Funding for this research was provided by:
deutsche rentenversicherung knappschaft-bahn-see (deutsche rentenversicherung knappschaft-bahn-see)
Karlsruher Institut für Technologie (KIT)
Received: 6 July 2021
Accepted: 6 September 2021
First Online: 17 September 2021
: The study is conducted in accordance with the Declaration of Helsinki. Study participation is voluntary. A participant can withdraw consent at any time without stating the reason and without any individual disadvantage for subsequent medical care. Their approval will be documented via their signature on the informed consent forms. The Ethics Committee of the Karlsruhe Institute of Technology approved the project on 10 June 2021 and covers all obesity centres where patients are recruited from.
: All results are reported as group-level statistics (e.g., means, standard deviations) and tracing to the person level is not possible. The manuscript does not contain any person’s individual data in any form.
: The authors declare that they have no competing interests.