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 to 13.9) in 1983 to a peak of 40.9% (95% CI 40.5 to 41.3) in 1999 (mean 28.1%). For preterm birth, the PAR ranged from a low of 10% (95% CI 9.7 to 10.4) in 1983 to a peak of 25.7 % (95% CI 25.5 to 26.0) in 1999 (mean 15.1%). For fetal growth restriction, the minimum was 4.2% (95% CI 4.0 to 4.4) in 1988 to maximum of 56.6% (95% CI 56.1 to 57.1) 10 years later in 1998 (mean 22.0%).

Conclusions: Approximately 28.1% of low birthweight babies, 15.1% of preterm births, and 22.0% of cases of fetal growth restriction in Merseyside could be prevented if the risk of maternal smoking during pregnancy was removed.

G171 PAEDIATRIC TRAINING SCHEME WEBSITES

C. Dunkley¹, M. Hesseling².¹Great Ormond Street Hospital, London, UK; ²Alder Hey Hospital, Liverpool, UK

Introduction: A survey was conducted in …