AI Article Synopsis

  • Air pollutants may worsen atopic dermatitis (AD), but the link between Air Quality Index (AQI) and AD incidence was unclear until this study.
  • Researchers analyzed data from over 21 million people in Taiwan, finding that higher AQI levels correlated with an increased risk of developing AD.
  • The study showed a clear dose-response relationship: as AQI worsened, the risk of AD rose significantly, suggesting that even small increments in AQI can elevate the chance of developing the condition.

Article Abstract

Background: Air pollutants may aggravate atopic dermatitis (AD). However, the association between Air Quality Index (AQI) and incidence of AD remains unknown.

Objective: To investigate association between AQI and incidence of AD, using the nationwide cohort in the Taiwan National Health Insurance Research Database (NHIRD).

Methods: We included 21,278,938 participants from the NHIRD not diagnosed with AD before 2008. Long-term average AQI value, obtained from the Taiwan Air Quality Monitoring System Network, before AD diagnosis was calculated and linked for each participant.

Results: 199,205 incident cases of AD were identified from 2008 to 2018. Participants were classified into 4 quantiles (Q) by AQI value. With the lowest quantile, Q1, as reference, the AD risk increased significantly in the Q2 group (adjusted hazard ratio [aHR]: 1.29, 95% confidence interval [CI]: 1.04-1.65), Q3 group (aHR: 4.71, 95% CI: 3.78-6.04), and was highest in the Q4 group (aHR: 13.20, 95% CI: 10.86-16.60). As AQI treated as a continuous variable, an increase of 1 unit of AQI value added 7% of AD risk (aHR, 1.07, 95% CI: 1.07-1.08).

Limitations: The NHIRD lacks detailed information on individual subjects.

Conclusions: The results demonstrated a significant positive association between AQI and incidence of AD with a clear dose-response relationship.

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http://dx.doi.org/10.1016/j.jaad.2024.01.058DOI Listing

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