Eczema is on the rise globally. At the same time, industrialization has increased, which has resulted in increases in air pollution (industrial practices generate air pollution). A recent study found an association of air pollution and eczema - the more air pollution rises, the greater the incidence of eczema.
Researchers specifically looked at fine particulate matter of diameter ≤ 2.5μm (PM2.5) throughout the US. They found that individuals with eczema (12,695 persons) lived in areas with significantly higher PM2.5 concentrations than did persons without eczema (274,127 persons). And that the odds of having eczema increased as the fine particulate matter in the air increased.
The researchers point out that several other studies done in different parts of the globe had similar findings.
From Medical Xpress: Air pollution exposure may be associated with eczema, study finds
People living in areas with higher levels of air pollution are more likely to have eczema, according to a new study published November 13, 2024 in the open-access journal PLOS ONE by Dr. Jeffrey Cohen of Yale School of Medicine, U.S.
The prevalence of eczema has increased globally with industrialization, suggesting a possible contribution from environmental factors. In the new study, researchers used data from the U.S. National Institutes of Health "All of Us" Research Program, covering hundreds of thousands of U.S. adults. The current study included 286,862 people for whom there was available demographic, zip code and electronic health record data.
Overall, 12,695 participants (4.4%) were diagnosed with eczema. After controlling for demographics and smoking status, people with eczema were more likely to live in zip codes with high levels of fine particulate matter, or PM2.5, in the air. For every increase of 10 µm/m3 in average PM2.5 air pollution in their zip code, people were more than twice as likely to have eczema.
The authors conclude that increased air pollution, as measured by PM2.5, may influence the risk of developing eczema, likely through its effects on the immune system.
The authors add, "Showing that individuals in the United States who are exposed to particulate matter are more likely to have eczema deepens our understanding of the important health implications of ambient air pollution."