The Climate Schools Combined (CSC) long-term follow-up study
The study will conduct a long-term (7-year) follow-up of the first RCT of a combined Web-based substance use and mental health prevention approach addressing the following research questions: RQ1: Is the combined approach used in the CSC program more effective in the long-term across the transition into early adulthood (ages 18-21 years) compared with: (1) universal substance use prevention (Climate Substance Use), (2) universal mental health prevention (Climate Mental Health), and (3) education as usual (control condition) for: reducing the use and harmful use of alcohol and cannabis; reducing overall symptom levels of anxiety and depression. RQ2: How cost-effective is a combined approach to prevention over the long-term?
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