[Comparison of surgical outcomes in two populations with risk adjustment using the POSSUM system].

Objective: To validate the application of the Physiological and Operative Severity Score for the enumeration of Mortality and morbidity (POSSUM) system in Uruguay in order to validate its broader utility not only for predicting surgical results but also for comparing surgical outcomes in two different healthcare institutions in Montevideo.

Patients And Method: A total of 815 patients in 2 institutions (one public and the other private) were prospectively studied. A POSSUM score was assigned, expected morbidity and mortality according to POSSUM [(and its variant, Portsmouth PSSUM (p-POSSUM)] were calculated, and postoperative complications and deaths were registered.