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Article History

Received: 29 September 2021

Accepted: 7 October 2021

First Online: 23 October 2021

Declarations

:

: This study was approved by the Hannover Medical School’s and University of Hildesheim’s ethics committee. There are no predetermined criteria for discontinuing or modifying the trial. No anticipated adverse consequences are anticipated for trial participants. In accordance with the ethics approval for the project, any protocol modification will be referred to the Hannover Medical School’s ethics committee. All participating communities completed an informed consenting process with a member of the research team. Participation in the Youth Survey requires written consent from the parents and students. In the cross-sectional and longitudinal survey no personal information from students will be requested. Prior to the longitudinal survey, we will collect personal data on students and parents that will be stored separately from the survey data. The raw data sets obtained from the surveys are subjected to a quality control after completion of the individual survey waves and any necessary adjustments are made. The raw data sets and the quality-controlled data sets are stored. Analysis datasets are created from the quality-controlled datasets. Thus, the analysis datasets contain pseudonymised longitudinal data. Cross-sectional datasets are factually anonymous. Results of the prospective analyses will only be published on an aggregated level. A data monitoring committee is not needed for the purposes of this study given that authors are not blinded, and that the overall risk for harm is low. Absolutely anonymised datasets will be published at the end of the study in the Data Archive for Social Sciences.

: Not applicable.

: The authors declare that they have no competing interests.