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G170 POPULATION ATTRIBUTABLE RISK FOR ADVERSE BIRTH OUTCOMES DUE TO MATERNAL SMOKING DURING PREGNANCY
A. Delpisheh¹, Y. Kelly², S. Rizwan¹, E. Attia¹, B. Brabin¹.¹The University of Liverpool, Liverpool, UK; ²The University College, London, UK

Objective: To estimate the population proportion of low birthweight, preterm births, and fetal growth restriction, which can be prevented with smoking avoidance during pregnancy.

Methods: An analysis of community and hospital based cross sectional studies undertaken in Merseyside covering the period 1983–2003.

Results: Maternal smoking status and pregnancy outcomes were available for a sample of 12 771 women. The proportion of women smoking during pregnancy has decreased from 37% in 1983 to 28.8% in 2003 (p<0.001). Smoking during pregnancy was a highly significant risk factor for both low birthweight (RR 2.1; 95% CI 1.9 to 2.4) and preterm birth (RR 1.5; 95% CI 1.3 to 1.7). The population attributable risk (PAR) for low birthweight due to maternal smoking ranged from 12.9% (95% CI 12.1 . . . [Full text of this article]