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. 2016 Dec;26(4):864-879.
doi: 10.1111/jora.12235. Epub 2015 Nov 4.

Risk and Protective Factors for Early Substance Use Initiation: A Longitudinal Study of Mexican-Origin Youth

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Risk and Protective Factors for Early Substance Use Initiation: A Longitudinal Study of Mexican-Origin Youth

Olivia E Atherton et al. J Res Adolesc. 2016 Dec.

Abstract

Substance use initiation in adolescence is a critical issue, given its association with substance dependency and associated problems in adulthood. However, due to the dearth of fine-grained, longitudinal studies, the factors associated with early initiation are poorly understood, especially in minority youth. The present study examined substance use initiation in a sample of Mexican-origin youth (N=674) assessed annually from age 10 to 16. Using discrete-time survival analyses, we found that initiation escalated rapidly from late childhood to adolescence, and we identified a wide range of factors, from the individual to the cultural level of analysis, that significantly increased or decreased risk for early initiation. These findings have important implications for programs aimed at preventing early substance use by Mexican-origin youth.

Keywords: Mexican-origin families; adolescence; development; longitudinal; substance use.

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Figures

Figure 1
Figure 1
Lifetime prevalence of substance use initiation, separately for any substance and each individual substance.
Figure 2
Figure 2
Graphical representation of SEM-based discrete-time survival mediation analyses. For time-varying predictors and mediators, we conducted latent growth curve models to calculate the growth trajectory over time of each construct. Then, we saved the intercepts (representing the value of the predictor at age 10) and slopes (representing growth over time in the mediator) to be used as manifest variables in the mediation models. Time-invariant predictors and mediators are entered as is into the model.

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