Purushothaman Muthukanagaraj, MD

Psychotherapy is among the evidence-based treatment options for treating various psychiatric disorders. How we approach psychiatric disorders via psycho­therapy has been shaped by numerous theories of personality and psychopathology, including psychodynamic, behavioral, cognitive, systems, and existential-humanistic approaches. Whether used as primary treatment or in conjunction with medication, psychotherapy has played a pivotal role in shaping psychiatric disease management and treatment. Several evidence-based therapy modalities have been used throughout the years and continue to significantly improve and impact our patients’ lives. In the armamentarium of treatment modalities, therapy takes the leading role for several conditions. Here we review 4 studies from current psychotherapy literature; these studies are summarized in the Table.^1-4

1. Pompoli A, Furukawa TA, Efthimiou O, et al. Dismantling cognitive-behaviour therapy for panic disorder: a systematic review and component network meta-analysis. Psychol Med. 2018;48(12):1945-1953.

Panic disorder has a lifetime prevalence of 3.7% in the general population. Three treatment modalities recommended for patients with panic disorder are psychological therapy, pharmacologic therapy, and self-help. Among the psychological therapies, cognitive-behavioral therapy (CBT) is one of the most widely used.¹

Cognitive-behavioral therapy for panic disorder has been proven to be an efficacious and impactful treatment. For panic disorder, CBT may consist of different combinations of several therapeutic components, such as relaxation, breathing retraining, cognitive restructuring, interoceptive exposure, and/or in vivo exposure. It is therefore important, both theoretically and clinically, to examine whether specific components of CBT or their combinations are superior to others for treating panic disorder.¹

Pompoli et al¹ conducted a component network meta-analysis (NMA) of 72 studies in order to determine which CBT components were the most efficacious in treating patients with panic disorder. Component NMA is an extension of standard NMA; it is used to disentangle the treatment effects of different components included in composite interventions.¹

The aim of this study was to determine which specific component or combination of components was superior to others when treating panic disorder.¹

Study design

• Researchers reviewed 2,526 references from Medline, EMBASE, PsycINFO, and Cochrane Central and selected 72 studies that included 4,064 patients with panic disorder.¹
• The primary outcome was remission of panic disorder with or without agoraphobia in the short term (3 to 6 months). Remission was defined as achieving a score of ≤7 on the Panic Disorder Severity Scale (PDSS).¹
• Secondary outcomes included response (≥40% reduction in PDSS score from baseline) and dropout for any reason in the short term.¹

Continue to: Outcomes

Outcomes

• Using component NMA, researchers determined that interoceptive exposure and face-to-face setting (administration of therapeutic components in a face-to-face setting rather than through self-help means) led to better efficacy and acceptability. Muscle relaxation and virtual reality exposure corresponded to lower efficacy. Breathing retraining and in vivo exposure improved treatment acceptability, but had small effects on efficacy.¹
• Based on an analysis of remission rates, the most efficacious CBT incorporated cognitive restructuring and interoceptive exposure. The least efficacious CBT incorporated breathing retraining, muscle relaxation, in vivo exposure, and virtual reality exposure.¹
• Application of cognitive and behavioral therapeutic elements was superior to administration of behavioral elements alone. When administering CBT, face-to-face therapy led to better outcomes in response and remission rates. Dropout rates occurred at a lower frequency when CBT was administered face-to-face when compared with self-help groups. The placebo effect was associated with the highest dropout rate.¹

Conclusion

• Findings from this meta-analysis have high practical utility. Which CBT components are used can significantly alter CBT’s efficacy and acceptability in patients with panic disorder.¹
• The “most efficacious CBT” would include cognitive restructuring and interoceptive exposure delivered in a face-to-face setting. Breathing retraining, muscle relaxation, and virtual reality may have a minimal or even negative impact.¹
• Limitations of this meta-analysis include the high number of studies used for the data analysis, complex statistical analysis, inability to include unpublished studies, and limited relevant studies. A future implication of this study is the consideration of formal methodology based on the clinical application of efficacious CBT components when treating patients with panic disorder.¹

2. Sloan DM, Marx BP, Lee DJ, et al. A brief exposure-based treatment vs cognitive processing therapy for posttraumatic stress disorder: a randomized noninferiority clinical trial. JAMA Psychiatry. 2018;75(3):233-239.

Psychotherapy is also a useful modality for treating posttraumatic stress disorder (PTSD). Sloan et al² compared brief exposure-based treatment with cognitive processing therapy (CPT) for PTSD. 

Clinical practice guidelines for the management of PTSD and acute stress disorder recommend the use of individual, trauma-focused therapies that focus on exposure and cognitive restructuring, such as prolonged exposure, CPT, and written narrative exposure.⁵

Continue to: One type of written narrative...

One type of written narrative exposure treatment is written exposure therapy (WET), which consists of 5 sessions during which patients write about their trauma. The first session is comprised of psychoeducation about PTSD and a review of treatment reasoning, followed by 30 minutes of writing. The therapist provides feedback and instructions. Written exposure therapy requires less therapist training and less supervision than prolonged exposure or CPT. Prior studies have suggested that WET can significantly reduce PTSD symptoms in various trauma survivors.²

Although efficacious for PTSD, WET had not been compared with CPT, which is the most commonly used first-line treatment of PTSD. The aim of this study was to determine whether WET is noninferior to CPT.²

Study design

• In this randomized noninferiority clinical trial conducted in Boston, Massachusetts from February 28, 2013 to November 6, 2016, 126 veterans and non-veteran adults were randomized to WET or CPT. Participants met DSM-5 criteria for PTSD and were taking stable doses of their medications for at least 4 weeks.² 
• Participants assigned to CPT (n = 63) underwent 12 sessions, and participants assigned to WET (n = 63) received 5 sessions. Cognitive processing therapy was conducted over 60-minute weekly sessions. Written exposure therapy consisted of an initial session that was 60 minutes long and four 40-minute follow-up sessions.²
• Interviews were conducted by 4 independent evaluators at baseline and 6, 12, 24, and 36 weeks. During the WET sessions, participants wrote about a traumatic event while focusing on details, thoughts, and feelings associated with the event.²
• Cognitive processing therapy involved 12 trauma-focused therapy sessions during which participants learn how to become aware of and address problematic cognitions about the trauma as well as thoughts about themselves and others. Between sessions, participants were required to write 2 trauma accounts and complete other assignments.²

Outcomes

• The primary outcome was change in total score on the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5). The CAPS-5 scores for participants in the WET group were noninferior to those for participants in the CPT group at all assessment points.²
• Participants did not significantly differ in age, education, income, or PTSD severity. Participants in the 2 groups did not differ in treatment expectations or level of satisfaction with treatment. Individuals assigned to CPT were more likely to drop out of the study: 20 participants in the CPT group dropped out in the first 5 sessions, whereas only 4 dropped out of the WET group. The dropout rate in the CPT group was 39.7%. Improvements in PTSD symptoms in the WET group were noninferior to improvements in the CPT group.²
• Written exposure therapy showed no difference compared with CPT in decreasing PTSD symptoms. Furthermore, this study demonstrated that PTSD symptoms can decrease with a smaller number of shorter therapeutic sessions.²

Conclusion

• This study demonstrated noninferiority between an established, commonly used PTSD therapy (CPT) and a version of exposure therapy that is briefer, simpler, and requires less homework and less therapist training and expertise. This “lower-dose” approach may improve access for the expanding number of patients who require treatment for PTSD, especially in the Veterans Affairs system.²
• In summary, WET is well tolerated and time-efficient. Although it requires fewer sessions, WET was noninferior to CPT.²

Continue to: Multisystemic therapy versus management as usual...

3. Fonagy P, Butler S, Cottrell D, et al. Multisystemic therapy versus management as usual in the treatment of adolescent antisocial behaviour (START): a pragmatic, randomised controlled, superiority trial. Lancet Psychiatry. 2018;5(2):119-133.

Multisystemic therapy (MST) is an intensive, family-based, home-based intervention for young people with serious antisocial behavior. It has been found effective for childhood conduct disorders in the United States. However, previous studies that supported its efficacy were conducted by the therapy’s developers and used noncomprehensive comparators, such as individual therapy. Fonagy et al³ assessed the effectiveness and cost-effectiveness of MST vs management as usual for treating adolescent antisocial behavior. This is the first study that was performed by independent investigators and used a comprehensive control.³

Study design

• This 18-month, multisite, pragmatic, randomized controlled superiority trial was conducted in England.³
• Participants were age 11 to 17, with moderate to severe antisocial behavior. They had at least 3 severity criteria indicating difficulties across several settings and at least one of the 5 inclusion criteria for antisocial behavior. Six hundred eighty-four families were randomly assigned to MST or management as usual, and 491 families completed the study.³
• For the MST intervention, therapists worked with the adolescent’s caregiver 3 times a week for 3 to 5 months to improve parenting skills, enhance family relationships, increase support from social networks, develop skills and resources, address communication problems, increase school attendance and achievement, and reduce the adolescent’s association with delinquent peers.³
• For the management as usual intervention, management was based on local services for young people and was designed to be in line with current community practice.³

Outcomes

• The primary outcome was the proportion of participants in out-of-home placements at 18 months. The secondary outcomes were time to first criminal offense and the total number of offenses.³
• In terms of the risk of out-of-home placement, MST had no effect: 13% of participants in the MST group had out-of-home placement at 18 months, compared with 11% in the management-as-usual group.³
• Multisystemic therapy also did not significantly delay the time to first offense (hazard ratio, 1.06; 95% confidence interval, 0.84 to 1.33). Also, at 18-month follow-up, participants in the MST group had committed more offenses than those in the management-as-usual group, although the difference was not statistically significant.³
• Parents in the MST group reported increased parental support and involvement and reduced problems at 6 months, but the adolescents’ reports of parenting behavior indicated no significant effect for MST vs management as usual at any time point.³

Conclusion

• Multisystemic therapy was not superior to management as usual in reducing out-of-home placements. Although the parents believed that MST brought about a rapid and effective change, this was not reflected in objective indicators of antisocial behavior. These results are contrary to previous studies in the United States. The substantial improvements observed in both groups reflected the effectiveness of routinely offered interventions for this group of young people, at least when observed in clinical trials.³

Continue to: Mindfulness-based cognitive therapy...

4. Janssen L, Kan CC, Carpentier PJ, et al. Mindfulness-based cognitive therapy v. treatment as usual in adults with ADHD: a multicentre, single-blind, randomised controlled trial. Psychol Med. 2019;49(1):55-65.

There is empirical support for using psychotherapy to treat attention-deficit/hyperactivity disorder (ADHD). Although medication management plays a leading role in treating ADHD, Janssen et al⁴ conducted a multicenter, single-blind trial comparing mindfulness-based cognitive therapy (MBCT) vs treatment as usual (TAU) for ADHD.

The aim of this study was to determine the efficacy of MBCT plus TAU vs TAU only in decreasing symptoms of adults with ADHD.⁴

Study design

• This multicenter, single-blind randomized controlled trial was conducted in the Netherlands. Participants (N = 120) met criteria for ADHD and were age ≥18. Patients were randomly assigned to MBCT plus TAU (n = 60) or TAU only (n = 60). Patients in the MBCT plus TAU group received weekly group therapy sessions, meditation exercises, psychoeducation, and group discussions. Patients in the TAU-only group received pharmacotherapy and psychoeducation.⁴ 
• Blinded clinicians used the Connors’ Adult ADHD Rating Scale to assess ADHD symptoms.⁴
• Secondary outcomes were determined by self-reported questionnaires that patients completed online.⁴
• All statistical analyses were performed on an intention-to-treat sample as well as the per protocol sample.⁴

Outcomes

• The primary outcome was ADHD symptoms rated by clinicians. Secondary outcomes included self-reported ADHD symptoms, executive functioning, mindfulness skills, positive mental health, and general functioning. Outcomes were examined at baseline and then at post treatment and 3- and 6-month follow-up.⁴
• Patients in the MBCT plus TAU group had a significant decrease in clinician-rated ADHD symptoms that was maintained at 6-month follow-up. More patients in the MBCT plus TAU group (27%) vs patients in the TAU group (4%) showed a ≥30% reduction in ADHD symptoms. Compared with patients in the TAU group, patients in the MBCT plus TAU group had significant improvements in ADHD symptoms, mindfulness skills, and positive mental health at post treatment and at 6-month follow-up. Compared with those receiving TAU only, patients treated with MBCT plus TAU reported no improvement in executive functioning at post treatment, but did improve at 6-month follow-up.⁴

Continue to: Conclusion

Conclusion

• Compared with TAU only, MBCT plus TAU is more effective in reducing ADHD symptoms, with a lasting effect at 6-month follow-up. In terms of secondary outcomes, MBCT plus TAU proved to be effective in improving mindfulness, self-compassion, positive mental health, and executive functioning. The results of this trial demonstrate that psychosocial treatments can be effective in addition to TAU in patients with ADHD, and MBCT holds promise for adult ADHD.⁴

Psychotherapy is among the evidence-based treatment options for treating various psychiatric disorders. How we approach psychiatric disorders via psycho­therapy has been shaped by numerous theories of personality and psychopathology, including psychodynamic, behavioral, cognitive, systems, and existential-humanistic approaches. Whether used as primary treatment or in conjunction with medication, psychotherapy has played a pivotal role in shaping psychiatric disease management and treatment. Several evidence-based therapy modalities have been used throughout the years and continue to significantly improve and impact our patients’ lives. In the armamentarium of treatment modalities, therapy takes the leading role for several conditions. Here we review 4 studies from current psychotherapy literature; these studies are summarized in the Table.^1-4

1. Pompoli A, Furukawa TA, Efthimiou O, et al. Dismantling cognitive-behaviour therapy for panic disorder: a systematic review and component network meta-analysis. Psychol Med. 2018;48(12):1945-1953.

Panic disorder has a lifetime prevalence of 3.7% in the general population. Three treatment modalities recommended for patients with panic disorder are psychological therapy, pharmacologic therapy, and self-help. Among the psychological therapies, cognitive-behavioral therapy (CBT) is one of the most widely used.¹

Cognitive-behavioral therapy for panic disorder has been proven to be an efficacious and impactful treatment. For panic disorder, CBT may consist of different combinations of several therapeutic components, such as relaxation, breathing retraining, cognitive restructuring, interoceptive exposure, and/or in vivo exposure. It is therefore important, both theoretically and clinically, to examine whether specific components of CBT or their combinations are superior to others for treating panic disorder.¹

Pompoli et al¹ conducted a component network meta-analysis (NMA) of 72 studies in order to determine which CBT components were the most efficacious in treating patients with panic disorder. Component NMA is an extension of standard NMA; it is used to disentangle the treatment effects of different components included in composite interventions.¹

The aim of this study was to determine which specific component or combination of components was superior to others when treating panic disorder.¹

Study design

• Researchers reviewed 2,526 references from Medline, EMBASE, PsycINFO, and Cochrane Central and selected 72 studies that included 4,064 patients with panic disorder.¹
• The primary outcome was remission of panic disorder with or without agoraphobia in the short term (3 to 6 months). Remission was defined as achieving a score of ≤7 on the Panic Disorder Severity Scale (PDSS).¹
• Secondary outcomes included response (≥40% reduction in PDSS score from baseline) and dropout for any reason in the short term.¹

Continue to: Outcomes

Outcomes

• Using component NMA, researchers determined that interoceptive exposure and face-to-face setting (administration of therapeutic components in a face-to-face setting rather than through self-help means) led to better efficacy and acceptability. Muscle relaxation and virtual reality exposure corresponded to lower efficacy. Breathing retraining and in vivo exposure improved treatment acceptability, but had small effects on efficacy.¹
• Based on an analysis of remission rates, the most efficacious CBT incorporated cognitive restructuring and interoceptive exposure. The least efficacious CBT incorporated breathing retraining, muscle relaxation, in vivo exposure, and virtual reality exposure.¹
• Application of cognitive and behavioral therapeutic elements was superior to administration of behavioral elements alone. When administering CBT, face-to-face therapy led to better outcomes in response and remission rates. Dropout rates occurred at a lower frequency when CBT was administered face-to-face when compared with self-help groups. The placebo effect was associated with the highest dropout rate.¹

Conclusion

• Findings from this meta-analysis have high practical utility. Which CBT components are used can significantly alter CBT’s efficacy and acceptability in patients with panic disorder.¹
• The “most efficacious CBT” would include cognitive restructuring and interoceptive exposure delivered in a face-to-face setting. Breathing retraining, muscle relaxation, and virtual reality may have a minimal or even negative impact.¹
• Limitations of this meta-analysis include the high number of studies used for the data analysis, complex statistical analysis, inability to include unpublished studies, and limited relevant studies. A future implication of this study is the consideration of formal methodology based on the clinical application of efficacious CBT components when treating patients with panic disorder.¹

2. Sloan DM, Marx BP, Lee DJ, et al. A brief exposure-based treatment vs cognitive processing therapy for posttraumatic stress disorder: a randomized noninferiority clinical trial. JAMA Psychiatry. 2018;75(3):233-239.

Psychotherapy is also a useful modality for treating posttraumatic stress disorder (PTSD). Sloan et al² compared brief exposure-based treatment with cognitive processing therapy (CPT) for PTSD. 

Clinical practice guidelines for the management of PTSD and acute stress disorder recommend the use of individual, trauma-focused therapies that focus on exposure and cognitive restructuring, such as prolonged exposure, CPT, and written narrative exposure.⁵

Continue to: One type of written narrative...

One type of written narrative exposure treatment is written exposure therapy (WET), which consists of 5 sessions during which patients write about their trauma. The first session is comprised of psychoeducation about PTSD and a review of treatment reasoning, followed by 30 minutes of writing. The therapist provides feedback and instructions. Written exposure therapy requires less therapist training and less supervision than prolonged exposure or CPT. Prior studies have suggested that WET can significantly reduce PTSD symptoms in various trauma survivors.²

Although efficacious for PTSD, WET had not been compared with CPT, which is the most commonly used first-line treatment of PTSD. The aim of this study was to determine whether WET is noninferior to CPT.²

Study design

• In this randomized noninferiority clinical trial conducted in Boston, Massachusetts from February 28, 2013 to November 6, 2016, 126 veterans and non-veteran adults were randomized to WET or CPT. Participants met DSM-5 criteria for PTSD and were taking stable doses of their medications for at least 4 weeks.² 
• Participants assigned to CPT (n = 63) underwent 12 sessions, and participants assigned to WET (n = 63) received 5 sessions. Cognitive processing therapy was conducted over 60-minute weekly sessions. Written exposure therapy consisted of an initial session that was 60 minutes long and four 40-minute follow-up sessions.²
• Interviews were conducted by 4 independent evaluators at baseline and 6, 12, 24, and 36 weeks. During the WET sessions, participants wrote about a traumatic event while focusing on details, thoughts, and feelings associated with the event.²
• Cognitive processing therapy involved 12 trauma-focused therapy sessions during which participants learn how to become aware of and address problematic cognitions about the trauma as well as thoughts about themselves and others. Between sessions, participants were required to write 2 trauma accounts and complete other assignments.²

Outcomes

• The primary outcome was change in total score on the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5). The CAPS-5 scores for participants in the WET group were noninferior to those for participants in the CPT group at all assessment points.²
• Participants did not significantly differ in age, education, income, or PTSD severity. Participants in the 2 groups did not differ in treatment expectations or level of satisfaction with treatment. Individuals assigned to CPT were more likely to drop out of the study: 20 participants in the CPT group dropped out in the first 5 sessions, whereas only 4 dropped out of the WET group. The dropout rate in the CPT group was 39.7%. Improvements in PTSD symptoms in the WET group were noninferior to improvements in the CPT group.²
• Written exposure therapy showed no difference compared with CPT in decreasing PTSD symptoms. Furthermore, this study demonstrated that PTSD symptoms can decrease with a smaller number of shorter therapeutic sessions.²

Conclusion

• This study demonstrated noninferiority between an established, commonly used PTSD therapy (CPT) and a version of exposure therapy that is briefer, simpler, and requires less homework and less therapist training and expertise. This “lower-dose” approach may improve access for the expanding number of patients who require treatment for PTSD, especially in the Veterans Affairs system.²
• In summary, WET is well tolerated and time-efficient. Although it requires fewer sessions, WET was noninferior to CPT.²

Continue to: Multisystemic therapy versus management as usual...

3. Fonagy P, Butler S, Cottrell D, et al. Multisystemic therapy versus management as usual in the treatment of adolescent antisocial behaviour (START): a pragmatic, randomised controlled, superiority trial. Lancet Psychiatry. 2018;5(2):119-133.

Multisystemic therapy (MST) is an intensive, family-based, home-based intervention for young people with serious antisocial behavior. It has been found effective for childhood conduct disorders in the United States. However, previous studies that supported its efficacy were conducted by the therapy’s developers and used noncomprehensive comparators, such as individual therapy. Fonagy et al³ assessed the effectiveness and cost-effectiveness of MST vs management as usual for treating adolescent antisocial behavior. This is the first study that was performed by independent investigators and used a comprehensive control.³

Study design

• This 18-month, multisite, pragmatic, randomized controlled superiority trial was conducted in England.³
• Participants were age 11 to 17, with moderate to severe antisocial behavior. They had at least 3 severity criteria indicating difficulties across several settings and at least one of the 5 inclusion criteria for antisocial behavior. Six hundred eighty-four families were randomly assigned to MST or management as usual, and 491 families completed the study.³
• For the MST intervention, therapists worked with the adolescent’s caregiver 3 times a week for 3 to 5 months to improve parenting skills, enhance family relationships, increase support from social networks, develop skills and resources, address communication problems, increase school attendance and achievement, and reduce the adolescent’s association with delinquent peers.³
• For the management as usual intervention, management was based on local services for young people and was designed to be in line with current community practice.³

Outcomes

• The primary outcome was the proportion of participants in out-of-home placements at 18 months. The secondary outcomes were time to first criminal offense and the total number of offenses.³
• In terms of the risk of out-of-home placement, MST had no effect: 13% of participants in the MST group had out-of-home placement at 18 months, compared with 11% in the management-as-usual group.³
• Multisystemic therapy also did not significantly delay the time to first offense (hazard ratio, 1.06; 95% confidence interval, 0.84 to 1.33). Also, at 18-month follow-up, participants in the MST group had committed more offenses than those in the management-as-usual group, although the difference was not statistically significant.³
• Parents in the MST group reported increased parental support and involvement and reduced problems at 6 months, but the adolescents’ reports of parenting behavior indicated no significant effect for MST vs management as usual at any time point.³

Conclusion

• Multisystemic therapy was not superior to management as usual in reducing out-of-home placements. Although the parents believed that MST brought about a rapid and effective change, this was not reflected in objective indicators of antisocial behavior. These results are contrary to previous studies in the United States. The substantial improvements observed in both groups reflected the effectiveness of routinely offered interventions for this group of young people, at least when observed in clinical trials.³

Continue to: Mindfulness-based cognitive therapy...

4. Janssen L, Kan CC, Carpentier PJ, et al. Mindfulness-based cognitive therapy v. treatment as usual in adults with ADHD: a multicentre, single-blind, randomised controlled trial. Psychol Med. 2019;49(1):55-65.

There is empirical support for using psychotherapy to treat attention-deficit/hyperactivity disorder (ADHD). Although medication management plays a leading role in treating ADHD, Janssen et al⁴ conducted a multicenter, single-blind trial comparing mindfulness-based cognitive therapy (MBCT) vs treatment as usual (TAU) for ADHD.

The aim of this study was to determine the efficacy of MBCT plus TAU vs TAU only in decreasing symptoms of adults with ADHD.⁴

Study design

• This multicenter, single-blind randomized controlled trial was conducted in the Netherlands. Participants (N = 120) met criteria for ADHD and were age ≥18. Patients were randomly assigned to MBCT plus TAU (n = 60) or TAU only (n = 60). Patients in the MBCT plus TAU group received weekly group therapy sessions, meditation exercises, psychoeducation, and group discussions. Patients in the TAU-only group received pharmacotherapy and psychoeducation.⁴ 
• Blinded clinicians used the Connors’ Adult ADHD Rating Scale to assess ADHD symptoms.⁴
• Secondary outcomes were determined by self-reported questionnaires that patients completed online.⁴
• All statistical analyses were performed on an intention-to-treat sample as well as the per protocol sample.⁴

Outcomes

• The primary outcome was ADHD symptoms rated by clinicians. Secondary outcomes included self-reported ADHD symptoms, executive functioning, mindfulness skills, positive mental health, and general functioning. Outcomes were examined at baseline and then at post treatment and 3- and 6-month follow-up.⁴
• Patients in the MBCT plus TAU group had a significant decrease in clinician-rated ADHD symptoms that was maintained at 6-month follow-up. More patients in the MBCT plus TAU group (27%) vs patients in the TAU group (4%) showed a ≥30% reduction in ADHD symptoms. Compared with patients in the TAU group, patients in the MBCT plus TAU group had significant improvements in ADHD symptoms, mindfulness skills, and positive mental health at post treatment and at 6-month follow-up. Compared with those receiving TAU only, patients treated with MBCT plus TAU reported no improvement in executive functioning at post treatment, but did improve at 6-month follow-up.⁴

Continue to: Conclusion

Conclusion

• Compared with TAU only, MBCT plus TAU is more effective in reducing ADHD symptoms, with a lasting effect at 6-month follow-up. In terms of secondary outcomes, MBCT plus TAU proved to be effective in improving mindfulness, self-compassion, positive mental health, and executive functioning. The results of this trial demonstrate that psychosocial treatments can be effective in addition to TAU in patients with ADHD, and MBCT holds promise for adult ADHD.⁴

Psychotherapy is among the evidence-based treatment options for treating various psychiatric disorders. How we approach psychiatric disorders via psycho­therapy has been shaped by numerous theories of personality and psychopathology, including psychodynamic, behavioral, cognitive, systems, and existential-humanistic approaches. Whether used as primary treatment or in conjunction with medication, psychotherapy has played a pivotal role in shaping psychiatric disease management and treatment. Several evidence-based therapy modalities have been used throughout the years and continue to significantly improve and impact our patients’ lives. In the armamentarium of treatment modalities, therapy takes the leading role for several conditions. Here we review 4 studies from current psychotherapy literature; these studies are summarized in the Table.^1-4

1. Pompoli A, Furukawa TA, Efthimiou O, et al. Dismantling cognitive-behaviour therapy for panic disorder: a systematic review and component network meta-analysis. Psychol Med. 2018;48(12):1945-1953.

Panic disorder has a lifetime prevalence of 3.7% in the general population. Three treatment modalities recommended for patients with panic disorder are psychological therapy, pharmacologic therapy, and self-help. Among the psychological therapies, cognitive-behavioral therapy (CBT) is one of the most widely used.¹

Cognitive-behavioral therapy for panic disorder has been proven to be an efficacious and impactful treatment. For panic disorder, CBT may consist of different combinations of several therapeutic components, such as relaxation, breathing retraining, cognitive restructuring, interoceptive exposure, and/or in vivo exposure. It is therefore important, both theoretically and clinically, to examine whether specific components of CBT or their combinations are superior to others for treating panic disorder.¹

Pompoli et al¹ conducted a component network meta-analysis (NMA) of 72 studies in order to determine which CBT components were the most efficacious in treating patients with panic disorder. Component NMA is an extension of standard NMA; it is used to disentangle the treatment effects of different components included in composite interventions.¹

The aim of this study was to determine which specific component or combination of components was superior to others when treating panic disorder.¹

Study design

• Researchers reviewed 2,526 references from Medline, EMBASE, PsycINFO, and Cochrane Central and selected 72 studies that included 4,064 patients with panic disorder.¹
• The primary outcome was remission of panic disorder with or without agoraphobia in the short term (3 to 6 months). Remission was defined as achieving a score of ≤7 on the Panic Disorder Severity Scale (PDSS).¹
• Secondary outcomes included response (≥40% reduction in PDSS score from baseline) and dropout for any reason in the short term.¹

Continue to: Outcomes

Outcomes

• Using component NMA, researchers determined that interoceptive exposure and face-to-face setting (administration of therapeutic components in a face-to-face setting rather than through self-help means) led to better efficacy and acceptability. Muscle relaxation and virtual reality exposure corresponded to lower efficacy. Breathing retraining and in vivo exposure improved treatment acceptability, but had small effects on efficacy.¹
• Based on an analysis of remission rates, the most efficacious CBT incorporated cognitive restructuring and interoceptive exposure. The least efficacious CBT incorporated breathing retraining, muscle relaxation, in vivo exposure, and virtual reality exposure.¹
• Application of cognitive and behavioral therapeutic elements was superior to administration of behavioral elements alone. When administering CBT, face-to-face therapy led to better outcomes in response and remission rates. Dropout rates occurred at a lower frequency when CBT was administered face-to-face when compared with self-help groups. The placebo effect was associated with the highest dropout rate.¹

Conclusion

• Findings from this meta-analysis have high practical utility. Which CBT components are used can significantly alter CBT’s efficacy and acceptability in patients with panic disorder.¹
• The “most efficacious CBT” would include cognitive restructuring and interoceptive exposure delivered in a face-to-face setting. Breathing retraining, muscle relaxation, and virtual reality may have a minimal or even negative impact.¹
• Limitations of this meta-analysis include the high number of studies used for the data analysis, complex statistical analysis, inability to include unpublished studies, and limited relevant studies. A future implication of this study is the consideration of formal methodology based on the clinical application of efficacious CBT components when treating patients with panic disorder.¹

2. Sloan DM, Marx BP, Lee DJ, et al. A brief exposure-based treatment vs cognitive processing therapy for posttraumatic stress disorder: a randomized noninferiority clinical trial. JAMA Psychiatry. 2018;75(3):233-239.

Psychotherapy is also a useful modality for treating posttraumatic stress disorder (PTSD). Sloan et al² compared brief exposure-based treatment with cognitive processing therapy (CPT) for PTSD. 

Clinical practice guidelines for the management of PTSD and acute stress disorder recommend the use of individual, trauma-focused therapies that focus on exposure and cognitive restructuring, such as prolonged exposure, CPT, and written narrative exposure.⁵

Continue to: One type of written narrative...

One type of written narrative exposure treatment is written exposure therapy (WET), which consists of 5 sessions during which patients write about their trauma. The first session is comprised of psychoeducation about PTSD and a review of treatment reasoning, followed by 30 minutes of writing. The therapist provides feedback and instructions. Written exposure therapy requires less therapist training and less supervision than prolonged exposure or CPT. Prior studies have suggested that WET can significantly reduce PTSD symptoms in various trauma survivors.²

Although efficacious for PTSD, WET had not been compared with CPT, which is the most commonly used first-line treatment of PTSD. The aim of this study was to determine whether WET is noninferior to CPT.²

Study design

• In this randomized noninferiority clinical trial conducted in Boston, Massachusetts from February 28, 2013 to November 6, 2016, 126 veterans and non-veteran adults were randomized to WET or CPT. Participants met DSM-5 criteria for PTSD and were taking stable doses of their medications for at least 4 weeks.² 
• Participants assigned to CPT (n = 63) underwent 12 sessions, and participants assigned to WET (n = 63) received 5 sessions. Cognitive processing therapy was conducted over 60-minute weekly sessions. Written exposure therapy consisted of an initial session that was 60 minutes long and four 40-minute follow-up sessions.²
• Interviews were conducted by 4 independent evaluators at baseline and 6, 12, 24, and 36 weeks. During the WET sessions, participants wrote about a traumatic event while focusing on details, thoughts, and feelings associated with the event.²
• Cognitive processing therapy involved 12 trauma-focused therapy sessions during which participants learn how to become aware of and address problematic cognitions about the trauma as well as thoughts about themselves and others. Between sessions, participants were required to write 2 trauma accounts and complete other assignments.²

Outcomes

• The primary outcome was change in total score on the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5). The CAPS-5 scores for participants in the WET group were noninferior to those for participants in the CPT group at all assessment points.²
• Participants did not significantly differ in age, education, income, or PTSD severity. Participants in the 2 groups did not differ in treatment expectations or level of satisfaction with treatment. Individuals assigned to CPT were more likely to drop out of the study: 20 participants in the CPT group dropped out in the first 5 sessions, whereas only 4 dropped out of the WET group. The dropout rate in the CPT group was 39.7%. Improvements in PTSD symptoms in the WET group were noninferior to improvements in the CPT group.²
• Written exposure therapy showed no difference compared with CPT in decreasing PTSD symptoms. Furthermore, this study demonstrated that PTSD symptoms can decrease with a smaller number of shorter therapeutic sessions.²

Conclusion

• This study demonstrated noninferiority between an established, commonly used PTSD therapy (CPT) and a version of exposure therapy that is briefer, simpler, and requires less homework and less therapist training and expertise. This “lower-dose” approach may improve access for the expanding number of patients who require treatment for PTSD, especially in the Veterans Affairs system.²
• In summary, WET is well tolerated and time-efficient. Although it requires fewer sessions, WET was noninferior to CPT.²

Continue to: Multisystemic therapy versus management as usual...

3. Fonagy P, Butler S, Cottrell D, et al. Multisystemic therapy versus management as usual in the treatment of adolescent antisocial behaviour (START): a pragmatic, randomised controlled, superiority trial. Lancet Psychiatry. 2018;5(2):119-133.

Multisystemic therapy (MST) is an intensive, family-based, home-based intervention for young people with serious antisocial behavior. It has been found effective for childhood conduct disorders in the United States. However, previous studies that supported its efficacy were conducted by the therapy’s developers and used noncomprehensive comparators, such as individual therapy. Fonagy et al³ assessed the effectiveness and cost-effectiveness of MST vs management as usual for treating adolescent antisocial behavior. This is the first study that was performed by independent investigators and used a comprehensive control.³

Study design

• This 18-month, multisite, pragmatic, randomized controlled superiority trial was conducted in England.³
• Participants were age 11 to 17, with moderate to severe antisocial behavior. They had at least 3 severity criteria indicating difficulties across several settings and at least one of the 5 inclusion criteria for antisocial behavior. Six hundred eighty-four families were randomly assigned to MST or management as usual, and 491 families completed the study.³
• For the MST intervention, therapists worked with the adolescent’s caregiver 3 times a week for 3 to 5 months to improve parenting skills, enhance family relationships, increase support from social networks, develop skills and resources, address communication problems, increase school attendance and achievement, and reduce the adolescent’s association with delinquent peers.³
• For the management as usual intervention, management was based on local services for young people and was designed to be in line with current community practice.³

Outcomes

• The primary outcome was the proportion of participants in out-of-home placements at 18 months. The secondary outcomes were time to first criminal offense and the total number of offenses.³
• In terms of the risk of out-of-home placement, MST had no effect: 13% of participants in the MST group had out-of-home placement at 18 months, compared with 11% in the management-as-usual group.³
• Multisystemic therapy also did not significantly delay the time to first offense (hazard ratio, 1.06; 95% confidence interval, 0.84 to 1.33). Also, at 18-month follow-up, participants in the MST group had committed more offenses than those in the management-as-usual group, although the difference was not statistically significant.³
• Parents in the MST group reported increased parental support and involvement and reduced problems at 6 months, but the adolescents’ reports of parenting behavior indicated no significant effect for MST vs management as usual at any time point.³

Conclusion

• Multisystemic therapy was not superior to management as usual in reducing out-of-home placements. Although the parents believed that MST brought about a rapid and effective change, this was not reflected in objective indicators of antisocial behavior. These results are contrary to previous studies in the United States. The substantial improvements observed in both groups reflected the effectiveness of routinely offered interventions for this group of young people, at least when observed in clinical trials.³

Continue to: Mindfulness-based cognitive therapy...

4. Janssen L, Kan CC, Carpentier PJ, et al. Mindfulness-based cognitive therapy v. treatment as usual in adults with ADHD: a multicentre, single-blind, randomised controlled trial. Psychol Med. 2019;49(1):55-65.

There is empirical support for using psychotherapy to treat attention-deficit/hyperactivity disorder (ADHD). Although medication management plays a leading role in treating ADHD, Janssen et al⁴ conducted a multicenter, single-blind trial comparing mindfulness-based cognitive therapy (MBCT) vs treatment as usual (TAU) for ADHD.

The aim of this study was to determine the efficacy of MBCT plus TAU vs TAU only in decreasing symptoms of adults with ADHD.⁴

Study design

• This multicenter, single-blind randomized controlled trial was conducted in the Netherlands. Participants (N = 120) met criteria for ADHD and were age ≥18. Patients were randomly assigned to MBCT plus TAU (n = 60) or TAU only (n = 60). Patients in the MBCT plus TAU group received weekly group therapy sessions, meditation exercises, psychoeducation, and group discussions. Patients in the TAU-only group received pharmacotherapy and psychoeducation.⁴ 
• Blinded clinicians used the Connors’ Adult ADHD Rating Scale to assess ADHD symptoms.⁴
• Secondary outcomes were determined by self-reported questionnaires that patients completed online.⁴
• All statistical analyses were performed on an intention-to-treat sample as well as the per protocol sample.⁴

Outcomes

• The primary outcome was ADHD symptoms rated by clinicians. Secondary outcomes included self-reported ADHD symptoms, executive functioning, mindfulness skills, positive mental health, and general functioning. Outcomes were examined at baseline and then at post treatment and 3- and 6-month follow-up.⁴
• Patients in the MBCT plus TAU group had a significant decrease in clinician-rated ADHD symptoms that was maintained at 6-month follow-up. More patients in the MBCT plus TAU group (27%) vs patients in the TAU group (4%) showed a ≥30% reduction in ADHD symptoms. Compared with patients in the TAU group, patients in the MBCT plus TAU group had significant improvements in ADHD symptoms, mindfulness skills, and positive mental health at post treatment and at 6-month follow-up. Compared with those receiving TAU only, patients treated with MBCT plus TAU reported no improvement in executive functioning at post treatment, but did improve at 6-month follow-up.⁴

Continue to: Conclusion

Conclusion

• Compared with TAU only, MBCT plus TAU is more effective in reducing ADHD symptoms, with a lasting effect at 6-month follow-up. In terms of secondary outcomes, MBCT plus TAU proved to be effective in improving mindfulness, self-compassion, positive mental health, and executive functioning. The results of this trial demonstrate that psychosocial treatments can be effective in addition to TAU in patients with ADHD, and MBCT holds promise for adult ADHD.⁴

Delirium is defined as a disturbance in attention, awareness, and cognition that develops over hours to days as a direct physiological consequence of an underlying medical condition and is not better explained by another neurocognitive disorder.¹ This condition is found in up to 31% of general medical patients and up to 87% of critically ill medical patients. Delirium is commonly seen in patients who have undergone surgery, those who are in palliative care, and patients with cancer.² It is associated with increased morbidity and mortality. Compared with those who do not develop delirium, patients who are hospitalized who develop delirium have a higher risk of longer hospital stays, post-hospitalization nursing facility placement, persistent cognitive dysfunction, and death.³

Thus far, the management and treatment of delirium have been complicated by an incomplete understanding of the pathophysiology of this condition. However, prevailing theories suggest a dysregulation of neurotransmitter synthesis, function, or availability.² Recent literature reflects this theory; researchers have investigated agents that target dopamine or acetylcholine. Below we review some of this recent literature on treating delirium; these studies are summarized in the Table.^4-6

1. Burry L, Mehta S, Perreault MM, et al. Antipsychotics for treatment of delirium in hospitalized non-ICU patients. Cochrane Database Syst Rev. 2018;6:CD005594.

An extensive literature review identified randomized or quasi-randomized trials on the treatment of delirium among non-critically ill hospitalized patients in which antipsychotics were compared with nonantipsychotic medications or placebo, or in which a first-generation antipsychotic (FGA) was compared with a second-generation antipsychotic (SGA).⁴

Study design

• Researchers conducted a literature review of 9 trials that included 727 hospitalized but not critically ill patients (ie, they were not in an ICU) who developed delirium.
• Four trials compared an antipsychotic with a medication from another drug class or with placebo.
• Seven trials compared a FGA with an SGA.

Outcomes

• Although the intended primary outcome was the duration of delirium, none of the included studies reported on duration of delirium. Secondary outcomes were delirium severity and resolution, mortality, hospital length of stay, discharge disposition, health-related quality of life, and adverse effects.
• Among the secondary outcomes, no statistical difference was observed between delirium severity, delirium resolution, or mortality.
• None of the included studies reported on hospital length of stay, discharge disposition, or health-related quality of life.
• Evidence related to adverse effects was determined to be very low quality due to potential bias, inconsistency, and imprecision.

Conclusion

• A review of 9 randomized trials did not find any evidence supporting the use of antipsychotics for treating delirium. However, most of the studies included were of lower quality because they were single-center trials with insufficient sample sizes, heterogeneous study populations, and risk of bias.

Continue to: 2...

Study design

• Researchers used the Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) to assess 1,183 patients with acute respiratory failure or shock in 16 medical centers in the United States.⁵
• Overall, 566 patients developed delirium and were randomized in a double-blind fashion to receive IV haloperidol, ziprasidone, or placebo.
• Haloperidol was started at 2.5 mg (age <70) or 1.25 mg (age ≥70) every 12 hours and titrated to a maximum dose of 20 mg/d as tolerated.
• Ziprasidone was started at 5 mg (age <70) or 2.5 mg (age ≥70) every 12 hours and titrated to a maximum dose of 40 mg/d as tolerated.

Outcomes

• The primary endpoint was days alive without delirium or coma. Secondary endpoints included duration of delirium, time to freedom from mechanical ventilation, time to final successful ICU discharge, time to ICU readmission, time to successful hospital discharge, 30-day survival, and 90-day survival.
• Neither ziprasidone nor haloperidol had an impact on number of days alive without delirium or coma.
• There was also no statistically significant difference in 30-day survival, 90-day survival, time to freedom from mechanical ventilation, ICU discharge, ICU readmission, or hospital discharge.

Conclusion

• This study found no evidence supporting haloperidol or ziprasidone for the treatment of delirium. Because all patients in this study were critically ill, it is unclear if these results would be generalizable to other hospitalized patient populations.

3. Yu A, Wu S, Zhang Z, et al. Cholinesterase inhibitors for the treatment of delirium in non-ICU settings. Cochrane Database Syst Rev. 2018;6:CD012494.

Continue to: Study design

• A literature review identified published and unpublished randomized controlled trials in English and Chinese in which cholinesterase inhibitors were compared with placebo or another drug for treating delirium in non-critically ill patients.⁶
• Only one study met the criteria to be included in the review. It included 15 participants treated with rivastigmine or placebo.

Outcomes

• The intended primary outcomes were severity of delirium and duration of delirium. However, the included study did not report on the severity of delirium. It also lacked statistical power to determine a difference in duration of delirium between the rivastigmine and placebo groups.
• Secondary outcomes included use of a rescue medication, persistent cognitive impairment, length of hospitalization, institutionalization, mortality, cost of intervention, early departure from the study, and quality of life.
• There was no clear difference between the rivastigmine group and the placebo group in terms of the use of rescue medications, mortality, or early departure from the study. The included study did not report on persistent cognitive impairment, length of hospitalization, institutionalization, cost of intervention, or quality of life.

Conclusion

• This literature review did not find any evidence to support the use of cholinesterase inhibitors for treating delirium. However, because this review included only a single small study, limited conclusions can be drawn from this research.

In summary, delirium is common, especially among patients who are acutely medically ill, and it is associated with poor physical and cognitive clinical outcomes. Because of these poor outcomes, it is important to identify delirium early and intervene aggressively. Clearly, there is a need for further research into short- and long-term treatments for delirium.

Delirium is defined as a disturbance in attention, awareness, and cognition that develops over hours to days as a direct physiological consequence of an underlying medical condition and is not better explained by another neurocognitive disorder.¹ This condition is found in up to 31% of general medical patients and up to 87% of critically ill medical patients. Delirium is commonly seen in patients who have undergone surgery, those who are in palliative care, and patients with cancer.² It is associated with increased morbidity and mortality. Compared with those who do not develop delirium, patients who are hospitalized who develop delirium have a higher risk of longer hospital stays, post-hospitalization nursing facility placement, persistent cognitive dysfunction, and death.³

Thus far, the management and treatment of delirium have been complicated by an incomplete understanding of the pathophysiology of this condition. However, prevailing theories suggest a dysregulation of neurotransmitter synthesis, function, or availability.² Recent literature reflects this theory; researchers have investigated agents that target dopamine or acetylcholine. Below we review some of this recent literature on treating delirium; these studies are summarized in the Table.^4-6

1. Burry L, Mehta S, Perreault MM, et al. Antipsychotics for treatment of delirium in hospitalized non-ICU patients. Cochrane Database Syst Rev. 2018;6:CD005594.

An extensive literature review identified randomized or quasi-randomized trials on the treatment of delirium among non-critically ill hospitalized patients in which antipsychotics were compared with nonantipsychotic medications or placebo, or in which a first-generation antipsychotic (FGA) was compared with a second-generation antipsychotic (SGA).⁴

Study design

• Researchers conducted a literature review of 9 trials that included 727 hospitalized but not critically ill patients (ie, they were not in an ICU) who developed delirium.
• Four trials compared an antipsychotic with a medication from another drug class or with placebo.
• Seven trials compared a FGA with an SGA.

Outcomes

• Although the intended primary outcome was the duration of delirium, none of the included studies reported on duration of delirium. Secondary outcomes were delirium severity and resolution, mortality, hospital length of stay, discharge disposition, health-related quality of life, and adverse effects.
• Among the secondary outcomes, no statistical difference was observed between delirium severity, delirium resolution, or mortality.
• None of the included studies reported on hospital length of stay, discharge disposition, or health-related quality of life.
• Evidence related to adverse effects was determined to be very low quality due to potential bias, inconsistency, and imprecision.

Conclusion

• A review of 9 randomized trials did not find any evidence supporting the use of antipsychotics for treating delirium. However, most of the studies included were of lower quality because they were single-center trials with insufficient sample sizes, heterogeneous study populations, and risk of bias.

Continue to: 2...

Study design

• Researchers used the Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) to assess 1,183 patients with acute respiratory failure or shock in 16 medical centers in the United States.⁵
• Overall, 566 patients developed delirium and were randomized in a double-blind fashion to receive IV haloperidol, ziprasidone, or placebo.
• Haloperidol was started at 2.5 mg (age <70) or 1.25 mg (age ≥70) every 12 hours and titrated to a maximum dose of 20 mg/d as tolerated.
• Ziprasidone was started at 5 mg (age <70) or 2.5 mg (age ≥70) every 12 hours and titrated to a maximum dose of 40 mg/d as tolerated.

Outcomes

• The primary endpoint was days alive without delirium or coma. Secondary endpoints included duration of delirium, time to freedom from mechanical ventilation, time to final successful ICU discharge, time to ICU readmission, time to successful hospital discharge, 30-day survival, and 90-day survival.
• Neither ziprasidone nor haloperidol had an impact on number of days alive without delirium or coma.
• There was also no statistically significant difference in 30-day survival, 90-day survival, time to freedom from mechanical ventilation, ICU discharge, ICU readmission, or hospital discharge.

Conclusion

• This study found no evidence supporting haloperidol or ziprasidone for the treatment of delirium. Because all patients in this study were critically ill, it is unclear if these results would be generalizable to other hospitalized patient populations.

3. Yu A, Wu S, Zhang Z, et al. Cholinesterase inhibitors for the treatment of delirium in non-ICU settings. Cochrane Database Syst Rev. 2018;6:CD012494.

Continue to: Study design

• A literature review identified published and unpublished randomized controlled trials in English and Chinese in which cholinesterase inhibitors were compared with placebo or another drug for treating delirium in non-critically ill patients.⁶
• Only one study met the criteria to be included in the review. It included 15 participants treated with rivastigmine or placebo.

Outcomes

• The intended primary outcomes were severity of delirium and duration of delirium. However, the included study did not report on the severity of delirium. It also lacked statistical power to determine a difference in duration of delirium between the rivastigmine and placebo groups.
• Secondary outcomes included use of a rescue medication, persistent cognitive impairment, length of hospitalization, institutionalization, mortality, cost of intervention, early departure from the study, and quality of life.
• There was no clear difference between the rivastigmine group and the placebo group in terms of the use of rescue medications, mortality, or early departure from the study. The included study did not report on persistent cognitive impairment, length of hospitalization, institutionalization, cost of intervention, or quality of life.

Conclusion

• This literature review did not find any evidence to support the use of cholinesterase inhibitors for treating delirium. However, because this review included only a single small study, limited conclusions can be drawn from this research.

In summary, delirium is common, especially among patients who are acutely medically ill, and it is associated with poor physical and cognitive clinical outcomes. Because of these poor outcomes, it is important to identify delirium early and intervene aggressively. Clearly, there is a need for further research into short- and long-term treatments for delirium.

Delirium is defined as a disturbance in attention, awareness, and cognition that develops over hours to days as a direct physiological consequence of an underlying medical condition and is not better explained by another neurocognitive disorder.¹ This condition is found in up to 31% of general medical patients and up to 87% of critically ill medical patients. Delirium is commonly seen in patients who have undergone surgery, those who are in palliative care, and patients with cancer.² It is associated with increased morbidity and mortality. Compared with those who do not develop delirium, patients who are hospitalized who develop delirium have a higher risk of longer hospital stays, post-hospitalization nursing facility placement, persistent cognitive dysfunction, and death.³

Thus far, the management and treatment of delirium have been complicated by an incomplete understanding of the pathophysiology of this condition. However, prevailing theories suggest a dysregulation of neurotransmitter synthesis, function, or availability.² Recent literature reflects this theory; researchers have investigated agents that target dopamine or acetylcholine. Below we review some of this recent literature on treating delirium; these studies are summarized in the Table.^4-6

1. Burry L, Mehta S, Perreault MM, et al. Antipsychotics for treatment of delirium in hospitalized non-ICU patients. Cochrane Database Syst Rev. 2018;6:CD005594.

An extensive literature review identified randomized or quasi-randomized trials on the treatment of delirium among non-critically ill hospitalized patients in which antipsychotics were compared with nonantipsychotic medications or placebo, or in which a first-generation antipsychotic (FGA) was compared with a second-generation antipsychotic (SGA).⁴

Study design

• Researchers conducted a literature review of 9 trials that included 727 hospitalized but not critically ill patients (ie, they were not in an ICU) who developed delirium.
• Four trials compared an antipsychotic with a medication from another drug class or with placebo.
• Seven trials compared a FGA with an SGA.

Outcomes

• Although the intended primary outcome was the duration of delirium, none of the included studies reported on duration of delirium. Secondary outcomes were delirium severity and resolution, mortality, hospital length of stay, discharge disposition, health-related quality of life, and adverse effects.
• Among the secondary outcomes, no statistical difference was observed between delirium severity, delirium resolution, or mortality.
• None of the included studies reported on hospital length of stay, discharge disposition, or health-related quality of life.
• Evidence related to adverse effects was determined to be very low quality due to potential bias, inconsistency, and imprecision.

Conclusion

• A review of 9 randomized trials did not find any evidence supporting the use of antipsychotics for treating delirium. However, most of the studies included were of lower quality because they were single-center trials with insufficient sample sizes, heterogeneous study populations, and risk of bias.

Continue to: 2...

Study design

• Researchers used the Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) to assess 1,183 patients with acute respiratory failure or shock in 16 medical centers in the United States.⁵
• Overall, 566 patients developed delirium and were randomized in a double-blind fashion to receive IV haloperidol, ziprasidone, or placebo.
• Haloperidol was started at 2.5 mg (age <70) or 1.25 mg (age ≥70) every 12 hours and titrated to a maximum dose of 20 mg/d as tolerated.
• Ziprasidone was started at 5 mg (age <70) or 2.5 mg (age ≥70) every 12 hours and titrated to a maximum dose of 40 mg/d as tolerated.

Outcomes

• The primary endpoint was days alive without delirium or coma. Secondary endpoints included duration of delirium, time to freedom from mechanical ventilation, time to final successful ICU discharge, time to ICU readmission, time to successful hospital discharge, 30-day survival, and 90-day survival.
• Neither ziprasidone nor haloperidol had an impact on number of days alive without delirium or coma.
• There was also no statistically significant difference in 30-day survival, 90-day survival, time to freedom from mechanical ventilation, ICU discharge, ICU readmission, or hospital discharge.

Conclusion

• This study found no evidence supporting haloperidol or ziprasidone for the treatment of delirium. Because all patients in this study were critically ill, it is unclear if these results would be generalizable to other hospitalized patient populations.

3. Yu A, Wu S, Zhang Z, et al. Cholinesterase inhibitors for the treatment of delirium in non-ICU settings. Cochrane Database Syst Rev. 2018;6:CD012494.

Continue to: Study design

• A literature review identified published and unpublished randomized controlled trials in English and Chinese in which cholinesterase inhibitors were compared with placebo or another drug for treating delirium in non-critically ill patients.⁶
• Only one study met the criteria to be included in the review. It included 15 participants treated with rivastigmine or placebo.

Outcomes

• The intended primary outcomes were severity of delirium and duration of delirium. However, the included study did not report on the severity of delirium. It also lacked statistical power to determine a difference in duration of delirium between the rivastigmine and placebo groups.
• Secondary outcomes included use of a rescue medication, persistent cognitive impairment, length of hospitalization, institutionalization, mortality, cost of intervention, early departure from the study, and quality of life.
• There was no clear difference between the rivastigmine group and the placebo group in terms of the use of rescue medications, mortality, or early departure from the study. The included study did not report on persistent cognitive impairment, length of hospitalization, institutionalization, cost of intervention, or quality of life.

Conclusion

• This literature review did not find any evidence to support the use of cholinesterase inhibitors for treating delirium. However, because this review included only a single small study, limited conclusions can be drawn from this research.

In summary, delirium is common, especially among patients who are acutely medically ill, and it is associated with poor physical and cognitive clinical outcomes. Because of these poor outcomes, it is important to identify delirium early and intervene aggressively. Clearly, there is a need for further research into short- and long-term treatments for delirium.

The “human microbiota” describes all microorganisms within the human body, including bacteria, viruses, and eukaryotes. The related term “microbiome” refers to the complete catalog of these microbes and their genes.¹ There is a growing awareness that the human microbiota plays an important role in maintaining mental health, and that a disruption in its composition can contribute to manifestations of psychiatric disorders. A growing body of evidence has also linked mental health outcomes to the gut microbiome, suggesting that the gut microbiota can modulate the gut-brain axis.²

Numerous neurotransmitters, including dopamine, serotonin, gamma-aminobutyric acid, and acetylcholine, are produced in the gastrointestinal (GI) tract, and our diet is vital in sustaining and replenishing them. At the same time, our brain regulates our GI tract by secretion of hormones such as oxytocin, leptin, ghrelin, neuropeptide Y, corticotrophin-releasing factor, and a plethora of others. Dysregulation of this microbiome can lead to both physical and mental illnesses. Symptoms of psychiatric disorders, such as depression, psychosis, anxiety, and autism, can be a consequence of this dysregulation.²

Our diet can also modify the gut micro­organisms and therefore many of its metabolic pathways. More attention has been given to pre- and probiotics and their effects on DNA by epigenetic changes. One can quickly start to appreciate how this intricate crosstalk can lead to a variety of pathologic and psychiatric problems that have an adverse effect on autoimmune, inflammatory, metabolic, cognitive, and behavioral processes.^2,3

Thus far, links have mostly been reported in animal models, and human studies are limited.⁴ Researchers are just beginning to elucidate how the microbiota affect gut-brain signaling in humans. Such mechanisms may include alterations in microbial composition, immune activation, vagus nerve signaling, alterations in tryptophan metabolism, production of specific microbial neuroactive metabolites, and bacterial cell wall sugars.⁵ The microbiota-gut-brain axis plays a part in regulating/programming the hypothalamic-pituitary-adrenal (HPA) axis throughout the life span.³ The interactions between the gut microbiome, the immune system, and the CNS are regulated through pathways that involve endocrine functions (HPA axis), the immune system, and metabolic factors.^3,4 Recent research focusing on the gut microbiome has also given rise to international projects such as the Human Microbiome Project (Human Microbiome Project Consortium, 2012).³

Several studies have looked into psychiatry and inflammatory/immune pathways. Here we review 3 recent studies that have focused on the gut-brain axis (Table^6-8).

1. Rudzki L, Pawlak D, Pawlak K, et al. Immune suppression of IgG response against dairy proteins in major depression. BMC Psychiatry. 2017;17(1):268.

The aim of this study was to evaluate immunoglobulin G (IgG) response against 40 food products in patients with depression vs those in a control group, along with changes in inflammatory markers, psychological stress, and dietary variables.⁶

Study design

• N = 63, IgG levels against 44 food products, cortisol levels, tumor necrosis factor (TNF)-alpha, interleukin 6 (IL-6), and IL-1 beta levels were recorded. The psychological parameters of 34 participants with depression and 29 controls were compared using the Hamilton Depression Rating scale, (HAM-D-17), Perceived Stress scale, and Symptom Checklist scale. The study was conducted in Poland.

Continue to: Outcomes

Outcomes

• Patients who were depressed had lower IgG levels against dairy products compared to controls when there was high dairy consumption. However, there was no overall difference between patients and controls in mean IgG concentration against food products. 
• Patients who were depressed had higher levels of cortisol. Levels of cortisol had a positive correlation with HAM-D-17 score. Patients with depression had lower levels of TNF-alpha.

Conclusion

• Patients with depression had lower levels of IgG against dairy protein. Patients with depression had high cortisol levels but decreased levels of TNF-alpha, which could explain an immune suppression of IgG in these patients. There were no differences in IL-6 or IL-1beta levels.

Hypercortisolemia is present in approximately 60% of patients with depression. Elevated cortisol levels have a negative effect on lymphocyte function. B-lymphocytes (CD 10+ and CD 19+) are sensitive to glucocorticoids. Studies in mice have demonstrated that elevated glucocorticoid levels are associated with a 50% decrease in serum B-lymphocytes, and this can be explained by downregulation of c-myc protein, which plays a role in cell proliferation and cell survival. Glucocorticoids also decrease levels of protein kinases that are vital for the cell cycle to continue, and they upregulate p27 and p21, which are cell cycle inhibitors. Therefore, if high cortisol suppresses B-lymphocyte production, this can explain how patients with depression have low IgG levels, since B-lymphocytes differentiate into plasma cells that will produce antibodies.⁶

Depression can trigger an inflammatory response by increasing levels of inflammatory cytokines, acute phase reactants, and oxidative molecules. The inflammatory response can lead to intestinal wall disruption, and therefore bacteria can migrate across the GI barrier, along with food antigens, which could then lead to food antigen hypersensitivity.⁶

The significance of diet

Many studies have looked into specific types of diets, such as the Mediterranean diet, the ketogenic diet, and the addition of supplements such as probiotics, omega-3 fatty acids, zinc, and multivitamins.⁷ The Mediterranean diet is high in fiber, nuts, legumes, and fish.⁷ The ketogenic diet includes a controlled amount of fat, but is low in protein and carbohydrates.⁷ The main point is that a balanced diet can have a positive effect on mental health.⁷ The Mediterranean diet has shown to decrease the incidence of cardiovascular disease and lower the risk of depression.⁷ In animal studies, the ketogenic diet has improved anxiety, depression, and autism.⁷ Diet clearly affects gut microbiota and, as a consequence, the body’s level of inflammation.⁷ 

Continue to: The following review...

The following review highlighted the significance of diet on gut microbiome and mental health.⁷

2. Mörkl S, Wagner-Skacel J, Lahousen T, et al. The role of nutrition and the gut- brain axis in psychiatry: a review of the literature. Neuropsychobiology. 2018;17: 1-9.

Study design

• These researchers provided a narrative review of the significance of a healthy diet and nutritional supplements on the gut microbiome and the treatment of patients with psychiatric illness. 

Outcomes

• This review suggested dietary coaching as a nonpharmacologic treatment for patients with psychiatric illness. 

Conclusion

• The utilization of nutritional advice, along with medication management, therapy, and physical activity, can provide a holistic approach to the biopsychosocial treatment of patients with psychiatric illness.

This review also emphasized the poor dietary trends of Westernized countries, which include calorie-dense, genetically altered, processed meals. As Mörkl et al⁷ noted, we are overfed but undernourished. Mörkl et al⁷ reviewed studies that involve dietary coaching as part of the treatment plan of patients with mental illness. In one of these studies, patients who received nutritional advice and coaching over 6 weeks had a 40% to 50% decrease in depressive symptoms. These effects persisted for 2 more years. Mörkl et al⁷ also reviewed an Italian study that found that providing nutritional advice in patients with affective disorders and psychosis helped improve symptom severity and sleep.⁷

Continue to: Mörkl et al...

Mörkl et al⁷ also reviewed dietary supplements. Some studies have linked use of omega-3 fatty acids with improvement in affective disorders, Alzheimer’s disease, and posttraumatic stress disorder, as well as cardiovascular conditions. Omega-3 fatty acids may exert beneficial effects by enhancing brain-derived neurotrophic factor and neurogenesis as well as by decreasing inflammation.⁷

Zinc supplementation can also improve depression, as it has been linked to cytokine variation and hippocampal neuronal growth. Vitamin B₉ deficiency and vitamin D deficiency also have been associated with depression. Mörkl et al⁷ emphasized that a balanced diet that incorporates a variety of nutrients is more beneficial than supplementation of any individual vitamin alone.

Researchers have long emphasized the importance of a healthy balanced diet when treating patients with medical conditions such as cardiovascular or cerebrovascular diseases. Based on the studies Mörkl et al⁷ reviewed, the same emphasis should be communicated to our patients who suffer from psychiatric conditions.

The gut and anxiety

The gut microbiome has also been an area of research when studying generalized anxiety disorder (GAD).⁸

3. Jiang HY, Zhang X, Yu ZH, et al. Altered gut microbiota profile in patients with generalized anxiety disorder. J Psychiatr Res. 2018;104:130-136.

The aim of the study was to determine if there were changes in the composition of the gut microbiome in patients with GAD compared with healthy controls.⁸

Continue to: Study design

Study design

• A cross-sectional study of 76 patients in Zhejiang, China. Forty patients with GAD in the active state and 36 healthy controls were compared in terms of composition of GI microbacterial flora.
• Researchers also examined a subgroup of 12 patients who were treatment-naïve and 17 controls. Stool samples were collected from the 12 patients who were treatment-naïve before initiating medication.
• Researchers also conducted a prospective study in a subgroup of 9 patients with GAD in both the active state and remissive state. Two stool samples were collected from each patient—one during the active state of GAD and one during the remissive state—for a total of 18 samples. Stool samples analyzed with the use of polymerase chain reaction and microbial analysis.
• Patients completed the Hamilton Anxiety Rating (HAM-A) scale and were classified into groups. Those with HAM-A scores >14 were classified as being in the active state of GAD, and those with scores <7 were classified as being in the remissive state. 

Outcomes

• Among the samples collected, 8 bacterial taxa were found in different amounts in patients with GAD and healthy controls. Bacteroidetes, Ruminococcus gnavus, and Fusobacterium were increased in patients with GAD compared with controls, while Faecalibacterium, Eubacterium rectale, Sutterella, Lachnospira, and Butyricicoccus were increased in healthy controls.
• Bacterial variety was notably lower in the 12 patients who were treatment-naïve compared with the control group.
• There was no notable difference in microbial composition between patients in the active vs remissive state.

Conclusion

• Patients with GAD had less short chain fatty acid–producing bacteria (Faecalibacterium, Eubacterium rectale, Sutterella, Lachnospira, and Butyricicoccus) compared with controls. Decreased formation of short chain fatty acids could lead to GI barrier disruption. Fusobacterium and Ruminococcus were increased in patients with GAD. Fusobacterium can cause disease and be invasive when it disseminates within the body. The inflammatory characteristics of Fusobacterium contribute to the immunologic activation in GAD. Ruminococcus breaks down mucin, which could then increase GI permeability by mucous degradation of the GI lumen.

Changes in food processing and manufacturing have led to changes in our diets. Changes in our normal GI microbacterial flora could lead to increased gut permeability, bacterial dissemination, and subsequent systemic inflammation. Research has shown that the composition of the microbiota changes across the life span.⁹ A balanced intake of nutrients is important for both our physical and mental health and safeguards the basis of gut microbiome regulation. A well-regulated gut microbiome ensures low levels of inflammation in the brain and body. Lifestyle modifications and dietary coaching could be practical interventions for patients with psychiatric conditions.⁵ Current advances in technology now offer precise analyses of thousands of metabolites, enabling metabolomics to offer the promise of discovering new drug targets and biomarkers that may help pave a way to precision medicine.

The “human microbiota” describes all microorganisms within the human body, including bacteria, viruses, and eukaryotes. The related term “microbiome” refers to the complete catalog of these microbes and their genes.¹ There is a growing awareness that the human microbiota plays an important role in maintaining mental health, and that a disruption in its composition can contribute to manifestations of psychiatric disorders. A growing body of evidence has also linked mental health outcomes to the gut microbiome, suggesting that the gut microbiota can modulate the gut-brain axis.²

Numerous neurotransmitters, including dopamine, serotonin, gamma-aminobutyric acid, and acetylcholine, are produced in the gastrointestinal (GI) tract, and our diet is vital in sustaining and replenishing them. At the same time, our brain regulates our GI tract by secretion of hormones such as oxytocin, leptin, ghrelin, neuropeptide Y, corticotrophin-releasing factor, and a plethora of others. Dysregulation of this microbiome can lead to both physical and mental illnesses. Symptoms of psychiatric disorders, such as depression, psychosis, anxiety, and autism, can be a consequence of this dysregulation.²

Our diet can also modify the gut micro­organisms and therefore many of its metabolic pathways. More attention has been given to pre- and probiotics and their effects on DNA by epigenetic changes. One can quickly start to appreciate how this intricate crosstalk can lead to a variety of pathologic and psychiatric problems that have an adverse effect on autoimmune, inflammatory, metabolic, cognitive, and behavioral processes.^2,3

Thus far, links have mostly been reported in animal models, and human studies are limited.⁴ Researchers are just beginning to elucidate how the microbiota affect gut-brain signaling in humans. Such mechanisms may include alterations in microbial composition, immune activation, vagus nerve signaling, alterations in tryptophan metabolism, production of specific microbial neuroactive metabolites, and bacterial cell wall sugars.⁵ The microbiota-gut-brain axis plays a part in regulating/programming the hypothalamic-pituitary-adrenal (HPA) axis throughout the life span.³ The interactions between the gut microbiome, the immune system, and the CNS are regulated through pathways that involve endocrine functions (HPA axis), the immune system, and metabolic factors.^3,4 Recent research focusing on the gut microbiome has also given rise to international projects such as the Human Microbiome Project (Human Microbiome Project Consortium, 2012).³

Several studies have looked into psychiatry and inflammatory/immune pathways. Here we review 3 recent studies that have focused on the gut-brain axis (Table^6-8).

1. Rudzki L, Pawlak D, Pawlak K, et al. Immune suppression of IgG response against dairy proteins in major depression. BMC Psychiatry. 2017;17(1):268.

The aim of this study was to evaluate immunoglobulin G (IgG) response against 40 food products in patients with depression vs those in a control group, along with changes in inflammatory markers, psychological stress, and dietary variables.⁶

Study design

• N = 63, IgG levels against 44 food products, cortisol levels, tumor necrosis factor (TNF)-alpha, interleukin 6 (IL-6), and IL-1 beta levels were recorded. The psychological parameters of 34 participants with depression and 29 controls were compared using the Hamilton Depression Rating scale, (HAM-D-17), Perceived Stress scale, and Symptom Checklist scale. The study was conducted in Poland.

Continue to: Outcomes

Outcomes

• Patients who were depressed had lower IgG levels against dairy products compared to controls when there was high dairy consumption. However, there was no overall difference between patients and controls in mean IgG concentration against food products. 
• Patients who were depressed had higher levels of cortisol. Levels of cortisol had a positive correlation with HAM-D-17 score. Patients with depression had lower levels of TNF-alpha.

Conclusion

• Patients with depression had lower levels of IgG against dairy protein. Patients with depression had high cortisol levels but decreased levels of TNF-alpha, which could explain an immune suppression of IgG in these patients. There were no differences in IL-6 or IL-1beta levels.

Hypercortisolemia is present in approximately 60% of patients with depression. Elevated cortisol levels have a negative effect on lymphocyte function. B-lymphocytes (CD 10+ and CD 19+) are sensitive to glucocorticoids. Studies in mice have demonstrated that elevated glucocorticoid levels are associated with a 50% decrease in serum B-lymphocytes, and this can be explained by downregulation of c-myc protein, which plays a role in cell proliferation and cell survival. Glucocorticoids also decrease levels of protein kinases that are vital for the cell cycle to continue, and they upregulate p27 and p21, which are cell cycle inhibitors. Therefore, if high cortisol suppresses B-lymphocyte production, this can explain how patients with depression have low IgG levels, since B-lymphocytes differentiate into plasma cells that will produce antibodies.⁶

Depression can trigger an inflammatory response by increasing levels of inflammatory cytokines, acute phase reactants, and oxidative molecules. The inflammatory response can lead to intestinal wall disruption, and therefore bacteria can migrate across the GI barrier, along with food antigens, which could then lead to food antigen hypersensitivity.⁶

The significance of diet

Many studies have looked into specific types of diets, such as the Mediterranean diet, the ketogenic diet, and the addition of supplements such as probiotics, omega-3 fatty acids, zinc, and multivitamins.⁷ The Mediterranean diet is high in fiber, nuts, legumes, and fish.⁷ The ketogenic diet includes a controlled amount of fat, but is low in protein and carbohydrates.⁷ The main point is that a balanced diet can have a positive effect on mental health.⁷ The Mediterranean diet has shown to decrease the incidence of cardiovascular disease and lower the risk of depression.⁷ In animal studies, the ketogenic diet has improved anxiety, depression, and autism.⁷ Diet clearly affects gut microbiota and, as a consequence, the body’s level of inflammation.⁷ 

Continue to: The following review...

The following review highlighted the significance of diet on gut microbiome and mental health.⁷

2. Mörkl S, Wagner-Skacel J, Lahousen T, et al. The role of nutrition and the gut- brain axis in psychiatry: a review of the literature. Neuropsychobiology. 2018;17: 1-9.

Study design

• These researchers provided a narrative review of the significance of a healthy diet and nutritional supplements on the gut microbiome and the treatment of patients with psychiatric illness. 

Outcomes

• This review suggested dietary coaching as a nonpharmacologic treatment for patients with psychiatric illness. 

Conclusion

• The utilization of nutritional advice, along with medication management, therapy, and physical activity, can provide a holistic approach to the biopsychosocial treatment of patients with psychiatric illness.

This review also emphasized the poor dietary trends of Westernized countries, which include calorie-dense, genetically altered, processed meals. As Mörkl et al⁷ noted, we are overfed but undernourished. Mörkl et al⁷ reviewed studies that involve dietary coaching as part of the treatment plan of patients with mental illness. In one of these studies, patients who received nutritional advice and coaching over 6 weeks had a 40% to 50% decrease in depressive symptoms. These effects persisted for 2 more years. Mörkl et al⁷ also reviewed an Italian study that found that providing nutritional advice in patients with affective disorders and psychosis helped improve symptom severity and sleep.⁷

Continue to: Mörkl et al...

Mörkl et al⁷ also reviewed dietary supplements. Some studies have linked use of omega-3 fatty acids with improvement in affective disorders, Alzheimer’s disease, and posttraumatic stress disorder, as well as cardiovascular conditions. Omega-3 fatty acids may exert beneficial effects by enhancing brain-derived neurotrophic factor and neurogenesis as well as by decreasing inflammation.⁷

Zinc supplementation can also improve depression, as it has been linked to cytokine variation and hippocampal neuronal growth. Vitamin B₉ deficiency and vitamin D deficiency also have been associated with depression. Mörkl et al⁷ emphasized that a balanced diet that incorporates a variety of nutrients is more beneficial than supplementation of any individual vitamin alone.

Researchers have long emphasized the importance of a healthy balanced diet when treating patients with medical conditions such as cardiovascular or cerebrovascular diseases. Based on the studies Mörkl et al⁷ reviewed, the same emphasis should be communicated to our patients who suffer from psychiatric conditions.

The gut and anxiety

The gut microbiome has also been an area of research when studying generalized anxiety disorder (GAD).⁸

3. Jiang HY, Zhang X, Yu ZH, et al. Altered gut microbiota profile in patients with generalized anxiety disorder. J Psychiatr Res. 2018;104:130-136.

The aim of the study was to determine if there were changes in the composition of the gut microbiome in patients with GAD compared with healthy controls.⁸

Continue to: Study design

Study design

• A cross-sectional study of 76 patients in Zhejiang, China. Forty patients with GAD in the active state and 36 healthy controls were compared in terms of composition of GI microbacterial flora.
• Researchers also examined a subgroup of 12 patients who were treatment-naïve and 17 controls. Stool samples were collected from the 12 patients who were treatment-naïve before initiating medication.
• Researchers also conducted a prospective study in a subgroup of 9 patients with GAD in both the active state and remissive state. Two stool samples were collected from each patient—one during the active state of GAD and one during the remissive state—for a total of 18 samples. Stool samples analyzed with the use of polymerase chain reaction and microbial analysis.
• Patients completed the Hamilton Anxiety Rating (HAM-A) scale and were classified into groups. Those with HAM-A scores >14 were classified as being in the active state of GAD, and those with scores <7 were classified as being in the remissive state. 

Outcomes

• Among the samples collected, 8 bacterial taxa were found in different amounts in patients with GAD and healthy controls. Bacteroidetes, Ruminococcus gnavus, and Fusobacterium were increased in patients with GAD compared with controls, while Faecalibacterium, Eubacterium rectale, Sutterella, Lachnospira, and Butyricicoccus were increased in healthy controls.
• Bacterial variety was notably lower in the 12 patients who were treatment-naïve compared with the control group.
• There was no notable difference in microbial composition between patients in the active vs remissive state.

Conclusion

• Patients with GAD had less short chain fatty acid–producing bacteria (Faecalibacterium, Eubacterium rectale, Sutterella, Lachnospira, and Butyricicoccus) compared with controls. Decreased formation of short chain fatty acids could lead to GI barrier disruption. Fusobacterium and Ruminococcus were increased in patients with GAD. Fusobacterium can cause disease and be invasive when it disseminates within the body. The inflammatory characteristics of Fusobacterium contribute to the immunologic activation in GAD. Ruminococcus breaks down mucin, which could then increase GI permeability by mucous degradation of the GI lumen.

Changes in food processing and manufacturing have led to changes in our diets. Changes in our normal GI microbacterial flora could lead to increased gut permeability, bacterial dissemination, and subsequent systemic inflammation. Research has shown that the composition of the microbiota changes across the life span.⁹ A balanced intake of nutrients is important for both our physical and mental health and safeguards the basis of gut microbiome regulation. A well-regulated gut microbiome ensures low levels of inflammation in the brain and body. Lifestyle modifications and dietary coaching could be practical interventions for patients with psychiatric conditions.⁵ Current advances in technology now offer precise analyses of thousands of metabolites, enabling metabolomics to offer the promise of discovering new drug targets and biomarkers that may help pave a way to precision medicine.

The “human microbiota” describes all microorganisms within the human body, including bacteria, viruses, and eukaryotes. The related term “microbiome” refers to the complete catalog of these microbes and their genes.¹ There is a growing awareness that the human microbiota plays an important role in maintaining mental health, and that a disruption in its composition can contribute to manifestations of psychiatric disorders. A growing body of evidence has also linked mental health outcomes to the gut microbiome, suggesting that the gut microbiota can modulate the gut-brain axis.²

Numerous neurotransmitters, including dopamine, serotonin, gamma-aminobutyric acid, and acetylcholine, are produced in the gastrointestinal (GI) tract, and our diet is vital in sustaining and replenishing them. At the same time, our brain regulates our GI tract by secretion of hormones such as oxytocin, leptin, ghrelin, neuropeptide Y, corticotrophin-releasing factor, and a plethora of others. Dysregulation of this microbiome can lead to both physical and mental illnesses. Symptoms of psychiatric disorders, such as depression, psychosis, anxiety, and autism, can be a consequence of this dysregulation.²

Our diet can also modify the gut micro­organisms and therefore many of its metabolic pathways. More attention has been given to pre- and probiotics and their effects on DNA by epigenetic changes. One can quickly start to appreciate how this intricate crosstalk can lead to a variety of pathologic and psychiatric problems that have an adverse effect on autoimmune, inflammatory, metabolic, cognitive, and behavioral processes.^2,3

Thus far, links have mostly been reported in animal models, and human studies are limited.⁴ Researchers are just beginning to elucidate how the microbiota affect gut-brain signaling in humans. Such mechanisms may include alterations in microbial composition, immune activation, vagus nerve signaling, alterations in tryptophan metabolism, production of specific microbial neuroactive metabolites, and bacterial cell wall sugars.⁵ The microbiota-gut-brain axis plays a part in regulating/programming the hypothalamic-pituitary-adrenal (HPA) axis throughout the life span.³ The interactions between the gut microbiome, the immune system, and the CNS are regulated through pathways that involve endocrine functions (HPA axis), the immune system, and metabolic factors.^3,4 Recent research focusing on the gut microbiome has also given rise to international projects such as the Human Microbiome Project (Human Microbiome Project Consortium, 2012).³

Several studies have looked into psychiatry and inflammatory/immune pathways. Here we review 3 recent studies that have focused on the gut-brain axis (Table^6-8).

1. Rudzki L, Pawlak D, Pawlak K, et al. Immune suppression of IgG response against dairy proteins in major depression. BMC Psychiatry. 2017;17(1):268.

The aim of this study was to evaluate immunoglobulin G (IgG) response against 40 food products in patients with depression vs those in a control group, along with changes in inflammatory markers, psychological stress, and dietary variables.⁶

Study design

• N = 63, IgG levels against 44 food products, cortisol levels, tumor necrosis factor (TNF)-alpha, interleukin 6 (IL-6), and IL-1 beta levels were recorded. The psychological parameters of 34 participants with depression and 29 controls were compared using the Hamilton Depression Rating scale, (HAM-D-17), Perceived Stress scale, and Symptom Checklist scale. The study was conducted in Poland.

Continue to: Outcomes

Outcomes

• Patients who were depressed had lower IgG levels against dairy products compared to controls when there was high dairy consumption. However, there was no overall difference between patients and controls in mean IgG concentration against food products. 
• Patients who were depressed had higher levels of cortisol. Levels of cortisol had a positive correlation with HAM-D-17 score. Patients with depression had lower levels of TNF-alpha.

Conclusion

• Patients with depression had lower levels of IgG against dairy protein. Patients with depression had high cortisol levels but decreased levels of TNF-alpha, which could explain an immune suppression of IgG in these patients. There were no differences in IL-6 or IL-1beta levels.

Hypercortisolemia is present in approximately 60% of patients with depression. Elevated cortisol levels have a negative effect on lymphocyte function. B-lymphocytes (CD 10+ and CD 19+) are sensitive to glucocorticoids. Studies in mice have demonstrated that elevated glucocorticoid levels are associated with a 50% decrease in serum B-lymphocytes, and this can be explained by downregulation of c-myc protein, which plays a role in cell proliferation and cell survival. Glucocorticoids also decrease levels of protein kinases that are vital for the cell cycle to continue, and they upregulate p27 and p21, which are cell cycle inhibitors. Therefore, if high cortisol suppresses B-lymphocyte production, this can explain how patients with depression have low IgG levels, since B-lymphocytes differentiate into plasma cells that will produce antibodies.⁶

Depression can trigger an inflammatory response by increasing levels of inflammatory cytokines, acute phase reactants, and oxidative molecules. The inflammatory response can lead to intestinal wall disruption, and therefore bacteria can migrate across the GI barrier, along with food antigens, which could then lead to food antigen hypersensitivity.⁶

The significance of diet

Many studies have looked into specific types of diets, such as the Mediterranean diet, the ketogenic diet, and the addition of supplements such as probiotics, omega-3 fatty acids, zinc, and multivitamins.⁷ The Mediterranean diet is high in fiber, nuts, legumes, and fish.⁷ The ketogenic diet includes a controlled amount of fat, but is low in protein and carbohydrates.⁷ The main point is that a balanced diet can have a positive effect on mental health.⁷ The Mediterranean diet has shown to decrease the incidence of cardiovascular disease and lower the risk of depression.⁷ In animal studies, the ketogenic diet has improved anxiety, depression, and autism.⁷ Diet clearly affects gut microbiota and, as a consequence, the body’s level of inflammation.⁷ 

Continue to: The following review...

The following review highlighted the significance of diet on gut microbiome and mental health.⁷

2. Mörkl S, Wagner-Skacel J, Lahousen T, et al. The role of nutrition and the gut- brain axis in psychiatry: a review of the literature. Neuropsychobiology. 2018;17: 1-9.

Study design

• These researchers provided a narrative review of the significance of a healthy diet and nutritional supplements on the gut microbiome and the treatment of patients with psychiatric illness. 

Outcomes

• This review suggested dietary coaching as a nonpharmacologic treatment for patients with psychiatric illness. 

Conclusion

• The utilization of nutritional advice, along with medication management, therapy, and physical activity, can provide a holistic approach to the biopsychosocial treatment of patients with psychiatric illness.

This review also emphasized the poor dietary trends of Westernized countries, which include calorie-dense, genetically altered, processed meals. As Mörkl et al⁷ noted, we are overfed but undernourished. Mörkl et al⁷ reviewed studies that involve dietary coaching as part of the treatment plan of patients with mental illness. In one of these studies, patients who received nutritional advice and coaching over 6 weeks had a 40% to 50% decrease in depressive symptoms. These effects persisted for 2 more years. Mörkl et al⁷ also reviewed an Italian study that found that providing nutritional advice in patients with affective disorders and psychosis helped improve symptom severity and sleep.⁷

Continue to: Mörkl et al...

Mörkl et al⁷ also reviewed dietary supplements. Some studies have linked use of omega-3 fatty acids with improvement in affective disorders, Alzheimer’s disease, and posttraumatic stress disorder, as well as cardiovascular conditions. Omega-3 fatty acids may exert beneficial effects by enhancing brain-derived neurotrophic factor and neurogenesis as well as by decreasing inflammation.⁷

Zinc supplementation can also improve depression, as it has been linked to cytokine variation and hippocampal neuronal growth. Vitamin B₉ deficiency and vitamin D deficiency also have been associated with depression. Mörkl et al⁷ emphasized that a balanced diet that incorporates a variety of nutrients is more beneficial than supplementation of any individual vitamin alone.

Researchers have long emphasized the importance of a healthy balanced diet when treating patients with medical conditions such as cardiovascular or cerebrovascular diseases. Based on the studies Mörkl et al⁷ reviewed, the same emphasis should be communicated to our patients who suffer from psychiatric conditions.

The gut and anxiety

The gut microbiome has also been an area of research when studying generalized anxiety disorder (GAD).⁸

3. Jiang HY, Zhang X, Yu ZH, et al. Altered gut microbiota profile in patients with generalized anxiety disorder. J Psychiatr Res. 2018;104:130-136.

The aim of the study was to determine if there were changes in the composition of the gut microbiome in patients with GAD compared with healthy controls.⁸

Continue to: Study design

Study design

• A cross-sectional study of 76 patients in Zhejiang, China. Forty patients with GAD in the active state and 36 healthy controls were compared in terms of composition of GI microbacterial flora.
• Researchers also examined a subgroup of 12 patients who were treatment-naïve and 17 controls. Stool samples were collected from the 12 patients who were treatment-naïve before initiating medication.
• Researchers also conducted a prospective study in a subgroup of 9 patients with GAD in both the active state and remissive state. Two stool samples were collected from each patient—one during the active state of GAD and one during the remissive state—for a total of 18 samples. Stool samples analyzed with the use of polymerase chain reaction and microbial analysis.
• Patients completed the Hamilton Anxiety Rating (HAM-A) scale and were classified into groups. Those with HAM-A scores >14 were classified as being in the active state of GAD, and those with scores <7 were classified as being in the remissive state. 

Outcomes

• Among the samples collected, 8 bacterial taxa were found in different amounts in patients with GAD and healthy controls. Bacteroidetes, Ruminococcus gnavus, and Fusobacterium were increased in patients with GAD compared with controls, while Faecalibacterium, Eubacterium rectale, Sutterella, Lachnospira, and Butyricicoccus were increased in healthy controls.
• Bacterial variety was notably lower in the 12 patients who were treatment-naïve compared with the control group.
• There was no notable difference in microbial composition between patients in the active vs remissive state.

Conclusion

• Patients with GAD had less short chain fatty acid–producing bacteria (Faecalibacterium, Eubacterium rectale, Sutterella, Lachnospira, and Butyricicoccus) compared with controls. Decreased formation of short chain fatty acids could lead to GI barrier disruption. Fusobacterium and Ruminococcus were increased in patients with GAD. Fusobacterium can cause disease and be invasive when it disseminates within the body. The inflammatory characteristics of Fusobacterium contribute to the immunologic activation in GAD. Ruminococcus breaks down mucin, which could then increase GI permeability by mucous degradation of the GI lumen.

Changes in food processing and manufacturing have led to changes in our diets. Changes in our normal GI microbacterial flora could lead to increased gut permeability, bacterial dissemination, and subsequent systemic inflammation. Research has shown that the composition of the microbiota changes across the life span.⁹ A balanced intake of nutrients is important for both our physical and mental health and safeguards the basis of gut microbiome regulation. A well-regulated gut microbiome ensures low levels of inflammation in the brain and body. Lifestyle modifications and dietary coaching could be practical interventions for patients with psychiatric conditions.⁵ Current advances in technology now offer precise analyses of thousands of metabolites, enabling metabolomics to offer the promise of discovering new drug targets and biomarkers that may help pave a way to precision medicine.

An estimated 7.1% of the adults in United States had a major depressive episode in 2017, and this prevalence has been trending upward over the past few years.¹ The prevalence is even higher in adults between age 18 and 25 (13.1%).¹ Like other psychiatric diagnoses, major depressive disorder (MDD) has a significant impact on productivity as well as daily functioning. Only one-third of patients with MDD achieve remission on the first antidepressant medication.² This leaves an estimated 11.47 million people in the United States in need of an alternate regimen for management of their depressive episode.

The data on evidence-based biologic treatments for treatment-resistant depression are limited (other than for electroconvulsive therapy). Pharmacologic options include switching to a different medication, combining medications, and augmentation strategies or novel approaches such as ketamine and related agents. Here we summarize the findings from 3 recent studies that investigate alternate management options for MDD.

Ketamine: Randomized controlled trial

Traditional antidepressants may reduce suicidal ideation by improving depressive symptoms, but this effect may take weeks. Ketamine, an N-methyl-D-aspartate antagonist, has become a target of research for its antidepressant effects at subanesthetic doses.

_

1. Grunebaum MF, Galfalvy HC, Choo TH, et al. Ketamine for rapid reduction of suicidal thoughts in major depression: a midazolam-controlled randomized clinical trial. Am J Psychiatry. 2018;175(4):327-335.

Grunebaum et al³ evaluated the acute effect of adjunctive subanesthetic IV keta­mine on clinically significant suicidal ideation in patients with MDD, with a comparison arm that received an infusion of midazolam.

Study design

• 80 inpatients (age 18 to 65 years) with MDD who had a score ≥16 on the Hamilton Depression Rating Scale (HAM-D) and a score ≥4 on the Scale for Suicidal Ideation (SSI). Approximately one-half (54%) were taking an antidepressant
• Patients were randomly assigned to IV racemic ketamine hydrochloride, .5 mg/kg, or IV midazolam, .02 mg/kg, both administered in 100 mL normal saline over 40 minutes.

Outcomes

• Scale for Suicidal Ideation scores were assessed at screening, before infusion, 230 minutes after infusion, 24 hours after infusion, and after 1 to 6 weeks of follow-up. The average SSI score on Day 1 was 4.96 points lower in the ketamine group compared with the midazolam group. The proportion of responders (defined as patients who experienced a 50% reduction in SSI score) on Day 1 was 55% for patients in the ketamine group compared with 30% in the midazolam group.

Conclusion

• Compared with midazolam, ketamine produced a greater clinically meaningful reduction in suicidal ideation 24 hours after infusion.

Apart from the primary outcome of reduction in suicidal ideation, greater reductions were also found in overall mood disturbance, depression subscale, and fatigue subscale scores as assessed on the Profile of Mood States (POMS). Although the study noted improvement in depression scores, the proportion of responders on Day 1 in depression scales, including HAM-D and the self-rated Beck Depression Inventory, fell short of statistical significance. Overall, compared with the midazolam infusion, a single adjunctive subanesthetic ketamine infusion was associated with a greater clinically significant reduction in suicidal ideation on Day 1.

Continue to: Ketamine

Ketamine: Review and meta-analysis

Wilkinson et al⁴ conducted a systematic review and individual participant data meta-analysis of 11 similar comparison intervention studies examining the effects of ketamine in reducing suicidal thoughts.

2. Wilkinson ST, Ballard ED, Bloch MH, et al. The effect of a single dose of intravenous ketamine on suicidal ideation: a systematic review and individual participant data meta-analysis. Am J Psychiatry. 2018;175(2):150-158.

Study design

• Review of 11 studies of a single dose of IV ketamine for treatment of any psychi­atric disorder. Only comparison intervention trials using saline placebo or midazolam were included:
• Individual patient-level data of 298 patients were obtained from 10 of the 11 trials. Analysis was performed on 167 patients who had suicidal ideation at baseline.
• Results were assessed by clinician-administered rating scales.

Outcomes

• Ketamine reduced suicidal ideation more rapidly compared with control infusions as assessed by the Montgomery-Åsberg Depression Rating Scale (MADRS) and HAM-D, with significant benefits appearing on Day 1 and extending up to Day 7. The mean MADRS score in the ketamine group decreased to 19.5 from 33.8 within 1 day of infusion, compared with a reduction to 29.2 from 32.9 in the control groups.
• The number needed to treat to be free of suicidal ideation for ketamine (compared with control) was 3.1 to 4.0 for all time points in the first week after infusion.

Conclusion

• This meta-analysis provided evidence from the largest sample to date (N = 298) that ketamine reduces suicidal ideation partially independently of mood symptoms.

While the anti-suicidal effects of ketamine appear to be robust in the above studies, the possibility of rebound suicidal ideation remains in the weeks or months following exposure. Also, these studies only prove a reduction in suicidal ideation; reduction in suicidal behavior was not studied. Nevertheless, ketamine holds considerable promise as a potential rapid-acting agent in patients at risk of suicide.

Continue to: Strategies for augmentation or switching

Only one-third of the patients with depression achieve remission on the first antidepressant medication. The American Psychiatric Association’s current management guidelines² for patients who do not respond to the first-choice antidepressant include multiple options. Switching strategies recommended in these guidelines include changing to an antidepressant of the same class, or to one from a different class (eg, from a selective serotonin reuptake inhibitor [SSRI] to a serotonin-norepinephrine reuptake inhibitor, or from an SSRI to a tricyclic antidepressant). Augmentation strategies include augmenting with a non-monoamine oxidase inhibitor antidepressant from a different class, lithium, thyroid hormone, or an atypical antipsychotic.

The VAST-D trial⁵ evaluated the relative effectiveness and safety of 3 common treatments for treatment-resistant MDD:

• switching to bupropion
• augmenting the current treatment with bupropion
• augmenting the current treatment with the second-generation antipsychotic aripiprazole.

3. Mohamed S, Johnson GR, Chen P, et al. Effect of antidepressant switching vs augmentation on remission among patients with major depressive disorder unresponsive to antidepressant treatment: the VAST-D randomized clinical trial. JAMA. 2017;318(2):132-145.

Study design

• A multi-site, randomized, single-blind, parallel-assignment trial of 1,522 patients at 35 US Veteran Health Administration medical centers with nonpsychotic MDD with a suboptimal response to at least one antidepressant (defined as a score of ≥16 on the Quick Inventory Depressive Symptomatology-Clinician Rated questionnaire [QIDS-C16]).
• Participants were randomly assigned to 1 of 3 groups: switching to bupropion (n = 511), augmenting with bupropion (n = 506), or augmenting with aripiprazole (n = 505).
• The primary outcome was remission (defined as a QIDS-C16 score ≤5 at 2 consecutively scheduled follow-up visits). Secondary outcome was a reduction in QIDS-C16 score by ≥50%, or a Clinical Global Impression (CGI) Improvement scale score of 1 (very much improved) or 2 (much improved).

Outcomes

• The aripiprazole group showed a modest, statistically significant remission rate (28.9%) compared with the bupropion switch group (22.3%), but did not show any statistically significant difference compared with the bupropion augmentation group.

• For the secondary outcome, there was a significantly higher response rate in the aripiprazole group (74.3%) compared with the bupropion switch group (62.4%) and bupropion augmentation group (65.6%). Response measured by the CGI– Improvement scale score also favored the aripiprazole group (79%) compared with the bupropion switch group (70%) and bupropion augmentation group (74%).

Continue to: Conclusion

Conclusion

• Overall, the study found a statistically significant but modest increased likelihood of remission during 12 weeks of augmentation treatment with aripiprazole, compared with switching to bupropion monotherapy.

The studies discussed here, which are summarized in the Table,^3-5 provide some potential avenues for research into interventions for patients who are acutely suicidal and those with treatment-resistant depression. Further research into long-term outcomes and adverse effects of ketamine use for suicidality in patients with depression is needed. The VAST-D trial suggests a need for further exploration into the efficacy of augmentation with second-generation antipsychotics for treatment-resistant depression.

An estimated 7.1% of the adults in United States had a major depressive episode in 2017, and this prevalence has been trending upward over the past few years.¹ The prevalence is even higher in adults between age 18 and 25 (13.1%).¹ Like other psychiatric diagnoses, major depressive disorder (MDD) has a significant impact on productivity as well as daily functioning. Only one-third of patients with MDD achieve remission on the first antidepressant medication.² This leaves an estimated 11.47 million people in the United States in need of an alternate regimen for management of their depressive episode.

The data on evidence-based biologic treatments for treatment-resistant depression are limited (other than for electroconvulsive therapy). Pharmacologic options include switching to a different medication, combining medications, and augmentation strategies or novel approaches such as ketamine and related agents. Here we summarize the findings from 3 recent studies that investigate alternate management options for MDD.

Ketamine: Randomized controlled trial

Traditional antidepressants may reduce suicidal ideation by improving depressive symptoms, but this effect may take weeks. Ketamine, an N-methyl-D-aspartate antagonist, has become a target of research for its antidepressant effects at subanesthetic doses.

_

1. Grunebaum MF, Galfalvy HC, Choo TH, et al. Ketamine for rapid reduction of suicidal thoughts in major depression: a midazolam-controlled randomized clinical trial. Am J Psychiatry. 2018;175(4):327-335.

Grunebaum et al³ evaluated the acute effect of adjunctive subanesthetic IV keta­mine on clinically significant suicidal ideation in patients with MDD, with a comparison arm that received an infusion of midazolam.

Study design

• 80 inpatients (age 18 to 65 years) with MDD who had a score ≥16 on the Hamilton Depression Rating Scale (HAM-D) and a score ≥4 on the Scale for Suicidal Ideation (SSI). Approximately one-half (54%) were taking an antidepressant
• Patients were randomly assigned to IV racemic ketamine hydrochloride, .5 mg/kg, or IV midazolam, .02 mg/kg, both administered in 100 mL normal saline over 40 minutes.

Outcomes

• Scale for Suicidal Ideation scores were assessed at screening, before infusion, 230 minutes after infusion, 24 hours after infusion, and after 1 to 6 weeks of follow-up. The average SSI score on Day 1 was 4.96 points lower in the ketamine group compared with the midazolam group. The proportion of responders (defined as patients who experienced a 50% reduction in SSI score) on Day 1 was 55% for patients in the ketamine group compared with 30% in the midazolam group.

Conclusion

• Compared with midazolam, ketamine produced a greater clinically meaningful reduction in suicidal ideation 24 hours after infusion.

Apart from the primary outcome of reduction in suicidal ideation, greater reductions were also found in overall mood disturbance, depression subscale, and fatigue subscale scores as assessed on the Profile of Mood States (POMS). Although the study noted improvement in depression scores, the proportion of responders on Day 1 in depression scales, including HAM-D and the self-rated Beck Depression Inventory, fell short of statistical significance. Overall, compared with the midazolam infusion, a single adjunctive subanesthetic ketamine infusion was associated with a greater clinically significant reduction in suicidal ideation on Day 1.

Continue to: Ketamine

Ketamine: Review and meta-analysis

Wilkinson et al⁴ conducted a systematic review and individual participant data meta-analysis of 11 similar comparison intervention studies examining the effects of ketamine in reducing suicidal thoughts.

2. Wilkinson ST, Ballard ED, Bloch MH, et al. The effect of a single dose of intravenous ketamine on suicidal ideation: a systematic review and individual participant data meta-analysis. Am J Psychiatry. 2018;175(2):150-158.

Study design

• Review of 11 studies of a single dose of IV ketamine for treatment of any psychi­atric disorder. Only comparison intervention trials using saline placebo or midazolam were included:
• Individual patient-level data of 298 patients were obtained from 10 of the 11 trials. Analysis was performed on 167 patients who had suicidal ideation at baseline.
• Results were assessed by clinician-administered rating scales.

Outcomes

• Ketamine reduced suicidal ideation more rapidly compared with control infusions as assessed by the Montgomery-Åsberg Depression Rating Scale (MADRS) and HAM-D, with significant benefits appearing on Day 1 and extending up to Day 7. The mean MADRS score in the ketamine group decreased to 19.5 from 33.8 within 1 day of infusion, compared with a reduction to 29.2 from 32.9 in the control groups.
• The number needed to treat to be free of suicidal ideation for ketamine (compared with control) was 3.1 to 4.0 for all time points in the first week after infusion.

Conclusion

• This meta-analysis provided evidence from the largest sample to date (N = 298) that ketamine reduces suicidal ideation partially independently of mood symptoms.

While the anti-suicidal effects of ketamine appear to be robust in the above studies, the possibility of rebound suicidal ideation remains in the weeks or months following exposure. Also, these studies only prove a reduction in suicidal ideation; reduction in suicidal behavior was not studied. Nevertheless, ketamine holds considerable promise as a potential rapid-acting agent in patients at risk of suicide.

Continue to: Strategies for augmentation or switching

Only one-third of the patients with depression achieve remission on the first antidepressant medication. The American Psychiatric Association’s current management guidelines² for patients who do not respond to the first-choice antidepressant include multiple options. Switching strategies recommended in these guidelines include changing to an antidepressant of the same class, or to one from a different class (eg, from a selective serotonin reuptake inhibitor [SSRI] to a serotonin-norepinephrine reuptake inhibitor, or from an SSRI to a tricyclic antidepressant). Augmentation strategies include augmenting with a non-monoamine oxidase inhibitor antidepressant from a different class, lithium, thyroid hormone, or an atypical antipsychotic.

The VAST-D trial⁵ evaluated the relative effectiveness and safety of 3 common treatments for treatment-resistant MDD:

• switching to bupropion
• augmenting the current treatment with bupropion
• augmenting the current treatment with the second-generation antipsychotic aripiprazole.

3. Mohamed S, Johnson GR, Chen P, et al. Effect of antidepressant switching vs augmentation on remission among patients with major depressive disorder unresponsive to antidepressant treatment: the VAST-D randomized clinical trial. JAMA. 2017;318(2):132-145.

Study design

• A multi-site, randomized, single-blind, parallel-assignment trial of 1,522 patients at 35 US Veteran Health Administration medical centers with nonpsychotic MDD with a suboptimal response to at least one antidepressant (defined as a score of ≥16 on the Quick Inventory Depressive Symptomatology-Clinician Rated questionnaire [QIDS-C16]).
• Participants were randomly assigned to 1 of 3 groups: switching to bupropion (n = 511), augmenting with bupropion (n = 506), or augmenting with aripiprazole (n = 505).
• The primary outcome was remission (defined as a QIDS-C16 score ≤5 at 2 consecutively scheduled follow-up visits). Secondary outcome was a reduction in QIDS-C16 score by ≥50%, or a Clinical Global Impression (CGI) Improvement scale score of 1 (very much improved) or 2 (much improved).

Outcomes

• The aripiprazole group showed a modest, statistically significant remission rate (28.9%) compared with the bupropion switch group (22.3%), but did not show any statistically significant difference compared with the bupropion augmentation group.

• For the secondary outcome, there was a significantly higher response rate in the aripiprazole group (74.3%) compared with the bupropion switch group (62.4%) and bupropion augmentation group (65.6%). Response measured by the CGI– Improvement scale score also favored the aripiprazole group (79%) compared with the bupropion switch group (70%) and bupropion augmentation group (74%).

Continue to: Conclusion

Conclusion

• Overall, the study found a statistically significant but modest increased likelihood of remission during 12 weeks of augmentation treatment with aripiprazole, compared with switching to bupropion monotherapy.

The studies discussed here, which are summarized in the Table,^3-5 provide some potential avenues for research into interventions for patients who are acutely suicidal and those with treatment-resistant depression. Further research into long-term outcomes and adverse effects of ketamine use for suicidality in patients with depression is needed. The VAST-D trial suggests a need for further exploration into the efficacy of augmentation with second-generation antipsychotics for treatment-resistant depression.

An estimated 7.1% of the adults in United States had a major depressive episode in 2017, and this prevalence has been trending upward over the past few years.¹ The prevalence is even higher in adults between age 18 and 25 (13.1%).¹ Like other psychiatric diagnoses, major depressive disorder (MDD) has a significant impact on productivity as well as daily functioning. Only one-third of patients with MDD achieve remission on the first antidepressant medication.² This leaves an estimated 11.47 million people in the United States in need of an alternate regimen for management of their depressive episode.

The data on evidence-based biologic treatments for treatment-resistant depression are limited (other than for electroconvulsive therapy). Pharmacologic options include switching to a different medication, combining medications, and augmentation strategies or novel approaches such as ketamine and related agents. Here we summarize the findings from 3 recent studies that investigate alternate management options for MDD.

Ketamine: Randomized controlled trial

Traditional antidepressants may reduce suicidal ideation by improving depressive symptoms, but this effect may take weeks. Ketamine, an N-methyl-D-aspartate antagonist, has become a target of research for its antidepressant effects at subanesthetic doses.

_

1. Grunebaum MF, Galfalvy HC, Choo TH, et al. Ketamine for rapid reduction of suicidal thoughts in major depression: a midazolam-controlled randomized clinical trial. Am J Psychiatry. 2018;175(4):327-335.

Grunebaum et al³ evaluated the acute effect of adjunctive subanesthetic IV keta­mine on clinically significant suicidal ideation in patients with MDD, with a comparison arm that received an infusion of midazolam.

Study design

• 80 inpatients (age 18 to 65 years) with MDD who had a score ≥16 on the Hamilton Depression Rating Scale (HAM-D) and a score ≥4 on the Scale for Suicidal Ideation (SSI). Approximately one-half (54%) were taking an antidepressant
• Patients were randomly assigned to IV racemic ketamine hydrochloride, .5 mg/kg, or IV midazolam, .02 mg/kg, both administered in 100 mL normal saline over 40 minutes.

Outcomes

• Scale for Suicidal Ideation scores were assessed at screening, before infusion, 230 minutes after infusion, 24 hours after infusion, and after 1 to 6 weeks of follow-up. The average SSI score on Day 1 was 4.96 points lower in the ketamine group compared with the midazolam group. The proportion of responders (defined as patients who experienced a 50% reduction in SSI score) on Day 1 was 55% for patients in the ketamine group compared with 30% in the midazolam group.

Conclusion

• Compared with midazolam, ketamine produced a greater clinically meaningful reduction in suicidal ideation 24 hours after infusion.

Apart from the primary outcome of reduction in suicidal ideation, greater reductions were also found in overall mood disturbance, depression subscale, and fatigue subscale scores as assessed on the Profile of Mood States (POMS). Although the study noted improvement in depression scores, the proportion of responders on Day 1 in depression scales, including HAM-D and the self-rated Beck Depression Inventory, fell short of statistical significance. Overall, compared with the midazolam infusion, a single adjunctive subanesthetic ketamine infusion was associated with a greater clinically significant reduction in suicidal ideation on Day 1.

Continue to: Ketamine

Ketamine: Review and meta-analysis

Wilkinson et al⁴ conducted a systematic review and individual participant data meta-analysis of 11 similar comparison intervention studies examining the effects of ketamine in reducing suicidal thoughts.

2. Wilkinson ST, Ballard ED, Bloch MH, et al. The effect of a single dose of intravenous ketamine on suicidal ideation: a systematic review and individual participant data meta-analysis. Am J Psychiatry. 2018;175(2):150-158.

Study design

• Review of 11 studies of a single dose of IV ketamine for treatment of any psychi­atric disorder. Only comparison intervention trials using saline placebo or midazolam were included:
• Individual patient-level data of 298 patients were obtained from 10 of the 11 trials. Analysis was performed on 167 patients who had suicidal ideation at baseline.
• Results were assessed by clinician-administered rating scales.

Outcomes

• Ketamine reduced suicidal ideation more rapidly compared with control infusions as assessed by the Montgomery-Åsberg Depression Rating Scale (MADRS) and HAM-D, with significant benefits appearing on Day 1 and extending up to Day 7. The mean MADRS score in the ketamine group decreased to 19.5 from 33.8 within 1 day of infusion, compared with a reduction to 29.2 from 32.9 in the control groups.
• The number needed to treat to be free of suicidal ideation for ketamine (compared with control) was 3.1 to 4.0 for all time points in the first week after infusion.

Conclusion

• This meta-analysis provided evidence from the largest sample to date (N = 298) that ketamine reduces suicidal ideation partially independently of mood symptoms.

While the anti-suicidal effects of ketamine appear to be robust in the above studies, the possibility of rebound suicidal ideation remains in the weeks or months following exposure. Also, these studies only prove a reduction in suicidal ideation; reduction in suicidal behavior was not studied. Nevertheless, ketamine holds considerable promise as a potential rapid-acting agent in patients at risk of suicide.

Continue to: Strategies for augmentation or switching

Only one-third of the patients with depression achieve remission on the first antidepressant medication. The American Psychiatric Association’s current management guidelines² for patients who do not respond to the first-choice antidepressant include multiple options. Switching strategies recommended in these guidelines include changing to an antidepressant of the same class, or to one from a different class (eg, from a selective serotonin reuptake inhibitor [SSRI] to a serotonin-norepinephrine reuptake inhibitor, or from an SSRI to a tricyclic antidepressant). Augmentation strategies include augmenting with a non-monoamine oxidase inhibitor antidepressant from a different class, lithium, thyroid hormone, or an atypical antipsychotic.

The VAST-D trial⁵ evaluated the relative effectiveness and safety of 3 common treatments for treatment-resistant MDD:

• switching to bupropion
• augmenting the current treatment with bupropion
• augmenting the current treatment with the second-generation antipsychotic aripiprazole.

3. Mohamed S, Johnson GR, Chen P, et al. Effect of antidepressant switching vs augmentation on remission among patients with major depressive disorder unresponsive to antidepressant treatment: the VAST-D randomized clinical trial. JAMA. 2017;318(2):132-145.

Study design

• A multi-site, randomized, single-blind, parallel-assignment trial of 1,522 patients at 35 US Veteran Health Administration medical centers with nonpsychotic MDD with a suboptimal response to at least one antidepressant (defined as a score of ≥16 on the Quick Inventory Depressive Symptomatology-Clinician Rated questionnaire [QIDS-C16]).
• Participants were randomly assigned to 1 of 3 groups: switching to bupropion (n = 511), augmenting with bupropion (n = 506), or augmenting with aripiprazole (n = 505).
• The primary outcome was remission (defined as a QIDS-C16 score ≤5 at 2 consecutively scheduled follow-up visits). Secondary outcome was a reduction in QIDS-C16 score by ≥50%, or a Clinical Global Impression (CGI) Improvement scale score of 1 (very much improved) or 2 (much improved).

Outcomes

• The aripiprazole group showed a modest, statistically significant remission rate (28.9%) compared with the bupropion switch group (22.3%), but did not show any statistically significant difference compared with the bupropion augmentation group.

• For the secondary outcome, there was a significantly higher response rate in the aripiprazole group (74.3%) compared with the bupropion switch group (62.4%) and bupropion augmentation group (65.6%). Response measured by the CGI– Improvement scale score also favored the aripiprazole group (79%) compared with the bupropion switch group (70%) and bupropion augmentation group (74%).

Continue to: Conclusion

Conclusion

• Overall, the study found a statistically significant but modest increased likelihood of remission during 12 weeks of augmentation treatment with aripiprazole, compared with switching to bupropion monotherapy.

The studies discussed here, which are summarized in the Table,^3-5 provide some potential avenues for research into interventions for patients who are acutely suicidal and those with treatment-resistant depression. Further research into long-term outcomes and adverse effects of ketamine use for suicidality in patients with depression is needed. The VAST-D trial suggests a need for further exploration into the efficacy of augmentation with second-generation antipsychotics for treatment-resistant depression.