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Environ Health Perspect. 2013 Oct;121(10):1232-8. doi: 10.1289/ehp.1205961. Epub 2013 Jun 18.

Long-term exposure to PM10 and NO2 in association with lung volume and airway resistance in the MAAS birth cohort.

Author information

1
Centre for Occupational and Environmental Health, Health Sciences Group, School of Community-Based Medicine, Manchester Academic Health Sciences Centre, The University of Manchester, Manchester, United Kingdom.

Abstract

BACKGROUND:

Findings from previous studies on the effects of air pollution exposure on lung function during childhood have been inconsistent. A common limitation has been the quality of exposure data used, and few studies have modeled exposure longitudinally throughout early life.

OBJECTIVES:

We sought to study the long-term effects of exposure to particulate matter with an aerodynamic diameter ≤ 10 μm (PM10) and to nitrogen dioxide (NO2) on specific airway resistance (sR(aw)) and forced expiratory volume in 1 sec (FEV1) before and after bronchodilator treatment. Subjects were from the Manchester Asthma and Allergy Study (MAAS) birth cohort (n = 1,185).

METHODS:

Spirometry was performed during clinic visits at ages 3, 5, 8, and 11 years. Individual-level PM10 and NO2 exposures were estimated from birth to 11 years of age through a microenvironmental exposure model. Longitudinal and cross-sectional associations were estimated using generalized estimating equations and multivariable linear regression models.

RESULTS:

Lifetime exposure to PM10 and NO2 was associated with significantly less growth in FEV1 (percent predicted) over time, both before (-1.37%; 95% CI: -2.52, -0.23 for a 1-unit increase in PM10 and -0.83%; 95% CI: -1.39, -0.28 for a 1-unit increase in NO2) and after bronchodilator treatment (-3.59%; 95% CI: -5.36, -1.83 and -1.20%; 95% CI: -1.97, -0.43, respectively). We found no association between lifetime exposure and sR(aw) over time. Cross-sectional analyses of detailed exposure estimates for the summer and winter before 11 years of age and lung function at 11 years indicated no significant associations.

CONCLUSIONS:

Long-term PM10 and NO2 exposures were associated with small but statistically significant reductions in lung volume growth in children of elementary-school age.

PMID:
23777813
PMCID:
PMC3801452
DOI:
10.1289/ehp.1205961
[Indexed for MEDLINE]
Free PMC Article

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