Predicting 90-day mortality after bariatric surgery: an independent, external validation of the OS-MRS prognostic risk score

In these 10 U.S. healthcare delivery systems, the OS-MRS appears valid-albeit with the caveat that we observed a small number of deaths. The OS-MRS appears useful for identifying the small fraction of patients at high risk for 90-day mortality after open and laparoscopic RYGB.