TY - JOUR T1 - Smoke-free homes, smoking susceptibility and familial smoking among never-smoking high school students: a cross-sectional analysis JF - CMAJ Open SP - E298 LP - E303 DO - 10.9778/cmajo.20160010 VL - 4 IS - 2 AU - Bruce Gregoire AU - Sunday Azagba AU - Mark Asbridge Y1 - 2016/06/07 UR - http://www.cmajopen.ca/content/4/2/E298.abstract N2 - 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. ER -