Dr. Susan Hodgson, Imperial College London: smoke-free legislation impact on birth outcomes in England published in Epidemiology

Dr. Susan Hodgson, Lecturer in Environmental Epidemiology & Exposure at Imperial College London, has a paper published in Epidemiology November 2016.


The work assessing the impact of smoke-free legislation on birth outcomes in England, which started as a student project (Ruth Kelly’s MPH dissertation, submitted Sept 2013), has been published in the November issue of the journal Epidemiology. Ioannis Bakolis (now at King’s) led the statistical analysis, which used a regression discontinuity design - a quasi-experimental approach - to facilitate causal inference. The study team, including researchers at EBS and PCPH, analysed data on 1.8 million pregnancies and found that in the 1 to 5 months following the introduction of the smoke-free legislation, for those entering their third trimester, the risk of low birth weight decreased by 8%-14%, very low birth weight by 28%-32%, preterm birth by 4%-9%, and small for gestational age by 5%-9%. We concluded that the introduction of smoke-free legislation in England had an immediate beneficial impact on birth outcomes overall, although this impact varied by maternal age, deprivation, ethnicity, and region.

A video abstract is available at http://links.lww.com/EDE/B85

Bakolis I, Kelly R, Fecht D, Best N, Millett C, Garwood K, Elliott P, Hansell AL, Hodgson S. Protective effects of smoke-free legislation on birth outcomes in England; a regression discontinuity design. Epidemiology 2016;27(6):810-818

To read the abstract, please follow the link:

Protective Effects of Smoke-free Legislation on Birth Outcomes in England: A Regression Discontinuity Design