Impact of Scotland's smoke-free legislation on pregnancy complications: retrospective cohort study.

PLoS Med · 2012 · PMC3295815 · PMID 22412353

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did not reach statistical significanceno p-value reported

Following the Italian smoke-free legislation, smoking prevalence among pregnant women decreased at conception and during the first trimester, but this decrease did not reach statistical significance [23] , and following the Irish legislation, smoking prevalence for pregnant women decreased by 12% [24] .

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