12.7 1999 to 2005 in 1, 293 grade 7, age 0.68, 1.01); attending schools located in attend a low SES school (OR 12-13, students in 10 secondary neighbourhoods with smoking intolerant 1.7, 95% CI 1.2, 2.4; p<0.01) schools. 7 English and 3 French restaurants, HR=0.85 (0.68, 1.07). There Setting language secondary public schools, was no association between corner store External validity Montreal, Canada smoking intolerance and smoking initiation Convenience sample limits Participant selection generalisability of this Study design Impact by SES variable Convenience sample, 54.5% student Prospective cohort study response HR for cigarette use initiation for low SES Validity of author’s conclusion school, in schools=1.11 (0.88, 1.36), Study did not aim to assess Objective p=0.40; in restaurants=1.04 Participant characteristics differential impact by SES. (0.83,1.31)p=0.74; in corner stores=1.10 To describe the association between Mean age 12.7 (SD 0.5), 11-16; (0.88, 1.37) p=0.59 smoking intolerance in schools, 51% male restaurants and corner stores near schools and the initiation of smoking Author’s conclusion of SES impact Outcomes in adolescents Not stated Smoking initiation Intervention details SES variable Longitudinal cohort and direct Parental education observation Schools classified as low/medium/high SES based on mean household income Study analysis Cox proportional hazards modelling, limited to n=868 never smokers at baseline Details Method Results Comments Multiple policy interventions Author, year Data sources General population impact Internal validity
12.7 Setting Montreal, Canada Study design Prospective cohort study Objective To describe the association between smoking intolerance in schools, restaurants and corner stores near schools and the initiation of smoking in adolescents SES variable Parental education Schools classified as low/medium/high SES based on mean household income Study analysis Cox proportional hazards modelling, limited to n=868 never smokers at baseline 1999 to 2005 in 1, 293 grade 7, age 12-13, students in 10 secondary schools. 7 English and 3 French language secondary public schools, Participant selection Convenience sample, 54.5% student response Participant characteristics Mean age 12.7 (SD 0.5), 11-16; 51% male Outcomes Smoking initiation Intervention details Longitudinal cohort and direct observation 0.68, 1.01); attending schools located in neighbourhoods with smoking intolerant restaurants, HR=0.85 (0.68, 1.07). There was no association between corner store smoking intolerance and smoking initiation Impact by SES variable HR for cigarette use initiation for low SES school, in schools=1.11 (0.88, 1.36), p=0.40; in restaurants=1.04 (0.83,1.31)p=0.74; in corner stores=1.10 (0.88, 1.37) p=0.59 Author’s conclusion of SES impact Not stated attend a low SES school (OR 1.7, 95% CI 1.2, 2.4; p<0.01) External validity Convenience sample limits generalisability of this Validity of author’s conclusion Study did not aim to assess differential impact by SES. Details Method Results Comments Multiple policy interventions Author, year Data sources General population impact Internal validity
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