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This study aimed to evaluate the role of the Obesity Surgery Mortality Risk Score (OS-MRS) to predict the risk of post-operative adverse events, in addition to death, from any laparoscopic bariatric procedure.

The OS-MRS was applied to consecutive patients at a single hospital during October 2008–September 2009. The composite end point comprised one or more of the following adverse events: mortality, re-intervention, re-admission to hospital, venous thromboemobolism, or blood transfusion.

There were 381 patients (men, 19%). The median age was 43 years (range, 19–67 years), with 42% patients aged ≥45 years. The median weight was 126 kg (75–295 kg) and median BMI 46 kg/m² (30–84 kg/m²); 37% had BMI ≥50 kg/m². Twenty-seven percent of patients had hypertension and 3 …