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Maternal smoking and cannabis use during pregnancy and infant outcomes: Smoking/cannabis in pregnancy and infant outcome

Research output: Contribution to journalArticle

Sarah Sturrock, Emma Williams, Hemant Ambulkar, Theodore Dassios, Anne Greenough

Original languageEnglish
JournalJournal of Perinatal Medicine
Accepted/In press3 Dec 2019

King's Authors

Abstract

Background: Our aim was to determine the prevalence of tobacco smoking and e-cigarettes and cannabis use during pregnancy, whether these were influenced by ethnicity and their relationship to perinatal outcomesMethods: A study was carried out of 4,465 infants whose mothers delivered during 2017 and 2018. Self-reported maternal smoking, e-cigarette and cannabis use at booking were recorded. Outcome measures were birthweight and head circumference z-scores and admission to neonatal intensive care unit. Results: Two hundred and five women reported smoking cigarettes (4.7%), five were using e-cigarettes (0.11%) and 106 were using cannabis (2.43%). Women were most likely to smoke if young (15-19 years old) or from a mixed-race or white background. Cigarette smoking was associated with a lower mean z-score for birthweight (-0.587 versus -0.064) and head circumference (-0.782 versus -0.157) (both outcomes p<0.0001). Young, mixed-race women were most likely to be both smoking and using cannabis during pregnancy and their infants had a lower birthweight mean z score (-0.989 versus-0.587, p=0.028) and head circumference z score (-1.33 versus 0.782, p=0.025) than cigarette use alone.Conclusion: Young, mixed-race women were most likely to be both smoking and using cannabis during pregnancy and should be targeted for cessation programmes.

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