%0 Journal Article %A Anthony A Laverty %A Thomas Hone %A Eszter P Vamos %A Philip E Anyanwu %A David Taylor-Robinson %A Frank de Vocht %A Christopher Millett %A Nicholas S Hopkinson %T Impact of banning smoking in cars with children on exposure to second-hand smoke: a natural experiment in England and Scotland %D 2020 %R 10.1136/thoraxjnl-2019-213998 %J Thorax %P thoraxjnl-2019-213998 %X England banned smoking in cars carrying children in 2015 and Scotland in 2016. We used survey data from 3 years for both countries (NEngland=3483–6920, NScotland=232–319) to assess effects of the English ban using logistic regression within a difference-in-differences framework. Among children aged 13–15 years, self-reported levels of regular exposure to smoke in cars for Scotland were 3.4% in 2012, 2.2% in 2014 and 1.3% in 2016 and for England 6.3%, 5.9% and 1.6%. The ban in England was associated with a −4.1% (95% CI −4.9% to −3.3%) absolute reduction (72% relative reduction) in exposure to tobacco smoke among children. %U https://thorax.bmj.com/content/thoraxjnl/early/2020/01/08/thoraxjnl-2019-213998.full.pdf