School of Kinesiology and Health Science, York University, Toronto, ON Canada M3J 1P3.
BMC Pregnancy Childbirth. 2010 May 24;10:24. doi: 10.1186/1471-2393-10-24.
Cigarette smoking carries a threat both to the expecting mother and her newborn. Data on the prevalence and predictors of smoking during pregnancy is limited in Canada. Canadian studies are mainly representative of specific cities and/or provinces. Therefore, the study aims to assess the prevalence of smoking during pregnancy and its associated risk factors throughout the Canadian provinces and territories.
The analysis was based on the Maternity Experience Survey targeting women aged > or =15 years who had singleton live births during 2005/06 in the Canadian provinces and territories. The outcome was ever smoking during the thirst trimester of pregnancy. Socio-economic factors, demographic factors, maternal characteristics, and pregnancy related factors that proved to be significant at the bivariate level were considered for a logistic regression analysis. Bootstrapping was performed to account for the complex sampling design.
The sample size was 6,421 weighted to represent 76,508 Canadian women. The prevalence of smoking during pregnancy was 10.5%, whereby smoking mothers consumed on average 7 cigarettes a day (95% Confidence interval - CI: 6.5-7.4; SD = 5.7). Regression analysis revealed that mothers who smoked during pregnancy were more likely to be of low socio-economic status, non-immigrant, single and passive smokers during pregnancy. Not attending prenatal classes and experiencing stressful events before/during pregnancy also increased the mothers' odds of smoking during pregnancy. While the age of the mother's first pregnancy was negatively associated with smoking during pregnancy, the mother's current age was positively associated with it.
Smoking during pregnancy is still prevalent among Canadian women. The findings may be useful to enhance smoking prevention programs and integrated health promotion strategies to promote positive health behaviors among disadvantaged pregnancies.
吸烟对孕妇及其新生儿都构成威胁。加拿大关于孕期吸烟的流行情况和预测因素的数据有限。加拿大的研究主要代表特定的城市和/或省份。因此，本研究旨在评估整个加拿大各省和地区孕期吸烟的流行情况及其相关危险因素。
该分析基于针对 2005/06 年期间在加拿大各省和地区分娩单胎活产的年龄≥15 岁的妇女进行的孕产妇经历调查。结局为孕期第三个三月期间曾吸烟。在单变量水平上具有统计学意义的社会经济因素、人口统计学因素、产妇特征和与妊娠相关的因素，被纳入逻辑回归分析。使用自举法来解释复杂的抽样设计。
样本量为 6421 例，加权后代表 76508 名加拿大妇女。孕期吸烟的流行率为 10.5%，即吸烟母亲平均每天吸烟 7 支（95%置信区间 CI：6.5-7.4；SD=5.7）。回归分析显示，孕期吸烟的母亲更有可能来自社会经济地位较低、非移民、单身和孕期被动吸烟的家庭。不参加产前课程和在妊娠前/期间经历压力事件也增加了母亲孕期吸烟的几率。虽然母亲第一次怀孕的年龄与孕期吸烟呈负相关，但母亲的当前年龄与孕期吸烟呈正相关。
吸烟在加拿大女性中仍然很普遍。这些发现可能有助于加强吸烟预防计划和综合健康促进策略，以促进弱势妊娠中的积极健康行为。
