This study aims to identify factors that can predict complications related to anesthesia in patients undergoing weight-loss surgery. By looking at patient data from past surgeries, we hope to better understand which factors increase the risk of anesthesia problems, helping doctors improve patient safety during these procedures.

Inclusion Criteria:

• Adult patients (age ≥ 18 years)
• Patients who underwent a longitudinal gastrectomy (sleeve) between January 1, 2020, and June 30, 2021, at CHG, as part of bariatric surgery treatment.

Exclusion Criteria:

• Minor patients
• Patients who underwent a bariatric surgery other than sleeve gastrectomy
• Patients who objected to the use of their data for research purposes

The study participants will be selected from adult patients who underwent sleeve gastrectomy as part of bariatric surgery at the Gonesse Hospital (CHG) between January 1, 2020, and June 30, 2021.