A systematic review of the literature identified 15 studies (940 patients). The percent excessive weight loss (%EWL) for LSG varied from 33% to 90% and appeared to be sustained up to 3 years. The mortality rate was 0-3.3% and major complications ranged from 0% to 29% (average 12.1%). Operative time ranged from 49 to 143 min (average 100.4 min). Hospital stay varied from 1.9 to 8 days (average 4.4 days).