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Due to the retrospective nature of the study, informed consent could not be obtained directly from the patients. However, as a university hospital, all patients admitted to the clinic provide general approval for their data to be used in scientific studies.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval and consent to participate"}},{"value":"Consent for publication was obtained from all participants.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"Not applicable.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Clinical trial number"}},{"value":"The authors declare that they are responsible for the scientific content of the article, including study design, data collection, analysis and interpretation, writing, part or all of the outline, preparation and scientific review of the content, and approval of the final version of the article. This study is part of a medical specialization thesis, which is included in the National Thesis Database of Turkey. Publishing the thesis in a form different from the national database is legally prohibited. The study period coincided with the COVID-19 pandemic, during which Roux-en-Y Gastric Bypass (RYGB) was more commonly performed due to clinical preferences, and fewer Vertical Sleeve Gastrectomy (VSG) procedures were conducted. For transparency, the relevant national regulations can be accessed via\n                      \n                      .","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Scientific responsibility Statement"}},{"value":"The authors declare no competing interests.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"237"}}