Estimating vulnerable windows of exposure to air pollution during pregnancy

Barnett, Adrian G. & Wolkewitz, Martin (2012) Estimating vulnerable windows of exposure to air pollution during pregnancy. [Working Paper] (Unpublished)

Abstract

Exposure to air pollution during pregnancy is a potential cause of adverse birth outcomes such as preterm birth and stillbirth. The risk of exposure may be greater during vulnerable windows of the pregnancy which might only be weeks long. We demonstrate a method to find these windows based on smoothing the risk of weekly exposure using conditional autoregression. We use incidence density sampling to match cases with adverse birth outcomes to controls whose gestation lasted at least as long as the case. This matching means that cases and controls are have equal length exposure periods, rather than comparing, for example, cases with short gestations to controls with longer gestations. We demonstrate the ability of the method to find vulnerable windows using two simulation studies. We illustrate the method by examining the association between particulate matter air pollution and stillbirth in Brisbane, Australia.

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ID Code: 56403
Item Type: Working Paper
Refereed: No
Keywords: survival analysis, environmental epidemiology, case-control, pregnancy, air pollution
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700) > Epidemiology (111706)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Public Health & Social Work
Deposited On: 14 Jan 2013 23:06
Last Modified: 15 Jan 2013 16:12

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