The effects of friends smoking and best friends smoking were almost significant Adolescents with higher levels of self-efficacy 1 year earlier were at lower risk to start smoking 1 year later compared to adolescents with low levels of self-efficacy ( OR = .56, 95% CI = .43–.73, P = .000).
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Smoking onset and the time-varying effects of self-efficacy, environmental smoking, and smoking-specific parenting by using discrete-time survival analysis.
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The sentences
The effect of friends’ smoking was marginally significant and no association between parental smoking and smoking onset was found.