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Partner smoking influences whether mothers quit smoking during pregnancy: a prospective cohort study
Author(s) -
RománGálvez RM,
AmezcuaPrieto C,
OlmedoRequena R,
LewisMikhael Saad AM,
MartínezGaliano JM,
BuenoCavanillas A
Publication year - 2018
Publication title -
bjog: an international journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.157
H-Index - 164
eISSN - 1471-0528
pISSN - 1470-0328
DOI - 10.1111/1471-0528.14986
Subject(s) - medicine , pregnancy , prospective cohort study , obstetrics , cohort study , cohort , confidence interval , demography , anthropometry , smoking cessation , first trimester , second trimester , gynecology , gestation , genetics , pathology , sociology , biology
Objective To analyse the prevalence and intensity of smoking among pregnant women and their partners, and factors associated with quitting smoking among pregnant women. Design A prospective cohort study, starting in 2013. Setting Andalusia, the south of Spain. Sample A cohort of 486 healthy pregnant women followed‐up on three occasions during pregnancy. Methods Estimation of the proportions of women and partners who quit smoking at each trimester. Main outcome measures To determine factors associated in a multivariable model, considering sociodemographic, obstetric, anthropometric, lifestyle variables, and the smoking habits of their partners. Results A high proportion of women quit smoking during pregnancy (61.08%; 95% confidence interval, 95% CI 53.61–68.55%). The smoking rate amongst mothers decreased from 36.06% ( n = 167) before pregnancy to 14.08% ( n = 65), 12.39% ( n = 54), and 11.92% ( n = 51) during the three pregnancy trimesters ( P < 0.001), and consumption decreased from 8.71 cigarettes/day in the first trimester to 5.51 cigarettes/day in the second trimester ( P < 0.001) and 5.96 cigarettes/day in third trimester ( P = 0.0002 first versus third trimester). There was only a minimal decrease in the frequency of smoking among the partners, however: 38.44% ( n = 178) before pregnancy, and 36.07% ( n = 167), 32.72% ( n = 143), and 31.85% ( n = 136) during the three trimesters of pregnancy. The consumption of cigarettes did not decrease among partners: 11.75, 11.67, and 12.09 cigarettes/day ( P = 0.4299 first versus second trimester; P = 0.654 first versus third trimester). Women whose partner smoked were less likely to quit (adjusted odds ratio, aOR 0.26; 95% CI 0.12–0.55). Conclusions About one in ten pregnant women smoked and one in four was a passive smoker. Strategies to reduce tobacco exposure in pregnancy should include a focus on partner smoking. Tweetable abstract Pregnant women quit smoking cigarettes in pregnancy. What about their partners?