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    Particulate air pollution, fetal growth and gestational length: The influence of residential mobility in pregnancy.

    238901 full.pdf (848.9Kb)
    Access Status
    Open access
    Authors
    Pereira, Gavin
    Bracken, M.
    Bell, M.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Pereira, G. and Bracken, M. and Bell, M. 2016. Particulate air pollution, fetal growth and gestational length: The influence of residential mobility in pregnancy. Environmental Research. 147: pp. 269-274.
    Source Title
    Environ Res
    DOI
    10.1016/j.envres.2016.02.001
    URI
    http://hdl.handle.net/20.500.11937/13346
    Collection
    • Curtin Research Publications
    Abstract

    BACKGROUND: It remains unclear as to whether neglecting residential mobility during pregnancy introduces bias in studies investigating air pollution and adverse perinatal outcomes, as most studies assess exposure based on residence at birth. The aim of this study was to ascertain whether such bias can be observed in a study on the effects of PM10 on risk of preterm birth and fetal growth restriction. METHODS: This was a retrospective study using four pregnancy cohorts of women recruited in Connecticut, USA (N=10,025). We ascertained associations with PM10 exposure calculated using first recorded maternal address, last recorded address, and full address histories. We used a discrete time-to-event model for preterm birth, and logistic regression to investigate associations with small for gestational age (SGA) and term low birth weight (LBW). RESULTS: Pregnant women tended to move to areas with lower levels of PM10. For all outcomes, there was negligible difference between effect sizes corresponding to exposures calculated with first, last and full address histories. For LBW, associations were observed for exposure in second trimester (OR 1.09; 95% CI: 1.04-1.14 per 1µg/m(3) PM10) and whole pregnancy (OR 1.08; 95% CI: 1.02-1.14). For SGA, associations were observed for elevated exposure in second trimester (OR 1.02; 95% CI: 1.00-1.04) and whole pregnancy (OR 1.03; 95% CI: 1.01-1.05). There was insufficient evidence for association with preterm birth. CONCLUSION: PM10 was associated with both SGA and term LBW. However, there was negligible benefit in accounting for residential mobility in pregnancy in this study.

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