Randomized study of combined universal family and school preventive interventions: patterns of long-term effects on...

This study reports findings on a combined family and school-based competency-training intervention from an in-school assessment 2.5 years past baseline, as a follow-up to an earlier study of substance initiation. Increased rates of observed alcohol use and an additional wave of data allowed evaluation of regular alcohol use and weekly drunkenness, with both point-in-time and growth curve analyses. Thirty-six rural schools were randomly assigned to (a) a combined family and school intervention condition, (b) a school-only condition, or (c) a control condition. The earlier significant outcome on a substance initiation index was replicated, and positive point-in-time results for weekly drunkenness were observed, but there were no statistically significant outcomes for regular alcohol use. Discussion focuses on factors relevant to the mix of significant longitudinal results within a consistent general pattern of positive intervention-control differences.