Long-term PM Exposure is Associated with Asthma Prevalence and Exhaled Nitric Oxide Levels in Children

Overview

Journal Pediatr Res

Specialties Biology
Pediatrics

Date 2024 Jan 24

PMID 38263452

Authors

Yi-Giien Tsai

Chia-Pin Chio

Kuender D Yang

Ching-Hsiung Lin

Yen-Po Yeh

Yu-Jun Chang

Jien-Wen Chien

Shu-Li Wang

Shau-Ku Huang

Chang-Chuan Chan

Affiliations

Soon will be listed here.

Abstract

Background: Exhaled nitric oxide concentration (FENO) is a marker of airway inflammation. This study aimed to evaluate the association of air pollution exposure with FENO levels and asthma prevalence with respiratory symptoms in school children.

Methods: We analyzed 4736 school children who reside in six townships near industrial areas in central Taiwan. We evaluated asthmatic symptoms, FENO, and conducted the environmental questionnaire. The personal exposure of PM, NO, and SO was estimated using land-use regression models data on children's school and home addresses.

Results: Annual exposure to PM was associated with increased odds of physician-diagnosed asthma (OR = 1.595), exercise-induced wheezing (OR = 1.726), itchy eyes (OR = 1.417), and current nasal problems (OR = 1.334) (P < 0.05). FENO levels in the absence of infection were positively correlated with age, previous wheezing, allergic rhinitis, atopic eczema, near the road, and for children with high exposure to PM (P < 0.05). An increase of 1 μg/m PM exposure was significantly associated with a 1.0% increase in FENO levels for children after adjusting for potential confounding variables, including exposures to NO and SO.

Conclusions: Long-term exposures to PM posed a significant risk of asthma prevalence and airway inflammation in a community-based population of children.

Impact: Annual exposure to PM was associated with increased odds of physician-diagnosed asthma and nasal problems and itchy eyes. Long-term exposures to PM2.5 were significantly associated with FENO levels after adjusting for potential confounding variables. This is first study to assess the association between FENO levels and long-term air pollution exposures in children near coal-based power plants. An increase of 1 μg/m annual PM exposure was significantly associated with a 1.0% increase in FENO levels. Long-term exposures to PM2.5 posed a significant risk of asthma prevalence and airway inflammation in a community-based population of children.

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