active tPBM session.
 

Stimulating astrocytes

Results showed that, compared with sham tPBM, there was an improvement in WM capacity and scores by the 1,064 nm intervention in the orientation as well as the color task.

Participants who received the targeted treatment were able to remember between four and five test objects, whereas those with the treatment variations were only able to remember between three and four objects.

“These results support the hypothesis that 1,064 nm tPBM on the right PFC enhances WM capacity,” the investigators wrote.

They also found improvements in WM in participants receiving tPBM vs. sham regardless of whether their performance in the WM task was at a low or high level. This finding held true in both the orientation and the color tasks.

“Therefore, participants with good and poor WM capacity improved after 1,064 nm tPBM,” the researchers noted.

In addition, participants were unable to guess or report whether they had received sham or active tPBM.

EEG monitoring showed changes in brain activity that predicted the improvements in memory performance. In particular, 1,064 tPBM applied to the right PFC increased occipitoparietal contralateral delay activity (CDA), with CDA mediating the WM improvement.

This is “consistent with previous research that CDA is indicative of the number of maintained objects in visual working memory,” the investigators wrote.

Pearson correlation analyses showed that the differences in CDA set-size effects between active and sham session “correlated positively” with the behavioral differences between these sessions. For the orientation task, the r was 0.446 (P < .04); and for the color task, the r was .563 (P < .02).

No similar improvements were found with the 852 nm tPBM.

“We need further research to understand exactly why the tPBM is having this positive effect,” coinvestigator Ole Jensen, PhD, professor in translational neuroscience and codirector of the Centre for Human Brain Health, said in the release.

“It’s possible that the light is stimulating the astrocytes – the powerplants – in the nerve cells within the PFC, and this has a positive effect on the cells’ efficiency,” he noted.

Dr. Jensen added that his team “will also be investigating how long the effects might last. Clearly, if these experiments are to lead to a clinical intervention, we will need to see long-lasting benefits.”
 

Beneficial cognitive, emotional effects

Commenting for this news organization, Francisco Gonzalez-Lima, PhD, professor in the department of psychology, University of Texas at Austin, called the study “well done.”

Dr. Gonzalez-Lima was one of the first researchers to demonstrate that 1,064 nm transcranial infrared laser stimulation “produces beneficial cognitive and emotional effects in humans, including improving visual working memory,” he said.

The current study “reported an additional brain effect linked to the improved visual working memory that consists of an EEG-derived response, which is a new finding,” noted Dr. Gonzales-Lima, who was not involved with the new research.

He added that the same laser method “has been found by the Gonzalez-Lima lab to be effective at improving cognition in older adults and depressed and bipolar patients.”

The study was supported by the National Natural Science Foundation of China, the Ministry of Science and Technology of the People’s Republic of China, and the National Defence Basic Scientific Research Program of China. The investigators and Dr. Gonzalez-Lima report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Transcranial photobiomodulation (tPBM), a noninvasive laser light therapy, can improve short-term memory in young adults when applied to the right prefrontal cortex (PFC) of the brain, new research suggests.

Investigators compared the effect of 1,064 nm of tPBM delivered over a 12-minute session to the right PFC vs. three other treatment arms: delivery of the same intervention to the left PFC, delivery of the intervention at a lower frequency, and a sham intervention.

All participants were shown a series of items prior to the intervention and  asked to recall them after the intervention. Those who received tPBM 1,064 nm to the right PFC showed a superior performance of up to 25% in the memory tasks compared with the other groups.

Patients with attention-related conditions, such as attention deficit hyperactivity disorder, “could benefit from this type of treatment, which is safe, simple, and noninvasive, with no side effects,” coinvestigator Dongwei Li, a visiting PhD student at the Centre for Human Brain Health, University of Birmingham, England, said in a news release.

The findings were published online in Science Advances.
 

Differing wavelengths

The researchers note that “in the past decades,” noninvasive brain stimulation technology using transcranial application of direct or alternating electrical or magnetic fields “has been proven to be useful” in the improvement of working memory (WM).

When applied to the right PFC, tPBM has been shown to improve accuracy and speed of reaction time in WM tasks and improvements in “high-order cognitive functions,” such as sustained attention, emotion, and executive functions.

The investigators wanted to assess the impact of tPBM applied to different parts of the brain and at different wavelengths. They conducted four double-blind, sham-controlled experiments encompassing 90 neurotypical college students (mean age, 22 years). Each student participated in only one of the four experiments.

All completed two different tPBM sessions, separated by a week, in which sham and active tPBM were compared. Two different types of change-detection memory tasks were given: one requiring participants to remember the orientation of a series of items before and after the intervention and one other requiring them to remember the color of the items (experiments 1 and 2).

A series of follow-up experiments focused on comparing different wavelengths (1,064 nm vs. 852 nm) and different stimulation sites (right vs. left PFC; experiments 3 and 4).

EEG recordings were obtained during the intervention and the memory tasks.

Each experiment consisted of one active tPBM session and one sham tPBM session, with sessions consisting of 12 minutes of laser light (or sham) intervention. These sessions were conducted on the first and the seventh day; then, on the eighth day, participants were asked to report (or guess) which session was the active tPBM session.
 

Stimulating astrocytes

Results showed that, compared with sham tPBM, there was an improvement in WM capacity and scores by the 1,064 nm intervention in the orientation as well as the color task.

Participants who received the targeted treatment were able to remember between four and five test objects, whereas those with the treatment variations were only able to remember between three and four objects.

“These results support the hypothesis that 1,064 nm tPBM on the right PFC enhances WM capacity,” the investigators wrote.

They also found improvements in WM in participants receiving tPBM vs. sham regardless of whether their performance in the WM task was at a low or high level. This finding held true in both the orientation and the color tasks.

“Therefore, participants with good and poor WM capacity improved after 1,064 nm tPBM,” the researchers noted.

In addition, participants were unable to guess or report whether they had received sham or active tPBM.

EEG monitoring showed changes in brain activity that predicted the improvements in memory performance. In particular, 1,064 tPBM applied to the right PFC increased occipitoparietal contralateral delay activity (CDA), with CDA mediating the WM improvement.

This is “consistent with previous research that CDA is indicative of the number of maintained objects in visual working memory,” the investigators wrote.

Pearson correlation analyses showed that the differences in CDA set-size effects between active and sham session “correlated positively” with the behavioral differences between these sessions. For the orientation task, the r was 0.446 (P < .04); and for the color task, the r was .563 (P < .02).

No similar improvements were found with the 852 nm tPBM.

“We need further research to understand exactly why the tPBM is having this positive effect,” coinvestigator Ole Jensen, PhD, professor in translational neuroscience and codirector of the Centre for Human Brain Health, said in the release.

“It’s possible that the light is stimulating the astrocytes – the powerplants – in the nerve cells within the PFC, and this has a positive effect on the cells’ efficiency,” he noted.

Dr. Jensen added that his team “will also be investigating how long the effects might last. Clearly, if these experiments are to lead to a clinical intervention, we will need to see long-lasting benefits.”
 

Beneficial cognitive, emotional effects

Commenting for this news organization, Francisco Gonzalez-Lima, PhD, professor in the department of psychology, University of Texas at Austin, called the study “well done.”

Dr. Gonzalez-Lima was one of the first researchers to demonstrate that 1,064 nm transcranial infrared laser stimulation “produces beneficial cognitive and emotional effects in humans, including improving visual working memory,” he said.

The current study “reported an additional brain effect linked to the improved visual working memory that consists of an EEG-derived response, which is a new finding,” noted Dr. Gonzales-Lima, who was not involved with the new research.

He added that the same laser method “has been found by the Gonzalez-Lima lab to be effective at improving cognition in older adults and depressed and bipolar patients.”

The study was supported by the National Natural Science Foundation of China, the Ministry of Science and Technology of the People’s Republic of China, and the National Defence Basic Scientific Research Program of China. The investigators and Dr. Gonzalez-Lima report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Transcranial photobiomodulation (tPBM), a noninvasive laser light therapy, can improve short-term memory in young adults when applied to the right prefrontal cortex (PFC) of the brain, new research suggests.

Investigators compared the effect of 1,064 nm of tPBM delivered over a 12-minute session to the right PFC vs. three other treatment arms: delivery of the same intervention to the left PFC, delivery of the intervention at a lower frequency, and a sham intervention.

All participants were shown a series of items prior to the intervention and  asked to recall them after the intervention. Those who received tPBM 1,064 nm to the right PFC showed a superior performance of up to 25% in the memory tasks compared with the other groups.

Patients with attention-related conditions, such as attention deficit hyperactivity disorder, “could benefit from this type of treatment, which is safe, simple, and noninvasive, with no side effects,” coinvestigator Dongwei Li, a visiting PhD student at the Centre for Human Brain Health, University of Birmingham, England, said in a news release.

The findings were published online in Science Advances.
 

Differing wavelengths

The researchers note that “in the past decades,” noninvasive brain stimulation technology using transcranial application of direct or alternating electrical or magnetic fields “has been proven to be useful” in the improvement of working memory (WM).

When applied to the right PFC, tPBM has been shown to improve accuracy and speed of reaction time in WM tasks and improvements in “high-order cognitive functions,” such as sustained attention, emotion, and executive functions.

The investigators wanted to assess the impact of tPBM applied to different parts of the brain and at different wavelengths. They conducted four double-blind, sham-controlled experiments encompassing 90 neurotypical college students (mean age, 22 years). Each student participated in only one of the four experiments.

All completed two different tPBM sessions, separated by a week, in which sham and active tPBM were compared. Two different types of change-detection memory tasks were given: one requiring participants to remember the orientation of a series of items before and after the intervention and one other requiring them to remember the color of the items (experiments 1 and 2).

A series of follow-up experiments focused on comparing different wavelengths (1,064 nm vs. 852 nm) and different stimulation sites (right vs. left PFC; experiments 3 and 4).

EEG recordings were obtained during the intervention and the memory tasks.

Each experiment consisted of one active tPBM session and one sham tPBM session, with sessions consisting of 12 minutes of laser light (or sham) intervention. These sessions were conducted on the first and the seventh day; then, on the eighth day, participants were asked to report (or guess) which session was the active tPBM session.
 

Stimulating astrocytes

Results showed that, compared with sham tPBM, there was an improvement in WM capacity and scores by the 1,064 nm intervention in the orientation as well as the color task.

Participants who received the targeted treatment were able to remember between four and five test objects, whereas those with the treatment variations were only able to remember between three and four objects.

“These results support the hypothesis that 1,064 nm tPBM on the right PFC enhances WM capacity,” the investigators wrote.

They also found improvements in WM in participants receiving tPBM vs. sham regardless of whether their performance in the WM task was at a low or high level. This finding held true in both the orientation and the color tasks.

“Therefore, participants with good and poor WM capacity improved after 1,064 nm tPBM,” the researchers noted.

In addition, participants were unable to guess or report whether they had received sham or active tPBM.

EEG monitoring showed changes in brain activity that predicted the improvements in memory performance. In particular, 1,064 tPBM applied to the right PFC increased occipitoparietal contralateral delay activity (CDA), with CDA mediating the WM improvement.

This is “consistent with previous research that CDA is indicative of the number of maintained objects in visual working memory,” the investigators wrote.

Pearson correlation analyses showed that the differences in CDA set-size effects between active and sham session “correlated positively” with the behavioral differences between these sessions. For the orientation task, the r was 0.446 (P < .04); and for the color task, the r was .563 (P < .02).

No similar improvements were found with the 852 nm tPBM.

“We need further research to understand exactly why the tPBM is having this positive effect,” coinvestigator Ole Jensen, PhD, professor in translational neuroscience and codirector of the Centre for Human Brain Health, said in the release.

“It’s possible that the light is stimulating the astrocytes – the powerplants – in the nerve cells within the PFC, and this has a positive effect on the cells’ efficiency,” he noted.

Dr. Jensen added that his team “will also be investigating how long the effects might last. Clearly, if these experiments are to lead to a clinical intervention, we will need to see long-lasting benefits.”
 

Beneficial cognitive, emotional effects

Commenting for this news organization, Francisco Gonzalez-Lima, PhD, professor in the department of psychology, University of Texas at Austin, called the study “well done.”

Dr. Gonzalez-Lima was one of the first researchers to demonstrate that 1,064 nm transcranial infrared laser stimulation “produces beneficial cognitive and emotional effects in humans, including improving visual working memory,” he said.

The current study “reported an additional brain effect linked to the improved visual working memory that consists of an EEG-derived response, which is a new finding,” noted Dr. Gonzales-Lima, who was not involved with the new research.

He added that the same laser method “has been found by the Gonzalez-Lima lab to be effective at improving cognition in older adults and depressed and bipolar patients.”

The study was supported by the National Natural Science Foundation of China, the Ministry of Science and Technology of the People’s Republic of China, and the National Defence Basic Scientific Research Program of China. The investigators and Dr. Gonzalez-Lima report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

This year Medscape surveyed more than 2,300 physicians about how they prioritized various social issues. Around half of them rated climate change among their five most important issues. Slightly lower percentages of doctors prioritized domestic violence and immigration/refugee policies that highly, and about 40% did so regarding reproductive rights in the United States.

Survey responses and comments left on the Physicians’ Views on Today’s Divisive Social Issues 2022 report provide insights into doctors’ attitudes and thinking about these four social challenges.
 

Relevance of climate change to health care

In the Medscape report, 61% of physicians described themselves as “very concerned” or “concerned” about climate change, and about 7 in 10 agreed with the statement that it should be a top worldwide priority. “Climate change is the most pressing issue of this century,” a psychiatrist respondent wrote.

What about direct effects on patients’ health? An internist worried that rising temperatures will cause “pathogens to spread and infect disadvantaged people who do not have health access and have immunocompromised conditions.” A family medicine physician predicted “more weather disasters, more asthma, more hormonal changes, and more obesity.”

However, physician viewpoints ran the gamut with an issue that has become politically and emotionally charged. Descriptions such as “overblown,” “hysteria,” “hoax,” and “farce” were used. “Climate change is a natural phenomenon under God’s purview,” an emergency medicine physician said.

And there was some middle-ground thinking. “It’s overstated but quite real,” a pediatrician respondent wrote. Added an ophthalmologist: “It has gone on for ages. We must work to decrease man-made conditions that affect climate change, but it must be done in an intelligent fashion.”
 

Domestic violence: What physicians can do

About 7 in 10 physicians surveyed by Medscape said they don’t think the United States is adequately tackling domestic violence. “It is underrecognized and ignored,” a psychiatrist respondent argued. The problem is “rampant and unacceptable, pushed into a closet and normalized, with associated shame,” an emergency medicine doctor wrote.

Many respondents noted that physicians are under a mandate to report abuse of or a suspicious injury to a patient. Some shared anecdotes about how they reported action they had taken when they suspected it. “I’ve told patients who may be in dangerous situations that I’m a safe person and provide a safe space,” a radiologist added. An internist said, “I’ve recently started to ask about safety at home during triage on every patient.”

Other doctors bemoaned a lack of adequate education on detecting and managing domestic violence and abuse. “Domestic violence is often not recognized by health care providers,” a psychiatrist respondent observed.
 

Expanding legal immigration

In the Medscape report, 34% of physicians felt U.S. immigration/refugee policies need to be tougher, while 28% said they are too restrictive, and about a fifth saw them as appropriate.

“As an immigrant, I can tell you that the system is flawed and needs a complete overhaul, which will take a bipartisan effort,” an endocrinologist respondent wrote.

A number of respondents argued that it’s critical to simplify the process of obtaining U.S. citizenship so that fewer will feel forced to enter the country illegally. “For a country that relies very heavily on immigrants to sustain our health care system, we behave like idiots in denying safe harbor,” a nephrologist asserted.

A neurologist concurred. “Legal immigration needs to be encouraged. It should be easier to exchange visitor or student visa to immigrant visa in order to retain talent in the health care and technology fields, which would alleviate the shortage of workers in health care.”
 

Reproductive rights: No easy answers

Medscape’s survey was conducted before the U.S. Supreme Court in June reversed Roe v. Wade. In the report, 71% of physicians described themselves as very to somewhat concerned about women’s reproductive rights, but their viewpoints became nuanced after that. “There is a big disparity among physicians on this topic,” an oncologist respondent wrote.

At one end of the spectrum, 3% of doctors felt that abortions should never be permitted. “The human baby in the womb is an independent person with the right to life,” a pathologist said. At the other end, nearly one-fourth of physicians believed abortion should be accessible under all circumstances, regardless of trimester or reason. “I am just here to support the woman and make her decision a reality,” an internist said.

While saying an abortion should be granted after “fetal viability” only “in extenuating circumstances,” an ob.gyn. respondent said she is “extremely concerned” about attacks on abortion rights. “Some of us are old enough to remember women coming to the ER in extremis after illegal procedures, prior to Roe v. Wade.”

A version of this article first appeared on Medscape.com.

This year Medscape surveyed more than 2,300 physicians about how they prioritized various social issues. Around half of them rated climate change among their five most important issues. Slightly lower percentages of doctors prioritized domestic violence and immigration/refugee policies that highly, and about 40% did so regarding reproductive rights in the United States.

Survey responses and comments left on the Physicians’ Views on Today’s Divisive Social Issues 2022 report provide insights into doctors’ attitudes and thinking about these four social challenges.
 

Relevance of climate change to health care

In the Medscape report, 61% of physicians described themselves as “very concerned” or “concerned” about climate change, and about 7 in 10 agreed with the statement that it should be a top worldwide priority. “Climate change is the most pressing issue of this century,” a psychiatrist respondent wrote.

What about direct effects on patients’ health? An internist worried that rising temperatures will cause “pathogens to spread and infect disadvantaged people who do not have health access and have immunocompromised conditions.” A family medicine physician predicted “more weather disasters, more asthma, more hormonal changes, and more obesity.”

However, physician viewpoints ran the gamut with an issue that has become politically and emotionally charged. Descriptions such as “overblown,” “hysteria,” “hoax,” and “farce” were used. “Climate change is a natural phenomenon under God’s purview,” an emergency medicine physician said.

And there was some middle-ground thinking. “It’s overstated but quite real,” a pediatrician respondent wrote. Added an ophthalmologist: “It has gone on for ages. We must work to decrease man-made conditions that affect climate change, but it must be done in an intelligent fashion.”
 

Domestic violence: What physicians can do

About 7 in 10 physicians surveyed by Medscape said they don’t think the United States is adequately tackling domestic violence. “It is underrecognized and ignored,” a psychiatrist respondent argued. The problem is “rampant and unacceptable, pushed into a closet and normalized, with associated shame,” an emergency medicine doctor wrote.

Many respondents noted that physicians are under a mandate to report abuse of or a suspicious injury to a patient. Some shared anecdotes about how they reported action they had taken when they suspected it. “I’ve told patients who may be in dangerous situations that I’m a safe person and provide a safe space,” a radiologist added. An internist said, “I’ve recently started to ask about safety at home during triage on every patient.”

Other doctors bemoaned a lack of adequate education on detecting and managing domestic violence and abuse. “Domestic violence is often not recognized by health care providers,” a psychiatrist respondent observed.
 

Expanding legal immigration

In the Medscape report, 34% of physicians felt U.S. immigration/refugee policies need to be tougher, while 28% said they are too restrictive, and about a fifth saw them as appropriate.

“As an immigrant, I can tell you that the system is flawed and needs a complete overhaul, which will take a bipartisan effort,” an endocrinologist respondent wrote.

A number of respondents argued that it’s critical to simplify the process of obtaining U.S. citizenship so that fewer will feel forced to enter the country illegally. “For a country that relies very heavily on immigrants to sustain our health care system, we behave like idiots in denying safe harbor,” a nephrologist asserted.

A neurologist concurred. “Legal immigration needs to be encouraged. It should be easier to exchange visitor or student visa to immigrant visa in order to retain talent in the health care and technology fields, which would alleviate the shortage of workers in health care.”
 

Reproductive rights: No easy answers

Medscape’s survey was conducted before the U.S. Supreme Court in June reversed Roe v. Wade. In the report, 71% of physicians described themselves as very to somewhat concerned about women’s reproductive rights, but their viewpoints became nuanced after that. “There is a big disparity among physicians on this topic,” an oncologist respondent wrote.

At one end of the spectrum, 3% of doctors felt that abortions should never be permitted. “The human baby in the womb is an independent person with the right to life,” a pathologist said. At the other end, nearly one-fourth of physicians believed abortion should be accessible under all circumstances, regardless of trimester or reason. “I am just here to support the woman and make her decision a reality,” an internist said.

While saying an abortion should be granted after “fetal viability” only “in extenuating circumstances,” an ob.gyn. respondent said she is “extremely concerned” about attacks on abortion rights. “Some of us are old enough to remember women coming to the ER in extremis after illegal procedures, prior to Roe v. Wade.”

A version of this article first appeared on Medscape.com.

This year Medscape surveyed more than 2,300 physicians about how they prioritized various social issues. Around half of them rated climate change among their five most important issues. Slightly lower percentages of doctors prioritized domestic violence and immigration/refugee policies that highly, and about 40% did so regarding reproductive rights in the United States.

Survey responses and comments left on the Physicians’ Views on Today’s Divisive Social Issues 2022 report provide insights into doctors’ attitudes and thinking about these four social challenges.
 

Relevance of climate change to health care

In the Medscape report, 61% of physicians described themselves as “very concerned” or “concerned” about climate change, and about 7 in 10 agreed with the statement that it should be a top worldwide priority. “Climate change is the most pressing issue of this century,” a psychiatrist respondent wrote.

What about direct effects on patients’ health? An internist worried that rising temperatures will cause “pathogens to spread and infect disadvantaged people who do not have health access and have immunocompromised conditions.” A family medicine physician predicted “more weather disasters, more asthma, more hormonal changes, and more obesity.”

However, physician viewpoints ran the gamut with an issue that has become politically and emotionally charged. Descriptions such as “overblown,” “hysteria,” “hoax,” and “farce” were used. “Climate change is a natural phenomenon under God’s purview,” an emergency medicine physician said.

And there was some middle-ground thinking. “It’s overstated but quite real,” a pediatrician respondent wrote. Added an ophthalmologist: “It has gone on for ages. We must work to decrease man-made conditions that affect climate change, but it must be done in an intelligent fashion.”
 

Domestic violence: What physicians can do

About 7 in 10 physicians surveyed by Medscape said they don’t think the United States is adequately tackling domestic violence. “It is underrecognized and ignored,” a psychiatrist respondent argued. The problem is “rampant and unacceptable, pushed into a closet and normalized, with associated shame,” an emergency medicine doctor wrote.

Many respondents noted that physicians are under a mandate to report abuse of or a suspicious injury to a patient. Some shared anecdotes about how they reported action they had taken when they suspected it. “I’ve told patients who may be in dangerous situations that I’m a safe person and provide a safe space,” a radiologist added. An internist said, “I’ve recently started to ask about safety at home during triage on every patient.”

Other doctors bemoaned a lack of adequate education on detecting and managing domestic violence and abuse. “Domestic violence is often not recognized by health care providers,” a psychiatrist respondent observed.
 

Expanding legal immigration

In the Medscape report, 34% of physicians felt U.S. immigration/refugee policies need to be tougher, while 28% said they are too restrictive, and about a fifth saw them as appropriate.

“As an immigrant, I can tell you that the system is flawed and needs a complete overhaul, which will take a bipartisan effort,” an endocrinologist respondent wrote.

A number of respondents argued that it’s critical to simplify the process of obtaining U.S. citizenship so that fewer will feel forced to enter the country illegally. “For a country that relies very heavily on immigrants to sustain our health care system, we behave like idiots in denying safe harbor,” a nephrologist asserted.

A neurologist concurred. “Legal immigration needs to be encouraged. It should be easier to exchange visitor or student visa to immigrant visa in order to retain talent in the health care and technology fields, which would alleviate the shortage of workers in health care.”
 

Reproductive rights: No easy answers

Medscape’s survey was conducted before the U.S. Supreme Court in June reversed Roe v. Wade. In the report, 71% of physicians described themselves as very to somewhat concerned about women’s reproductive rights, but their viewpoints became nuanced after that. “There is a big disparity among physicians on this topic,” an oncologist respondent wrote.

At one end of the spectrum, 3% of doctors felt that abortions should never be permitted. “The human baby in the womb is an independent person with the right to life,” a pathologist said. At the other end, nearly one-fourth of physicians believed abortion should be accessible under all circumstances, regardless of trimester or reason. “I am just here to support the woman and make her decision a reality,” an internist said.

While saying an abortion should be granted after “fetal viability” only “in extenuating circumstances,” an ob.gyn. respondent said she is “extremely concerned” about attacks on abortion rights. “Some of us are old enough to remember women coming to the ER in extremis after illegal procedures, prior to Roe v. Wade.”

A version of this article first appeared on Medscape.com.