Abstract
Aim: Although multiple studies have linked short-term exposure to particulate matter (PM10) with respiratory symptoms and lung function (LF) in children, little is known about effects of early lifetime exposure.
Methods: In a population-based cohort study (n=4400) we collected information on residential history from birth to early school-age (6-9 yrs) and modelled primary PM10 exposure throughout childhood using Airviro. We assessed wheeze symptoms by parental questionnaires and performed spirometry in a sample of children aged 9-13 yrs (n=399). We analysed association between early life exposure to PM10 and LF using linear regressions controlling for a number of confounders and attacks of wheeze at school-age.
Results: Median (interquartile range) of early life exposure to PM10 was 1.83 (0.93-2.70) μg/m3. Mean (SD) FVC, FEV1 and MEF50 were 2.42 (0.44) l, 2.11 (0.39) l and 2.82 (0.73) l/s respectively. After adjustment FVC was lower with higher exposures to PM10.We found no significant association with FEV1 or MEF50. When adjusting for number of attacks results were similar.
Conclusions: Lifetime exposure to primary PM10 was associated with lower FVC at school-age which might be independent of wheezing disorders. This result is compatible with a chronic effect of air pollution on normal lung function growth, resulting in a restrictive rather than an obstructive pattern.
Funding: SNF 3200B0-122341, Asthma UK 07/048
- © 2011 ERS