• Titus Josef Brinker, Fabian Buslaff, Janina Leonie Suhre, Marc Philipp Silchmüller, Evgenia Divizieva, Jilada Wilhelm, Gabriel Hillebrand, Dominik Penka, Benedikt Gaim, Susanne Swoboda, Sonja Baumermann, Jörg Werner Walther, Christian Martin Brieske, Lena Jakob, Hannah Maria Baumert, Ole Anhuef, Selina Marisa Schmidt, Jonas Alfitian, Anil Batra, Lava Taha, Ute Mons, Felix Johannes Hofmann, Ailís Ceara Haney, Caelán Max Haney, Samuel Schaible, Thien-An Tran, Hanna Beißwenger, Tobias Stark, David A Groneberg, Werner Seeger, Aayushi Srivastava, Henning Gall, Julia Holzapfel, Nancy A Rigotti, Tanja Gabriele Baudson, Alexander H Enk, Stefan Fröhling, Christof von Kalle, Breno Bernardes-Souza, Rayanna Mara de Oliveira Santos Pereira, and Roger Thomas.
• Department of Translational Oncology, National Center for Tumor Diseases, German Cancer Research Center (DKFZ), University of Heidelberg, Heidelberg, Germany.
• JMIR Res Protoc. 2019 Apr 11; 8 (4): e13508.

BackgroundMost smokers start smoking during their early adolescence under the impression that smoking entails positive attributes. Given the addictive nature of cigarettes, however, many of them might end up as long-term smokers and suffering from tobacco-related diseases. To prevent tobacco use among adolescents, the large international medical students' network Education Against Tobacco (EAT) educates more than 40,000 secondary school students per year in the classroom setting, using evidence-based self-developed apps and strategies.ObjectiveThis study aimed to evaluate the long-term effectiveness of the school-based EAT intervention in reducing smoking prevalence among seventh-grade students in Germany. Additionally, we aimed to improve the intervention by drawing conclusions from our process evaluation.MethodsWe conduct a cluster-randomized controlled trial with measurements at baseline and 9, 16, and 24 months postintervention via paper-and-pencil questionnaires administered by teachers. The study groups consist of randomized schools receiving the 2016 EAT curriculum and control schools with comparable baseline data (no intervention). The primary outcome is the difference of change in smoking prevalence between the intervention and control groups at the 24-month follow-up. Secondary outcomes are between-group differences of changes in smoking-related attitudes and the number of new smokers, quitters, and never-smokers.ResultsA total of 11,268 students of both sexes, with an average age of 12.32 years, in seventh grade of 144 secondary schools in Germany were included at baseline. The prevalence of cigarette smoking in our sample was 2.6%. The process evaluation surveys were filled out by 324 medical student volunteers, 63 medical student supervisors, 4896 students, and 141 teachers.ConclusionsThe EAT cluster randomized trial is the largest school-based tobacco-prevention study in Germany conducted to date. Its results will provide important insights with regards to the effectiveness of medical student-delivered smoking prevention programs at school.International Registered Report Identifier (Irrid)DERR1-10.2196/13508.©Titus Josef Brinker, Fabian Buslaff, Janina Leonie Suhre, Marc Philipp Silchmüller, Evgenia Divizieva, Jilada Wilhelm, Gabriel Hillebrand, Dominik Penka, Benedikt Gaim, Susanne Swoboda, Sonja Baumermann, Jörg Werner Walther, Christian Martin Brieske, Lena Jakob, Hannah Maria Baumert, Ole Anhuef, Selina Marisa Schmidt, Jonas Alfitian, Anil Batra, Lava Taha, Ute Mons, Felix Johannes Hofmann, Ailís Ceara Haney, Caelán Max Haney, Samuel Schaible, Thien-An Tran, Hanna Beißwenger, Tobias Stark, David A Groneberg, Werner Seeger, Aayushi Srivastava, Henning Gall, Julia Holzapfel, Nancy A Rigotti, Tanja Gabriele Baudson, Alexander H Enk, Stefan Fröhling, Christof von Kalle, Breno Bernardes-Souza, Rayanna Mara de Oliveira Santos Pereira, Roger Thomas. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 11.04.2019.

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