Materials/methods
POLAND
The study was conducted by the 1st Department of Anesthesiology and Intensive Care, Medical University of Warsaw, Poland. Study participants were recruited among patients qualified for elective LSG in the Department of General Surgery and Transplantology between February 2020 and October 2022. Approval for the study was granted by the Bioethics Committee of the Medical University of Warsaw (KR/5/2020), and the study was registered on 07.02.2020 with clinicaltrials.gov (NCT04260659). The study was compliant with the principles outlined in the Declaration of Helsinki, and the manuscript adheres to the applicable CONSORT guidelines.