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Depressive Symptomology as a Moderator of Friend Selection and Influence on Substance Use Involvement: Estimates from Grades 6 to 12 in Six Longitudinal School-Based Social Networks

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Abstract

Although the contributions of friend selection and friend influence to adolescent homophily on substance use behaviors has been of enduring research interest, moderators of these processes have received relatively little research attention. Identification of factors that dampen or amplify selection and influence on substance use behaviors is important for informing prevention efforts. Whereas prior research has examined adolescent drinking, smoking, and marijuana use, the current study examined whether friend selection and friend influence operated on substance use involvement, an indicator of problematic use, and whether depressive symptomology moderated these processes. In addition, it examined whether these relationships varied from grade 6 to 12. The study used a cohort-sequential design in which three cohorts of youth (first surveyed in grades, 6, 7, and 8) in six school-based longitudinal social networks were surveyed up to seven times, yielding N = 6817 adolescents (49% female). Stochastic actor-oriented models were applied to test hypothesized relationships in the six networks, then results were synthesized in a meta-analysis. Depressive symptoms did not moderate selection or influence on substance use involvement at any grade level, but indirectly contributed to diffusion of substance use involvement through school networks via patterns of network ties. Research is needed on contextual factors, particularly in schools, that might account for when, if at all, depressive symptoms condition friend selection and influence on substance use.

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Authors’ Contributions

S.T.E. conceived of the study and drafted the manuscript. R.W.F. contributed to the conceptualization of the study, conducted the network analyses, and participated in the drafting of the manuscript. A.M.H. conceived of the study and contributed to the measurement and analysis. N.G. performed the measurement and contributed to the analysis. V.C. performed the measurement and contributed to the analysis. All authors contributed to, read, and approved the final manuscript.

Funding

Research reported in this publication was supported by the National Institutes of Health under award numbers R01 DA037215, R01 DA13459 and K01 DA035153 and by the Centers for Disease Control and Prevention under the award number R49 CCV423114.

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Correspondence to Susan T. Ennett.

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The authors declare that they have no conflict of interest.

Ethical Approval

The Institutional Review Board of the University of North Carolina at Chapel Hill approved all procedures, which were performed in accordance with ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

Informed Consent

A waiver of parental written informed consent was approved for the study; written assent was obtained from all adolescents included in the study.

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Ennett, S.T., Faris, R.W., Hussong, A.M. et al. Depressive Symptomology as a Moderator of Friend Selection and Influence on Substance Use Involvement: Estimates from Grades 6 to 12 in Six Longitudinal School-Based Social Networks. J Youth Adolescence 47, 2337–2352 (2018). https://doi.org/10.1007/s10964-018-0915-5

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  • DOI: https://doi.org/10.1007/s10964-018-0915-5

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