This Brazilian cohort study evaluated 4,344 morbidly obese patients (79% female; median age 34.9 years; median BMI 42 kg/m²) who underwent open Roux-en-Y gastric bypass between 2001 and 2010. The 30-day mortality rate was 0.55%, and the 10-year mortality rate was 3.34%. Over half (53.7%) of the deaths were related
