The present study examined the relationships among parental beliefs about efficacy in the prevention of adolescent substance use, parenting practices, adolescent competence skills, and substance use. Data were obtained from a sample of 2015 parent-adolescent dyads recruited from 30 junior high schools in Taipei City and Taouyun County, Taiwan, 2010. Adolescent and parent self-administered questionnaires were collected. Multivariate analysis results showed that male adolescents from low SES families were more likely to use tobacco/alcohol, while adolescents with higher efficacy parents and with higher levels of competence skills were less likely to use tobacco/alcohol. In conclusion, parental efficacy plays a crucial role in enhancing parenting practices, promoting adolescents' competence skills, and decreasing adolescent substance use.
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