Predictive value of 6-minute walk test for weight loss after bariatric and metabolic surgery in individuals with class III obesity

Preoperative 6MWT performance provides promising prognostic information for early nonresponse to weight loss following MBS. The 6MWT/BMI ratio showed the strongest and most consistent predictive performance within our cohort, supporting its potential role as a valuable supplementary risk stratification tool. Absolute 6MWT distance may serve as a high-sensitivity screening tool. When used in conjunction with other clinical assessments, this two-step approach may help identify patients at risk for nonresponse and guide targeted perioperative interventions.