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Maternal exposure to ambient air pollutants and risk of congenital anomalies

Lookup NU author(s): Professor Judith Rankin, Dr Thomas Chadwick, Denise Howel, Professor Mark Pearce, Professor Tanja Pless-Mulloli

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Abstract

Studies have suggested an association between maternal exposure to ambient air pollution and risk of congenital anomaly. The aim of this study is to investigate the association between exposure to black smoke (BS; particulate matter with aerodynamic diameter <4 mu g/m(3)) and sulphur dioxide (SO2) during the first trimester of pregnancy and risk of congenital anomalies. We used a case-control study design among deliveries to mothers resident in the UK Northern health region during 1985-1990. Case data were ascertained from the population-based Northern Congenital Abnormality Survey and control data from national data on all births. Data on BS and SO2 from ambient air monitoring stations were used to average the total pollutant exposure during the first trimester of pregnancy over the daily readings from all monitors within 10km of the mother's residence. Logistic regression models estimated the association via odds ratios. A significant but weak positive association was found between nervous system anomalies and BS (OR = 1.10 per increase of 1000 mu g/m(3) total BS; 95% Cl: 1.03, 1.18), but not with other anomaly subtypes. For SO2, a significant negative association was found with congenital heart disease combined and patent ductus arteriosus: OR significantly <1 for all quartiles relative to the first quartile. The relationship between SO2 levels and other anomaly subtypes was less clear cut: there were either no significant associations or a suggestion of a U-shaped relationship (OR significantly <1 for moderate compared to lowest levels, but not with high SO2 levels). Overall, maternal exposure to BS and SO2 in the Northern region had limited impact on congenital anomaly risk. Studies with detailed exposure assessment are needed to further investigate this relationship. (C) 2008 Elsevier Inc. All rights reserved.


Publication metadata

Author(s): Rankin JM, Chadwick TJ, Natarajan M, Howel DM, Pearce MS, Pless-Mulloli T

Publication type: Article

Publication status: Published

Journal: Environmental Research

Year: 2009

Volume: 109

Issue: 2

Pages: 181-187

ISSN (print): 0013-9351

ISSN (electronic): 1096-0953

Publisher: Academic Press

URL: http://dx.doi.org/10.1016/j.envres.2008.11.007

DOI: 10.1016/j.envres.2008.11.007


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