Study Population
bleeding, VTE
BLEEDING
According to the criteria for bariatric surgery in Switzerland, study inclusion criteria were a body mass index (BMI; calculated as weight in kilograms divided by height in meters squared) greater than 35, an age of 18 years or older, and failure of conservative treatment for 2 years. Participant race and ethnicity were documented by clinicians to show the demographic balance of the study population. Patients were ineligible if they were pregnant or breastfeeding, had active bleeding or a high risk of bleeding, or had a history of VTE (for additional exclusion criteria, see eMethods 1 in 