Atmospheric environment and persistence of pediatric asthma: A population-based cohort study

Hwan Soo Kim1, Kyunghoon Kim2, Eun Hee Rhee3,4

  • 1Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea.

Insights

Childhood asthma often resolves, but some children experience persistent symptoms into adulthood. Factors like younger age at enrollment, male sex, air pollution exposure, and food allergies increase the risk of asthma persistence.

Area of Science:

  • Pediatric Allergy and Immunology
  • Environmental Health
  • Epidemiology

Background:

  • Asthma in children is heterogeneous, with a significant portion experiencing symptom resolution by adulthood.
  • However, data linking childhood asthma trajectories to adult outcomes remain limited.

Purpose of the Study:

  • To identify factors associated with the persistence of childhood asthma over a three-year follow-up period.
  • To link data from the Korea Childhood Asthma Study (KAS) with national health insurance claims (HIRA) for comprehensive analysis.

Main Methods:

  • Analysis of 450 preadolescent children (aged 7-10) categorized into asthma remission or persistence groups.
  • Comparison of baseline clinical characteristics and exposure to air pollutants (PM2.5, PM10).
  • Asthma persistence defined by healthcare utilization and medication prescriptions within three years post-enrollment.

Main Results:

  • Lower enrollment age, male sex, proximity to air-polluting facilities, higher PM2.5 levels, and diagnosed food allergy were significant risk factors for asthma persistence.
  • Specific adjusted odds ratios (aOR) and confidence intervals (CI) were reported for each factor.

Conclusions:

  • Several independent risk factors for persistent childhood asthma were identified.
  • Linking KAS and HIRA data enabled clarification of these risk factors in a defined population.
Abstract

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