Usage of an App-Based Addiction Prevention Program for German Vocational Students: Secondary Analysis of Data From a Cluster Randomized Controlled Trial

Diana Guertler   ^{1, 2} , PhD ;   Anne Möhring   ^{1, 2} , PhD ;   Dominic Bläsing   ³ , PhD ;   Christian Meyer   ^{1, 4} , PhD, Prof Dr ;   Hannah Schmidt   ^{5, 6} , PhD ;   Florian Rehbein   ⁷ , PhD, Prof Dr ;   Merten Neumann   ⁸ , Dipl Psych ;   Arne Dreißigacker   ⁸ , Dipl Soz ;   Anja Bischof   ⁵ , PhD ;   Gallus Bischof   ⁵ , PhD ;   Svenja Sürig   ⁵ , MSc ;   Lisa Hohls   ⁵ , MSc ;   Susanne Wurm   ⁴ , PhD, Prof Dr ;   Stefan Borgwardt   ⁵ , MD, Prof Dr Med ;   Severin Haug   ⁹ , PhD ;   Hans-Jürgen Rumpf   ⁵ , PhD, Prof Dr

¹ DZHK (German Centre for Cardiovascular Research), Partner Site Greifswald, Greifswald, Germany

² Department of Methods of Community Medicine, Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany

³ Helmholtz Institute for One Health, Greifswald, Germany

⁴ Department of Prevention Research and Social Medicine, Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany

⁵ Department of Psychiatry and Psychotherapy, University of Lübeck, Lübeck, Germany

⁶ Department of Pediatrics, University of Lübeck, Lübeck, Germany

⁷ Department of Social Work, FH (Fachhochschule) Münster University of Applied Sciences, Münster, Germany

⁸ Criminological Research Institute of Lower Saxony (KFN), Hannover, Germany

⁹ Swiss Research Institute for Public Health and Addiction, University of Zürich, Zürich, Germany