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Longitudinal Cohort Survey of Women's Smoking Behaviour and Attitudes in Pregnancy: Study Methods and Baseline Data

Overview
Journal BMJ Open
Specialty General Medicine
Date 2014 May 17
PMID 24833689
Citations 19
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Abstract

Objectives: To report the methods used to assemble a contemporary pregnancy cohort for investigating influences on smoking behaviour before, during and after pregnancy and to report characteristics of women recruited.

Design: Longitudinal cohort survey.

Setting: Two maternity hospitals, Nottingham, England.

Participants: 3265 women who attended antenatal ultrasound scan clinics were offered cohort enrolment; those who were 8-26 weeks pregnant and were currently smoking or had recently stopped smoking were eligible. Cohort enrollment took place between August 2011 and August 2012.

Primary And Secondary Outcome Measures: Prevalence of smoking at cohort entry and at two follow-up time points (34-36 weeks gestation and 3 months postnatally); response rate, participants' sociodemographic characteristics.

Results: 1101 (33.7%, 95% CI 32.1% to 35.4%) women were eligible for inclusion in the cohort, and of these 850 (77.2%, 95% CI 74.6% to 79.6%) were recruited. Within the cohort, 57.4% (N=488, 95% CI 54.1% to 60.7%) reported to be current smokers. Current smokers were significantly younger than ex-smokers (p<0.05), more likely to have no formal qualifications and to not be in current paid employment compared to recent ex-smokers (p<0.001).

Conclusions: This contemporary cohort, which seeks very detailed information on smoking in pregnancy and its determinants, includes women with comparable sociodemographic characteristics to those in other UK cross-sectional studies and cohorts. This suggests that future analyses using this cohort and aimed at understanding smoking behaviour in pregnancy may produce findings that are broadly generalisable.

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Bowker K, Lewis S, Ussher M, Naughton F, Phillips L, Coleman T Addict Behav. 2021; 123:107050.

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