Different Impacts of Traffic-Related Air Pollution on Early-Onset and Late-Onset Asthma

Ting Yu Lin, Firdian Makrufardi, Nguyen Thanh Tung, Amja Manullang, Po Jui Chang, Chun Yu Lo, Tzu Hsuan Chiu, Pi Hung Tung, Chiung Hung Lin, Horng-Chyuan Lin, Chun Hua Wang, Shu-min Lin*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

Abstract

BACKGROUND: Early-onset asthma (EOA) and late-onset asthma (LOA) are two distinct phenotypes. Air pollution has been associated with an increase in poorer asthma outcomes. The objective of this study was to examine the effects of traffic-related air pollution (TRAP) on asthma outcomes in EOA and LOA patients.

METHODS: A cross-sectional study was conducted on 675 asthma patients (LOA: 415) recruited from a major medical center in Taiwan. The land-use regression (LUR) model was used to estimate the level of exposure to PM 10, PM 2.5, NO 2, and O 3 on an individual level. We investigated the association between TRAP and asthma outcomes in EOA and LOA patients, stratified by allergic sensitization status, using a regression approach.

RESULTS: An increase in PM 10 was associated with younger age of onset, increased asthma duration, and decreased lung function in EOA patients ( p<0.05). An increase in PM 10 was associated with older age of onset, and decreased asthma duration, eosinophil count, and Asthma Control Test (ACT) score in LOA patients. An increase in PM 2.5 was associated with younger age of onset, increased asthma duration, decreased eosinophil count, and lung function in EOA patients ( p<0.05). An increase in PM 2.5 was associated with decreased lung function and ACT score in LOA patients. An increase in NO 2 was associated with increased eosinophil count and decreased lung function in EOA patients ( p<0.05). An increase in O 3 was associated with decreased lung function in LOA patients ( p<0.05). In addition, associations of TRAP with age of onset and eosinophil counts were mainly observed in both EOA and LOA patients with allergic sensitization, and an association with ACT was mainly observed in LOA patients without allergic sensitization.

CONCLUSION: The impact of TRAP on age of onset, eosinophil count, and lung function in EOA patients, and ACT in LOA patients, was affected by the status of allergic sensitization.

Original languageEnglish
Pages (from-to)195-208
Number of pages14
JournalJournal of Asthma and Allergy
Volume17
DOIs
StatePublished - 2024

Bibliographical note

© 2024 Lin et al.

Keywords

  • air pollution
  • allergy
  • early-onset asthma
  • late-onset asthma
  • respiratory disease

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