**4.1 30-day morbidity and mortality**

Mortality after LSG is currently low. A large study that included 134,142 patients where 69% of patients underwent LSG and 31% had RYGB found that the mortality and morbidity rates were significantly lower in LSG compared with RYGB (0.1% vs 0.2%; 5.8% vs 11.7%, respectively). The most important predictors of morbidity and mortality outcomes were BMI, albumin, and age [74].
