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). 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.

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.

Inclusion Criteria:

• Students in participating schools aged 11 to 19

Exclusion Criteria:

• Not attending participating schools

De-identified participant data will be available to other researchers upon request after completion of the current study in December 2022.

Data will become available after completion of the current study in December 2022, and will be available for five years afterwards.

Data access information will be provided by the Principal Investigator.