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Exposure to moderate air pollution and associations with lung function at school-age: A birth cohort study

Usemann, Jakob and Decrue, Fabienne and Korten, Insa and Proietti, Elena and Gorlanova, Olga and Vienneau, Danielle and Fuchs, Oliver and Latzin, Philipp and Röösli, Martin and Frey, Urs and Bild study group, . (2019) Exposure to moderate air pollution and associations with lung function at school-age: A birth cohort study. Environment International, 126. pp. 682-689.

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Abstract

Adverse effects of higher air pollution levels before and after birth on subsequent lung function are often reported in the literature. We assessed whether low-to-moderate levels of air pollution during preschool-age impact upon lung function at school-age.; In a prospective birth cohort of 304 healthy term-born infants, 232 (79%) completed lung function at follow-up at six years. Using spatial-temporal models, levels of individual air pollution (nitrogen dioxide (NO; 2; ) and ozone (O; 3; ), particulate matter with a diameter <10 μm (PM; 10; )) were estimated for the time windows pregnancy, first up to the sixth year of life separately, and birth until follow-up at six years. Time window means were compared to World Health Organization (WHO) guideline limits. Associations of exposure windows with spirometry and body plethysmography indices were analyzed using regression models, adjusting for potential confounders. For subgroup analysis, air pollution exposure was categorized into quartiles (four groups of 52 children).; Mean NO; 2; level from birth until follow-up was [mean (range)] [11.8 (4.9 to 35.9 μg/m; 3; )], which is almost 4-times lower than the WHO suggested limit of 40 μg/m; 3; . In the whole population, increased air pollution levels from birth until follow-up were associated with reduced lung function at six years. In the subgroup analysis, the 52 children exposed to NO; 2; levels from the highest quartile during pregnancy, the first and second years of life and from birth until follow-up, had a significant decrease in forced expiratory volume in 1 s (FEV; 1; ). Per interquartile range increase of NO; 2; , FEV; 1; decreased by [z-score change (95% confidence interval)] [-1.07 (-1.67 to -0.47)], [-1.02 (-1.66 to -0.39)], [-0.51 (-0.86 to -0.17)] and [-0.80 (-1.33 to -0.27)], respectively. Air pollution exposure during pregnancy and childhood resulted in a non-significant decrease in lung volume at six years, as assessed by functional residual capacity measured by body plethysmography (FRC; pleth; ).; Our results suggest that exposure to higher NO; 2; levels, which are still much lower than WHO guideline limits, especially during the sensitive period of early lung development, may be associated with reduced lung function at school-age. These findings support the concept of age and dose-dependent pollution effects on lung function in healthy school-aged children and underline the importance of pollution reduction measures.
Faculties and Departments:03 Faculty of Medicine > Bereich Kinder- und Jugendheilkunde (Klinik) > Kinder- und Jugendheilkunde (UKBB) > Pädiatrie (Frey)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Kinder- und Jugendheilkunde (Klinik) > Kinder- und Jugendheilkunde (UKBB) > Pädiatrie (Frey)
09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Epidemiology and Public Health (EPH) > Environmental Exposures and Health > Physical Hazards and Health (Röösli)
09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Medicine (MED)
UniBasel Contributors:Vienneau, Danielle and Röösli, Martin and Frey, Urs Peter and Decrue, Fabienne and Gorlanova, Olga and Usemann, Jakob
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0160-4120
e-ISSN:1873-6750
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
edoc DOI:
Last Modified:12 Apr 2021 09:03
Deposited On:15 Mar 2019 07:29

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