Background:Research has shown that living in a smoke-free home has a positive effect on adolescents' perceived acceptance of smoking. However, the relationship between smoke-free homes and adolescent smoking behaviours remains unclear. The aim of this study was to examine the association between smoke-free homes and smoking susceptibility among high school students, and to determine whether these associations persist when analyses are stratified by familial smoking status.
Methods:We conducted a random cross-sectional survey (2012/2013 Youth Smoking Survey) of primary, junior and high school students in Canada (n = 47 203). Multivariable logistic regression analyses were used to examine the associations between smoke-free homes and susceptibility to smoking among never-smoking high school students, with and without stratification by familial smoking.Results: Analyses showed that adolescents living in a smoke-free home had reduced odds of being susceptible to smoking (odds ratio [OR] 0.582, 95% confidence interval [CI] 0.428-0.791) compared with their peers living in households where smoking was permitted. When adolescents had other family members who were smokers, having a smoke-free home was not significantly associated with reduced smoking susceptibility (OR 0.878, 95% CI 0.721-1.071).
Interpretation:Our results suggest that smoke-free homes may influence future smoking initiation. Optimal success in preventing youth smoking uptake necessitates having a coherent antismoking message between the home smoking environment and familial smoking behaviour.
AbstractResearch Research
CMAJ OPEN CMAJ OPEN, 4(2) E299This study looks to bridge the gap in the scientific literature with answers to the following questions: Are smoke-free homes associated with reduced smoking susceptibility among never-smoking adolescents; does this association persist after adjusting for familial smoking status; and does the association between smoke-free homes and reduced smoking susceptibility remain after stratification based on familial smoking status?
Methods
DesignThe Youth Smoking Survey is a nationally representative cross-sectional, biannual classroom-based survey that endeavours to provide estimates of tobacco use rates at national and provincial levels and capture issues influencing tobacco use (knowledge, social influences and attitudes). The 2012-2013 iteration was administered in 9 Canadian provinces (Manitoba declined to participate). Comparative estimates of 2010-2011 Youth Smoking Survey with and without Manitoba found no significant differences in smoking outcomes.
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ParticipantsThe Youth Smoking Survey was administered to 47 203 students enrolled in grades 6-12. The cohort was drawn from a random sample of private, public and Catholic schools. Students attending special schools (special needs, visuallyimpaired, military), or attending a school with no eligible grades or no classes with at least 20 students were excluded. The University of Waterloo (the principal coordinator of the Youth Smoking Survey), Health Canada ...