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A new . But it also showed the extent to which research is lacking.
“There’s not as much out there as one might expect, given that this is the most common dermatologic disease and one of the most burdensome diseases worldwide,” said Katrina Abuabara, MD, of the department of dermatology at the University of California, San Francisco, one of the senior authors of the review.
“There’s a genetic predisposition to AD, but it’s certainly very environmentally patterned,” she said in an interview. “Given that we know there are strong environmental influences, it’s an obvious example of how climate change affects our health ... It is one that may be underappreciated and that could give us near-term information.”
Indeed, she and her coauthors emphasized in their paper, “AD could serve as a case study for climatic impacts on health.” The review, which looked beyond the realm of air pollution, was published in Allergy, the journal of the European Academy of Allergy and Clinical Immunology.
Dr. Abuabara, UCSF dermatologist Sheng-Pei Wang, MD, MPH, and their coauthors — dermatologists and others from the United States, Europe, Brazil, and India — were convened by the International Eczema Council and teamed up with a biologist and climate science expert, Camilo Mora, PhD, of the University of Hawaii at Mānoa, Honolulu. Because research to date has focused on air pollution, with the impact of other hazards that Dr. Abuabara said were “a lot less developed and organized,” they used a framework and search strategy developed by Dr. Mora that looks at 10 climatic hazards related to greenhouse gas emissions, including heat waves, drought, precipitation, wildfires, and sea level rise.
“Given that this [framework] was already out there in the literature, we thought it would give us a structure and a nice way to organize the literature,” Dr. Abuabara said. While the literature is too heterogeneous for a systematic review and meta-analysis, the researchers used a systematic approach, she explained.
Lawrence Eichenfield, MD, professor of dermatology and pediatrics at the University of California, San Diego, and a coauthor of the paper, said in an e-mail that the review raises “our consciousness about how these [climate] changes may be impacting atopic dermatitis.”
Researchers have “much work to do to understand the evolving impact on AD development and course, and even more to figure out how to avoid extreme weather’s impact to minimize its effects on inflammatory skin diseases,” he said. “In the meantime, this paper is a call for the health care community to recognize a set of factors that can influence our patients’ dermatitis and lives.”
Mixed Results, But Negative Impacts Overall
The researchers identified 18 studies across most of the 10 climatic hazards with evidence for an impact on AD, the majority of which demonstrated harmful effects on various aspects of AD — most commonly on AD-related health care utilization and severity/flares. Only three of the studies examined AD prevalence and notably, none looked at incidence.
The impact of climatic hazards on AD appears to vary depending on the geographic region and its baseline climate, the authors said. A study in South Korea, for instance, found that in areas declared as disaster zones after storms and heavy rains, the number of AD-related outpatient visits increased for all ages. And a study in the United States showed an increased prevalence of childhood eczema in states with higher mean annual precipitation. However, some other studies on precipitation found no associations.
Just as published studies on precipitation yielded mixed results, so have studies on warming temperatures, Dr. Abuabara and her colleagues reported in their paper, with higher temperatures found to be positively associated with severity of AD symptoms in a study among patients with AD living in a region of Southern Italy, but decreased AD-related health care utilization in a study in Denmark.
In another study of over 5,500 children enrolled in an eczema registry in the United States between 2004 and 2012, higher temperature (odds ratio [OR] = 0.90, P < .001) and increased sun exposure (OR = 0.93, P = .009) were associated with poorly controlled eczema, after the researchers controlled for gender, race, income, and topical medication use.
Studies From 10 Countries Reviewed
Across the 18 studies identified in the review, data were collected in 10 countries. Five studies were conducted in the United States, one used global data, six were from Asia, and the others were from Europe and Africa. Data are lacking, the researchers wrote, in many parts of the world, including coastal regions of the tropics that are projected to experience the largest cumulative climatic hazards.
Future research should not only cover more geographic areas — especially those most impacted by climate change — but should examine impacts on AD incidence, prevalence, and “long-term monitoring of disease activity over time at the individual level,” the researchers recommended. Research should also aim to integrate multiple climatic factors and types of climate data, they said.
“As researchers, we always like to distill things down, but with climatic hazards like warming, you have to integrate other factors such as what the baseline temperature is and how precipitation is involved,” Dr. Abuabara said in the interview. With precipitation, similarly, associated factors such as outdoor humidity, pollen, and pollution exposure may also be at play for AD. Overall, she said, “you have to integrate many types of data.”
In addition to their literature review, the researchers created maps comparing the past, present, and future burden of climatic hazards to AD prevalence data. One pair of maps illustrates global cumulative exposure to climatic hazards in 2005 in parallel with the estimated annual change in AD prevalence in the subsequent decade. “It’s meant to be descriptive,” Dr. Abuabara said in the interview. The maps show alignment “between the areas experiencing the most climatic hazards and those where we subsequently saw the most rapid changes in AD.”
The paper also describes how climatic factors impact skin physiology and AD — exacerbating barrier impairment, immune dysregulation, dysbiosis, and pruritus — and how there are differential impacts on vulnerable and displaced populations with AD. It also briefly addresses air pollution, which was not included in the review framework but is impacted by wildfire and other included climatic factors.
The Need to Better Track AD, Anticipate Clinical Impact
“Outside of epidemiology, [clinicians and others] may not realize we actually have fairly poor measures of prevalence and severity of AD and disease flare over time,” Dr. Abuabara said. So “improving the ways we can measure this disease and getting more detailed data is important” for assessing the impact of climate changes.
More skin measures should be incorporated into large national health surveys, for one. “Skin doesn’t come to mind as much as diseases like heart disease and diabetes,” she said, and when surveys ask about AD, “they often don’t ask specific enough questions or ask about severity.” The clinical impacts of adverse climatic changes and extreme weather events — sudden therapy interruption, particularly of systemic agents, and delayed treatment, for instance — should be reflected in the planning and provision of dermatology services, Dr. Abuabara and her coauthors wrote.
There are currently no evidence-based recommendations for what patients with AD can do differently when faced with wildfire smoke or other climatic hazards, other than general recommendations, for instance, to reduce exposure to wildfire smoke and aeroallergens, she said in the interview. But “overall, the field has moved to more proactive treatment patterns ... toward providing anticipatory guidance and having individualized treatment plans that give people the tools to be ready to step things up or counteract [flares or worsening] if they need to.”
She and her San Francisco–based coauthors have already experienced the impact of wildfires firsthand. “It was amazing — in the period right after a major wildfire hundreds of miles away from the Bay area, we saw a huge spike in visits for itch and for eczema,” she said, referring to research on AD clinic visits after the 2018 California Camp Fire. “It showed up dramatically in the data,” said Dr. Abuabara, one of the authors of that study.
[embed:render:related:node:254804]
The new review adds to a growing body of literature documenting health impacts of climate change and advocating for action. In September 2021, more than 230 medical journals, including the New England Journal of Medicine — though not any dermatology journals — published an editorial calling for emergency action to limit global warming and protect health.
The following year, a commentary published across four dermatology journals discussed current and future impacts of climate change and urged dermatologists to become more engaged in finding solutions to help mitigate and adapt to climate change.
More recently, dermatologists have published about the environmental impact of professional practices such as print journals and meeting samples using single-use plastics.
Dr. Abuabara disclosed to Allergy that she is a consultant for TARGET RWE and Amgen and that her institution receives grants for research from Pfizer and LaRoche Posay. Dr. Eichenfield reported serving as a scientific adviser, consultant, and/or study investigator for Pfizer, AbbVie, Amgen and other companies. Dr. Wang disclosed that she is an International Eczema Council Fellow with financial support from Abbvie. Other authors had multiple disclosures.
A new . But it also showed the extent to which research is lacking.
“There’s not as much out there as one might expect, given that this is the most common dermatologic disease and one of the most burdensome diseases worldwide,” said Katrina Abuabara, MD, of the department of dermatology at the University of California, San Francisco, one of the senior authors of the review.
“There’s a genetic predisposition to AD, but it’s certainly very environmentally patterned,” she said in an interview. “Given that we know there are strong environmental influences, it’s an obvious example of how climate change affects our health ... It is one that may be underappreciated and that could give us near-term information.”
Indeed, she and her coauthors emphasized in their paper, “AD could serve as a case study for climatic impacts on health.” The review, which looked beyond the realm of air pollution, was published in Allergy, the journal of the European Academy of Allergy and Clinical Immunology.
Dr. Abuabara, UCSF dermatologist Sheng-Pei Wang, MD, MPH, and their coauthors — dermatologists and others from the United States, Europe, Brazil, and India — were convened by the International Eczema Council and teamed up with a biologist and climate science expert, Camilo Mora, PhD, of the University of Hawaii at Mānoa, Honolulu. Because research to date has focused on air pollution, with the impact of other hazards that Dr. Abuabara said were “a lot less developed and organized,” they used a framework and search strategy developed by Dr. Mora that looks at 10 climatic hazards related to greenhouse gas emissions, including heat waves, drought, precipitation, wildfires, and sea level rise.
“Given that this [framework] was already out there in the literature, we thought it would give us a structure and a nice way to organize the literature,” Dr. Abuabara said. While the literature is too heterogeneous for a systematic review and meta-analysis, the researchers used a systematic approach, she explained.
Lawrence Eichenfield, MD, professor of dermatology and pediatrics at the University of California, San Diego, and a coauthor of the paper, said in an e-mail that the review raises “our consciousness about how these [climate] changes may be impacting atopic dermatitis.”
Researchers have “much work to do to understand the evolving impact on AD development and course, and even more to figure out how to avoid extreme weather’s impact to minimize its effects on inflammatory skin diseases,” he said. “In the meantime, this paper is a call for the health care community to recognize a set of factors that can influence our patients’ dermatitis and lives.”
Mixed Results, But Negative Impacts Overall
The researchers identified 18 studies across most of the 10 climatic hazards with evidence for an impact on AD, the majority of which demonstrated harmful effects on various aspects of AD — most commonly on AD-related health care utilization and severity/flares. Only three of the studies examined AD prevalence and notably, none looked at incidence.
The impact of climatic hazards on AD appears to vary depending on the geographic region and its baseline climate, the authors said. A study in South Korea, for instance, found that in areas declared as disaster zones after storms and heavy rains, the number of AD-related outpatient visits increased for all ages. And a study in the United States showed an increased prevalence of childhood eczema in states with higher mean annual precipitation. However, some other studies on precipitation found no associations.
Just as published studies on precipitation yielded mixed results, so have studies on warming temperatures, Dr. Abuabara and her colleagues reported in their paper, with higher temperatures found to be positively associated with severity of AD symptoms in a study among patients with AD living in a region of Southern Italy, but decreased AD-related health care utilization in a study in Denmark.
In another study of over 5,500 children enrolled in an eczema registry in the United States between 2004 and 2012, higher temperature (odds ratio [OR] = 0.90, P < .001) and increased sun exposure (OR = 0.93, P = .009) were associated with poorly controlled eczema, after the researchers controlled for gender, race, income, and topical medication use.
Studies From 10 Countries Reviewed
Across the 18 studies identified in the review, data were collected in 10 countries. Five studies were conducted in the United States, one used global data, six were from Asia, and the others were from Europe and Africa. Data are lacking, the researchers wrote, in many parts of the world, including coastal regions of the tropics that are projected to experience the largest cumulative climatic hazards.
Future research should not only cover more geographic areas — especially those most impacted by climate change — but should examine impacts on AD incidence, prevalence, and “long-term monitoring of disease activity over time at the individual level,” the researchers recommended. Research should also aim to integrate multiple climatic factors and types of climate data, they said.
“As researchers, we always like to distill things down, but with climatic hazards like warming, you have to integrate other factors such as what the baseline temperature is and how precipitation is involved,” Dr. Abuabara said in the interview. With precipitation, similarly, associated factors such as outdoor humidity, pollen, and pollution exposure may also be at play for AD. Overall, she said, “you have to integrate many types of data.”
In addition to their literature review, the researchers created maps comparing the past, present, and future burden of climatic hazards to AD prevalence data. One pair of maps illustrates global cumulative exposure to climatic hazards in 2005 in parallel with the estimated annual change in AD prevalence in the subsequent decade. “It’s meant to be descriptive,” Dr. Abuabara said in the interview. The maps show alignment “between the areas experiencing the most climatic hazards and those where we subsequently saw the most rapid changes in AD.”
The paper also describes how climatic factors impact skin physiology and AD — exacerbating barrier impairment, immune dysregulation, dysbiosis, and pruritus — and how there are differential impacts on vulnerable and displaced populations with AD. It also briefly addresses air pollution, which was not included in the review framework but is impacted by wildfire and other included climatic factors.
The Need to Better Track AD, Anticipate Clinical Impact
“Outside of epidemiology, [clinicians and others] may not realize we actually have fairly poor measures of prevalence and severity of AD and disease flare over time,” Dr. Abuabara said. So “improving the ways we can measure this disease and getting more detailed data is important” for assessing the impact of climate changes.
More skin measures should be incorporated into large national health surveys, for one. “Skin doesn’t come to mind as much as diseases like heart disease and diabetes,” she said, and when surveys ask about AD, “they often don’t ask specific enough questions or ask about severity.” The clinical impacts of adverse climatic changes and extreme weather events — sudden therapy interruption, particularly of systemic agents, and delayed treatment, for instance — should be reflected in the planning and provision of dermatology services, Dr. Abuabara and her coauthors wrote.
There are currently no evidence-based recommendations for what patients with AD can do differently when faced with wildfire smoke or other climatic hazards, other than general recommendations, for instance, to reduce exposure to wildfire smoke and aeroallergens, she said in the interview. But “overall, the field has moved to more proactive treatment patterns ... toward providing anticipatory guidance and having individualized treatment plans that give people the tools to be ready to step things up or counteract [flares or worsening] if they need to.”
She and her San Francisco–based coauthors have already experienced the impact of wildfires firsthand. “It was amazing — in the period right after a major wildfire hundreds of miles away from the Bay area, we saw a huge spike in visits for itch and for eczema,” she said, referring to research on AD clinic visits after the 2018 California Camp Fire. “It showed up dramatically in the data,” said Dr. Abuabara, one of the authors of that study.
[embed:render:related:node:254804]
The new review adds to a growing body of literature documenting health impacts of climate change and advocating for action. In September 2021, more than 230 medical journals, including the New England Journal of Medicine — though not any dermatology journals — published an editorial calling for emergency action to limit global warming and protect health.
The following year, a commentary published across four dermatology journals discussed current and future impacts of climate change and urged dermatologists to become more engaged in finding solutions to help mitigate and adapt to climate change.
More recently, dermatologists have published about the environmental impact of professional practices such as print journals and meeting samples using single-use plastics.
Dr. Abuabara disclosed to Allergy that she is a consultant for TARGET RWE and Amgen and that her institution receives grants for research from Pfizer and LaRoche Posay. Dr. Eichenfield reported serving as a scientific adviser, consultant, and/or study investigator for Pfizer, AbbVie, Amgen and other companies. Dr. Wang disclosed that she is an International Eczema Council Fellow with financial support from Abbvie. Other authors had multiple disclosures.
A new . But it also showed the extent to which research is lacking.
“There’s not as much out there as one might expect, given that this is the most common dermatologic disease and one of the most burdensome diseases worldwide,” said Katrina Abuabara, MD, of the department of dermatology at the University of California, San Francisco, one of the senior authors of the review.
“There’s a genetic predisposition to AD, but it’s certainly very environmentally patterned,” she said in an interview. “Given that we know there are strong environmental influences, it’s an obvious example of how climate change affects our health ... It is one that may be underappreciated and that could give us near-term information.”
Indeed, she and her coauthors emphasized in their paper, “AD could serve as a case study for climatic impacts on health.” The review, which looked beyond the realm of air pollution, was published in Allergy, the journal of the European Academy of Allergy and Clinical Immunology.
Dr. Abuabara, UCSF dermatologist Sheng-Pei Wang, MD, MPH, and their coauthors — dermatologists and others from the United States, Europe, Brazil, and India — were convened by the International Eczema Council and teamed up with a biologist and climate science expert, Camilo Mora, PhD, of the University of Hawaii at Mānoa, Honolulu. Because research to date has focused on air pollution, with the impact of other hazards that Dr. Abuabara said were “a lot less developed and organized,” they used a framework and search strategy developed by Dr. Mora that looks at 10 climatic hazards related to greenhouse gas emissions, including heat waves, drought, precipitation, wildfires, and sea level rise.
“Given that this [framework] was already out there in the literature, we thought it would give us a structure and a nice way to organize the literature,” Dr. Abuabara said. While the literature is too heterogeneous for a systematic review and meta-analysis, the researchers used a systematic approach, she explained.
Lawrence Eichenfield, MD, professor of dermatology and pediatrics at the University of California, San Diego, and a coauthor of the paper, said in an e-mail that the review raises “our consciousness about how these [climate] changes may be impacting atopic dermatitis.”
Researchers have “much work to do to understand the evolving impact on AD development and course, and even more to figure out how to avoid extreme weather’s impact to minimize its effects on inflammatory skin diseases,” he said. “In the meantime, this paper is a call for the health care community to recognize a set of factors that can influence our patients’ dermatitis and lives.”
Mixed Results, But Negative Impacts Overall
The researchers identified 18 studies across most of the 10 climatic hazards with evidence for an impact on AD, the majority of which demonstrated harmful effects on various aspects of AD — most commonly on AD-related health care utilization and severity/flares. Only three of the studies examined AD prevalence and notably, none looked at incidence.
The impact of climatic hazards on AD appears to vary depending on the geographic region and its baseline climate, the authors said. A study in South Korea, for instance, found that in areas declared as disaster zones after storms and heavy rains, the number of AD-related outpatient visits increased for all ages. And a study in the United States showed an increased prevalence of childhood eczema in states with higher mean annual precipitation. However, some other studies on precipitation found no associations.
Just as published studies on precipitation yielded mixed results, so have studies on warming temperatures, Dr. Abuabara and her colleagues reported in their paper, with higher temperatures found to be positively associated with severity of AD symptoms in a study among patients with AD living in a region of Southern Italy, but decreased AD-related health care utilization in a study in Denmark.
In another study of over 5,500 children enrolled in an eczema registry in the United States between 2004 and 2012, higher temperature (odds ratio [OR] = 0.90, P < .001) and increased sun exposure (OR = 0.93, P = .009) were associated with poorly controlled eczema, after the researchers controlled for gender, race, income, and topical medication use.
Studies From 10 Countries Reviewed
Across the 18 studies identified in the review, data were collected in 10 countries. Five studies were conducted in the United States, one used global data, six were from Asia, and the others were from Europe and Africa. Data are lacking, the researchers wrote, in many parts of the world, including coastal regions of the tropics that are projected to experience the largest cumulative climatic hazards.
Future research should not only cover more geographic areas — especially those most impacted by climate change — but should examine impacts on AD incidence, prevalence, and “long-term monitoring of disease activity over time at the individual level,” the researchers recommended. Research should also aim to integrate multiple climatic factors and types of climate data, they said.
“As researchers, we always like to distill things down, but with climatic hazards like warming, you have to integrate other factors such as what the baseline temperature is and how precipitation is involved,” Dr. Abuabara said in the interview. With precipitation, similarly, associated factors such as outdoor humidity, pollen, and pollution exposure may also be at play for AD. Overall, she said, “you have to integrate many types of data.”
In addition to their literature review, the researchers created maps comparing the past, present, and future burden of climatic hazards to AD prevalence data. One pair of maps illustrates global cumulative exposure to climatic hazards in 2005 in parallel with the estimated annual change in AD prevalence in the subsequent decade. “It’s meant to be descriptive,” Dr. Abuabara said in the interview. The maps show alignment “between the areas experiencing the most climatic hazards and those where we subsequently saw the most rapid changes in AD.”
The paper also describes how climatic factors impact skin physiology and AD — exacerbating barrier impairment, immune dysregulation, dysbiosis, and pruritus — and how there are differential impacts on vulnerable and displaced populations with AD. It also briefly addresses air pollution, which was not included in the review framework but is impacted by wildfire and other included climatic factors.
The Need to Better Track AD, Anticipate Clinical Impact
“Outside of epidemiology, [clinicians and others] may not realize we actually have fairly poor measures of prevalence and severity of AD and disease flare over time,” Dr. Abuabara said. So “improving the ways we can measure this disease and getting more detailed data is important” for assessing the impact of climate changes.
More skin measures should be incorporated into large national health surveys, for one. “Skin doesn’t come to mind as much as diseases like heart disease and diabetes,” she said, and when surveys ask about AD, “they often don’t ask specific enough questions or ask about severity.” The clinical impacts of adverse climatic changes and extreme weather events — sudden therapy interruption, particularly of systemic agents, and delayed treatment, for instance — should be reflected in the planning and provision of dermatology services, Dr. Abuabara and her coauthors wrote.
There are currently no evidence-based recommendations for what patients with AD can do differently when faced with wildfire smoke or other climatic hazards, other than general recommendations, for instance, to reduce exposure to wildfire smoke and aeroallergens, she said in the interview. But “overall, the field has moved to more proactive treatment patterns ... toward providing anticipatory guidance and having individualized treatment plans that give people the tools to be ready to step things up or counteract [flares or worsening] if they need to.”
She and her San Francisco–based coauthors have already experienced the impact of wildfires firsthand. “It was amazing — in the period right after a major wildfire hundreds of miles away from the Bay area, we saw a huge spike in visits for itch and for eczema,” she said, referring to research on AD clinic visits after the 2018 California Camp Fire. “It showed up dramatically in the data,” said Dr. Abuabara, one of the authors of that study.
[embed:render:related:node:254804]
The new review adds to a growing body of literature documenting health impacts of climate change and advocating for action. In September 2021, more than 230 medical journals, including the New England Journal of Medicine — though not any dermatology journals — published an editorial calling for emergency action to limit global warming and protect health.
The following year, a commentary published across four dermatology journals discussed current and future impacts of climate change and urged dermatologists to become more engaged in finding solutions to help mitigate and adapt to climate change.
More recently, dermatologists have published about the environmental impact of professional practices such as print journals and meeting samples using single-use plastics.
Dr. Abuabara disclosed to Allergy that she is a consultant for TARGET RWE and Amgen and that her institution receives grants for research from Pfizer and LaRoche Posay. Dr. Eichenfield reported serving as a scientific adviser, consultant, and/or study investigator for Pfizer, AbbVie, Amgen and other companies. Dr. Wang disclosed that she is an International Eczema Council Fellow with financial support from Abbvie. Other authors had multiple disclosures.
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All rights reserved. This material may not be published, broadcast, copied, or otherwise reproduced or distributed without the prior written permission of Frontline Medical Communications Inc.</copyrightNotice> </rightsInfo> </provider> <abstract/> <metaDescription>review of the literature on climate change and atopic dermatitis (AD) found evidence of a broad and negative impact of climatic hazards on various aspects of AD</metaDescription> <articlePDF/> <teaserImage>282841</teaserImage> <teaser>The authors of the review — dermatologists and others from the United States, Europe, Brazil, and India — were convened by the <span class="Hyperlink">International Eczema Council</span> and teamed up with a climate science expert. </teaser> <title>Climate Change and AD: New Review Shows Negative Impacts and Unknowns</title> <deck/> <disclaimer/> <AuthorList/> <articleURL/> <doi/> <pubMedID/> <publishXMLStatus/> <publishXMLVersion>1</publishXMLVersion> <useEISSN>0</useEISSN> <urgency/> <pubPubdateYear/> <pubPubdateMonth/> <pubPubdateDay/> <pubVolume/> <pubNumber/> <wireChannels/> <primaryCMSID/> <CMSIDs/> <keywords/> <seeAlsos/> <publications_g> <publicationData> <publicationCode>skin</publicationCode> <pubIssueName/> <pubArticleType/> <pubTopics/> <pubCategories/> <pubSections/> </publicationData> <publicationData> <publicationCode>fp</publicationCode> <pubIssueName/> <pubArticleType/> <pubTopics/> <pubCategories/> <pubSections/> </publicationData> <publicationData> <publicationCode>im</publicationCode> <pubIssueName/> <pubArticleType/> <pubTopics/> <pubCategories/> <pubSections/> </publicationData> </publications_g> <publications> <term canonical="true">13</term> <term>15</term> <term>21</term> </publications> <sections> <term>27970</term> <term canonical="true">39313</term> </sections> <topics> <term canonical="true">189</term> <term>203</term> <term>271</term> <term>176</term> </topics> <links> <link> <itemClass qcode="ninat:picture"/> <altRep contenttype="image/jpeg">images/24010587.jpg</altRep> <description role="drol:caption">Dr. Katrina Abuabara</description> <description role="drol:credit">Dr. Abuabara</description> </link> <link> <itemClass qcode="ninat:picture"/> <altRep contenttype="image/jpeg">images/24007e9a.jpg</altRep> <description role="drol:caption">Dr. Lawrence F. Eichenfield</description> <description role="drol:credit">Courtesy University of California, San Diego</description> </link> <link> <itemClass qcode="ninat:picture"/> <altRep contenttype="image/jpeg">images/240126bf.jpg</altRep> <description role="drol:caption"/> <description role="drol:credit">angkhan/Getty Images</description> </link> </links> </header> <itemSet> <newsItem> <itemMeta> <itemRole>Main</itemRole> <itemClass>text</itemClass> <title>Climate Change and AD: New Review Shows Negative Impacts and Unknowns</title> <deck/> </itemMeta> <itemContent> <p>A new <span class="tag metaDescription">review of the literature on climate change and atopic dermatitis (AD) found evidence of a broad and negative impact of climatic hazards on various aspects of AD, including prevalence, severity/flares, and AD-related health care utilization</span>. But it also showed the extent to which research is lacking. </p> <p>“There’s not as much out there as one might expect, given that this is the most common dermatologic disease and one of the most burdensome diseases worldwide,” said <span class="Hyperlink"><a href="https://www.ucsfhealth.org/providers/dr-katrina-abuabara">Katrina Abuabara, MD</a></span>, of the department of dermatology at the University of California, San Francisco, one of the senior authors of the review. <br/><br/>[[{"fid":"282841","view_mode":"medstat_image_flush_right","fields":{"format":"medstat_image_flush_right","field_file_image_alt_text[und][0][value]":"Dr. Katrina Abuabara associate professor of dermatology and epidemiology, University of Californai, San Francisco.","field_file_image_credit[und][0][value]":"Dr. Abuabara","field_file_image_caption[und][0][value]":"Dr. Katrina Abuabara"},"type":"media","attributes":{"class":"media-element file-medstat_image_flush_right"}}]]“There’s a genetic predisposition to AD, but it’s certainly very environmentally patterned,” she said in an interview. “Given that we know there are strong environmental influences, it’s an obvious example of how climate change affects our health ... It is one that may be underappreciated and that could give us near-term information.” <br/><br/>Indeed, she and her coauthors emphasized in their paper, “AD could serve as a case study for climatic impacts on health.” The review, which looked beyond the realm of air pollution, <span class="Hyperlink"><a href="https://onlinelibrary.wiley.com/doi/10.1111/all.16007">was published</a></span> in <em>Allergy</em>, the journal of the European Academy of Allergy and Clinical Immunology. <br/><br/>Dr. Abuabara, UCSF dermatologist Sheng-Pei Wang, MD, MPH, and their coauthors — dermatologists and others from the United States, Europe, Brazil, and India — were convened by the <span class="Hyperlink"><a href="https://www.eczemacouncil.org/">International Eczema Council</a></span> and teamed up with a biologist and climate science expert, <span class="Hyperlink"><a href="https://geography.manoa.hawaii.edu/camilo-mora/">Camilo Mora, PhD</a></span>, of the University of Hawaii at Mānoa, Honolulu. Because research to date has focused on air pollution, with the impact of other hazards that Dr. Abuabara said were “a lot less developed and organized,” they used a framework and search strategy developed by Dr. Mora that looks at 10 climatic hazards related to greenhouse gas emissions, including heat waves, drought, precipitation, wildfires, and sea level rise.<br/><br/>“Given that this [framework] was already out there in the literature, we thought it would give us a structure and a nice way to organize the literature,” Dr. Abuabara said. While the literature is too heterogeneous for a systematic review and meta-analysis, the researchers used a systematic approach, she explained. <br/><br/><span class="Hyperlink"><a href="https://www.rchsd.org/doctors/lawrence-eichenfield-md/">Lawrence Eichenfield, MD</a></span>, professor of dermatology and pediatrics at the University of California, San Diego, and a coauthor of the paper, said in an e-mail that the review raises “our consciousness about how these [climate] changes may be impacting atopic dermatitis.”[[{"fid":"198663","view_mode":"medstat_image_flush_left","fields":{"format":"medstat_image_flush_left","field_file_image_alt_text[und][0][value]":"Dr. Lawrence F. Eichenfield, professor of dermatology and pediatrics at the University of California, San Diego, and Rady Children's Hospital, San Diego","field_file_image_credit[und][0][value]":"Courtesy University of California, San Diego","field_file_image_caption[und][0][value]":"Dr. Lawrence F. Eichenfield"},"type":"media","attributes":{"class":"media-element file-medstat_image_flush_left"}}]]<br/><br/>Researchers have “much work to do to understand the evolving impact on AD development and course, and even more to figure out how to avoid extreme weather’s impact to minimize its effects on inflammatory skin diseases,” he said. “In the meantime, this paper is a call for the health care community to recognize a set of factors that can influence our patients’ dermatitis and lives.” <br/><br/> <br/><br/></p> <h2>Mixed Results, But Negative Impacts Overall </h2> <p>The researchers identified 18 studies across most of the 10 climatic hazards with evidence for an impact on AD, the majority of which demonstrated harmful effects on various aspects of AD — most commonly on AD-related health care utilization and severity/flares. Only three of the studies examined AD prevalence and notably, none looked at incidence.</p> <p>[[{"fid":"300393","view_mode":"medstat_image_centered","fields":{"format":"medstat_image_centered","field_file_image_alt_text[und][0][value]":"Dead, polluted side/Green clear sky side","field_file_image_credit[und][0][value]":"angkhan/Getty Images","field_file_image_caption[und][0][value]":""},"type":"media","attributes":{"class":"media-element file-medstat_image_centered"}}]]The impact of climatic hazards on AD appears to vary depending on the geographic region and its baseline climate, the authors said. <span class="Hyperlink"><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3787533/">A study</a></span> in South Korea, for instance, found that in areas declared as disaster zones after storms and heavy rains, the number of AD-related outpatient visits increased for all ages. And a <span class="Hyperlink"><a href="https://www.jidonline.org/article/S0022-202X(15)36320-X/fulltext">study in the United States</a></span> showed an increased prevalence of childhood eczema in states with higher mean annual precipitation. However, some other studies on precipitation found no associations. <br/><br/>Just as published studies on precipitation yielded mixed results, so have studies on warming temperatures, Dr. Abuabara and her colleagues reported in their paper, with higher temperatures found to be positively associated with severity of AD symptoms <span class="Hyperlink"><a href="https://onlinelibrary.wiley.com/doi/10.1111/pai.13314">in a study</a></span> among patients with AD living in a region of Southern Italy, but decreased AD-related health care utilization in a <span class="Hyperlink"><a href="https://onlinelibrary.wiley.com/doi/10.1111/jdv.15023">study in Denmark</a></span>.<br/><br/>In another <span class="Hyperlink"><a href="https://www.jidonline.org/article/S0022-202X(15)36449-6/fulltext">study of over 5,500 children</a></span> enrolled in an eczema registry in the United States between 2004 and 2012, higher temperature (odds ratio [OR] = 0.90, <em>P</em> < .001) and increased sun exposure (OR = 0.93, <em>P </em>= .009) were associated with poorly controlled eczema, after the researchers controlled for gender, race, income, and topical medication use.</p> <h2><br/><br/>Studies From 10 Countries Reviewed</h2> <p>Across the 18 studies identified in the review, data were collected in 10 countries. Five studies were conducted in the United States, one used global data, six were from Asia, and the others were from Europe and Africa. Data are lacking, the researchers wrote, in many parts of the world, including coastal regions of the tropics that are projected to experience the largest cumulative climatic hazards. <br/><br/>Future research should not only cover more geographic areas — especially those most impacted by climate change — but should examine impacts on AD incidence, prevalence, and “long-term monitoring of disease activity over time at the individual level,” the researchers recommended. Research should also aim to integrate multiple climatic factors and types of climate data, they said.<br/><br/>“As researchers, we always like to distill things down, but with climatic hazards like warming, you have to integrate other factors such as what the baseline temperature is and how precipitation is involved,” Dr. Abuabara said in the interview. With precipitation, similarly, associated factors such as outdoor humidity, pollen, and pollution exposure may also be at play for AD. Overall, she said, “you have to integrate many types of data.” <br/><br/>In addition to their literature review, the researchers created maps comparing the past, present, and future burden of climatic hazards to AD prevalence data. One pair of maps illustrates global cumulative exposure to climatic hazards in 2005 in parallel with the estimated annual change in AD prevalence in the subsequent decade. “It’s meant to be descriptive,” Dr. Abuabara said in the interview. The maps show alignment “between the areas experiencing the most climatic hazards and those where we subsequently saw the most rapid changes in AD.”<br/><br/>The paper also describes how climatic factors impact skin physiology and AD — exacerbating barrier impairment, immune dysregulation, dysbiosis, and pruritus — and how there are differential impacts on vulnerable and displaced populations with AD. It also briefly addresses air pollution, which was not included in the review framework but is impacted by wildfire and other included climatic factors. <br/><br/></p> <h2>The Need to Better Track AD, Anticipate Clinical Impact</h2> <p>“Outside of epidemiology, [clinicians and others] may not realize we actually have fairly poor measures of prevalence and severity of AD and disease flare over time,” Dr. Abuabara said. So “improving the ways we can measure this disease and getting more detailed data is important” for assessing the impact of climate changes.<br/><br/>More skin measures should be incorporated into large national health surveys, for one. “Skin doesn’t come to mind as much as diseases like heart disease and diabetes,” she said, and when surveys ask about AD, “they often don’t ask specific enough questions or ask about severity.” The clinical impacts of adverse climatic changes and extreme weather events — sudden therapy interruption, particularly of systemic agents, and delayed treatment, for instance — should be reflected in the planning and provision of dermatology services, Dr. Abuabara and her coauthors wrote. <br/><br/>There are currently no evidence-based recommendations for what patients with AD can do differently when faced with wildfire smoke or other climatic hazards, other than general recommendations, for instance, to reduce exposure to wildfire smoke and aeroallergens, she said in the interview. But “overall, the field has moved to more proactive treatment patterns ... toward providing anticipatory guidance and having individualized treatment plans that give people the tools to be ready to step things up or counteract [flares or worsening] if they need to.”<br/><br/>She and her San Francisco–based coauthors have already experienced the impact of wildfires firsthand. “It was amazing — in the period right after a major wildfire hundreds of miles away from the Bay area, we saw a huge spike in visits for itch and for eczema,” she said, referring to <span class="Hyperlink"><a href="https://jamanetwork.com/journals/jamadermatology/fullarticle/2778632">research on AD clinic visits</a></span> after the 2018 California Camp Fire. “It showed up dramatically in the data,” said Dr. Abuabara, one of the authors of that study.<br/><br/>The new review adds to a growing body of literature documenting health impacts of climate change and advocating for action. In September 2021, more than 230 medical journals, including the <em>New England Journal of Medicine</em> — though not any dermatology journals — <span class="Hyperlink"><a href="https://www.nejm.org/doi/10.1056/NEJMe2113200">published an editorial</a></span> calling for emergency action to limit global warming and protect health.<br/><br/>The following year, a <span class="Hyperlink"><a href="https://onlinelibrary.wiley.com/doi/10.1111/jdv.18416">commentary</a></span> published across four dermatology journals <span class="Hyperlink"><a href="https://www.mdedge.com/dermatology/article/258659/business-medicine/climate-change-commentary-four-dermatology-journals">discussed</a></span> current and future impacts of climate change and urged dermatologists to become more engaged in finding solutions to help mitigate and adapt to climate change.<br/><br/>More recently, dermatologists have published about the environmental impact of professional practices such as <span class="Hyperlink"><a href="https://www.jaad.org/article/S0190-9622(23)03207-3/abstract">print journals</a></span> and meeting <span class="Hyperlink"><a href="https://www.jaad.org/article/S0190-9622(23)01167-2/fulltext">samples</a></span> using single-use plastics. <br/><br/>Dr. Abuabara disclosed to <em>Allergy</em> that she is a consultant for TARGET RWE and Amgen and that her institution receives grants for research from Pfizer and LaRoche Posay. Dr. Eichenfield reported serving as a scientific adviser, consultant, and/or study investigator for Pfizer, AbbVie, Amgen and other companies. Dr. Wang disclosed that she is an International Eczema Council Fellow with financial support from Abbvie. Other authors had multiple disclosures.</p> </itemContent> </newsItem> <newsItem> <itemMeta> <itemRole>teaser</itemRole> <itemClass>text</itemClass> <title/> <deck/> </itemMeta> <itemContent> </itemContent> </newsItem> </itemSet></root>
FROM ALLERGY
