STUDY PROTOCOL FOR A GROUP RANDOMIZED CONTROLLED TRIAL OF A CLASSROOM-BASED INTERVENTION AIMED AT PREVENTING EARLY RISK FACTORS FOR DRUG ABUSE: INTEGRATING EFFECTIVENESS AND IMPLEMENTATION RESEARCH

Study protocol for a group randomized controlled trial of a classroom-based intervention aimed at preventing early risk factors for drug abuse: integrating effectiveness and implementation research

Abstract Background While a number of preventive interventions delivered within schools have shown both short-term and long-term impact in epidemiologically based randomized field trials, programs are not often sustained with high-quality implementation over time.This study was designed to support two purposes.The first purpose was to test the effe

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