Purpose-To compare the relative influence of risk and protective factors across several domains on adolescent substance use in a large sample of youth.Methods-Cross-sectional survey data were collected from 6th, 8th, 10th, and 12th grade students in Pennsylvania (N = 91,778). Generalized linear mixed models were estimated for each grade level to examine associations among indices of 3 risk (individual, peer, and family) and 3 protective (family, school, and community) factors and (a) lifetime substance use and (b) recent substance use.Results-The risk factors were stronger predictors of substance use outcomes compared to the protective factors, regardless of grade level or substance use type. In particular, the individual and peer risk factors were strongly related to lifetime and recent use of cigarettes, alcohol, and marijuana. Among the protective factors, the strongest associations with substance use were found in the community domain. Several age-related differences in the associations were also found, suggesting that family and community factors were more salient among younger grades whereas peer and school factors were stronger among older adolescents.Conclusions-These findings provide support for the Social Development Model (SDM), which proposes that adolescent substance use is associated with factors across multiple spheres of influence. Age-related differences in these associations suggest that effective interventions to reduce adolescent substance use may need to emphasize different domains of risk and protective factors at different stages of adolescent development.
KeywordsAdolescence; age differences; risk factors; protective factors; substance use Recent epidemiologic surveys indicate that substance use by U.S. youth remains a matter of concern. For example, the 2006 Monitoring the Future results showed that among 12 th graders, most (72.7%) had tried alcohol at least once in their lives and almost half (42.3%) reported lifetime use of marijuana. Among the 8 th grade students, lifetime prevalence of alcohol exceeded 40% and nearly 16% reported trying marijuana at least once. Lifetime use of cigarettes was reported by nearly half (47.1%) of 12 th graders and almost one-fourth (24.6%)Corresponding Author: Michael J. Cleveland, The Methodology Center, 204 E. Calder Way, Suite 400, State College, PA 16801, Email: mjc37@psu.edu, Phone: 814-867-0333, Fax: 814-863-0000. Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. [1,2]. Moreover, even though the lifetime and annual prevalence rates have declined in the last decade, there is some evidence that the rat...