Evaluation of Universal Prevention Curriculum for Schools in Peru

This randomized controlled trial was conducted to evaluate a universal prevention curriculum (UPC) training for Peruvian school administrators and teachers to reduce substance use among students. Twenty-eight schools were randomly assigned to intervention and control conditions (14 per condition). Prevention leadership action teams were formed at intervention schools to implement evidence-based school policies and positive school climate activities, and a classroom substance use prevention curriculum. Substance use outcomes were assessed with repeated cross-sectional samples of students in 2018 and 2019. Multi-level analyses were conducted to assess intervention effects on students' substance use and related problems.