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Randomized Controlled Trial
. 2008 Jul 1;96(1-2):57-68.
doi: 10.1016/j.drugalcdep.2008.01.023. Epub 2008 Apr 22.

Substance use outcomes 51/2 years past baseline for partnership-based, family-school preventive interventions

Richard L Spoth  1 , G Kevin Randall, Linda Trudeau, Chungyeol Shin, Cleve Redmond
Affiliations
Randomized Controlled Trial

Substance use outcomes 51/2 years past baseline for partnership-based, family-school preventive interventions

Richard L Spoth et al. Drug Alcohol Depend. .

Abstract

This article reports adolescent substance use outcomes of universal family and school preventive interventions 5(1/2) years past baseline. Participants were 1677 7th grade students from schools (N=36) randomly assigned to the school-based Life Skills Training plus the Strengthening Families Program: For Parents and Youth 10-14 (LST+SFP 10-14), LST-alone, or a control condition. Self-reports were collected at baseline, 6 months later following the interventions, then yearly through the 12th grade. Measures included initiation-alcohol, cigarette, marijuana, and drunkenness, along with a Substance Initiation Index (SII)-and measures of more serious use-frequency of alcohol, cigarette, and marijuana use, drunkenness frequency, monthly poly-substance use, and advanced poly-substance use. Analyses ruled out differential attrition. For all substance initiation outcomes, one or both intervention groups showed significant, positive point-in-time differences at 12th grade and/or significant growth trajectory outcomes when compared with the control group. Although no main effects for the more serious substance use outcomes were observed, a higher-risk subsample demonstrated significant, positive 12th grade point-in-time and/or growth trajectory outcomes for one or both intervention groups on all measures. The observed pattern of results likely reflects a combination of predispositions of the higher-risk subsample, the timing of the interventions, and baseline differences between experimental conditions favoring the control group.

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Conflict of interest statement

Conflict of interest

There is no conflict of interest to report for any of the authors.

Figures

Fig. 1
Fig. 1
Growth in the adjusted means on Substance Initiation Index. Note: Substance Initiation Index combined lifetime use of alcohol, cigarettes, and marijuana and ranged from 0 (= no substances initiated) to 3 (= all three substances initiated).
Fig. 2
Fig. 2
Growth in adjusted means on monthly poly-substance use index for higher-risk subsample.
Fig. 3
Fig. 3
Growth in adjusted means on advanced poly-substance use index for higher-risk subsample.
See this image and copyright information in PMC

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