Prevention Needs and Target Behavior Preferences in an App-Based Addiction Prevention Program for German Vocational School Students: Cluster Randomized Controlled Trial

Diana Guertler   ^{1, 2, 3} , PhD ;   Elaine Kraft   ¹ , MD ;   Dominic Bläsing   ⁴ , PhD ;   Anne Möhring   ^{2, 3} , PhD ;   Christian Meyer   ^{1, 2} , 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   ¹ , PhD, Prof Dr ;   Stefan Borgwardt   ⁵ , MD, Prof Dr Med ;   Severin Haug   ⁹ , PhD ;   Hans-Jürgen Rumpf   ⁵ , PhD, Prof Dr

¹ Department of Prevention Research and Social Medicine, Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany

² DZHK (German Centre for Cardiovascular Research), partner site Greifswald, Greifswald, Germany

³ Department of Methods of Community Medicine, Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany

⁴ Helmholtz Institute for One Health, 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 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, Switzerland