Abstract
To determine the prevalence of smoking, low levels of physical activity, and missing breakfast among students (n=318) in grades 9 through 12 in three schools in southwestern Ontario; to see if these behaviours were associated; and, whether there were gender differences. A self-administered survey was conducted in grade 10 English classes. The response rate was 87.1%. The prevalence of smoking was 36.2%; there was no gender difference. Only 42.8% of students ate breakfast daily; 48.8% of boys and 36.1% of girls (chi2 = 5.2; p<0.05). A higher proportion of boys (77.1%) were active for at least 30 minutes > or = 3 times/week compared to girls (66.0%) (chi2 = 4.8; p<0.05). Students who were active > or = 3 times/week were more likely to eat breakfast daily and, among boys, 60.4% of non-smokers ate breakfast daily compared to 31.9% of those currently smoking (chi2 = 13.3; p<0.001). There were no differences among girls. More girls (63.9%) were concerned about gaining weight compared to boys (36.1%) (chi2 = 37.7; p<0.001). Among girls, a higher proportion of those who were concerned about gaining weight were less likely to engage in physical activity or smoke, and more likely to skip breakfast compared to those who were not concerned. Weight concern was not associated with frequency of physical activity, smoking, or breakfast consumption among boys. The high prevalence rates for these behaviours suggests that interventions in high schools should include daily physical activity, promotion of breakfast eating (either at home or in the school), and encouragement to quit smoking.
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