Mobile App-Based Coaching for Alcohol Prevention among Adolescents: Pre-Post Study on the Acceptance and Effectiveness of the Program "MobileCoach Alcohol".

BACKGROUND:At-risk alcohol use, particularly binge drinking, is widespread among adolescents and young adults in most Western countries. MobileCoach AlcoholMETHODS:Longitudinal pre-post study among upper secondary and vocational school students in Switzerland. Within the MobileCoach AlcoholRESULTS:Between October 2020 and July 2022, the program was advertised in upper secondary and vocational schools. Recruiting schools and school classes was difficult due to the COVID-19 containment measures in place during this period. Nevertheless, the program could be implemented in 61 upper secondary and vocational school classes with a total of 954 participating students. Three out of four students who were present in the school classes participated in the MobileCoach AlcoholCONCLUSIONS:The mobile app-based MobileCoach Alcohol