Bariatric surgery appears efficacious compared to st and ard care in reducing BMI .
Weight losses are greatest with diversionary procedures , intermediate with diversionary/restrictive procedures , and lowest with those that are purely restrictive .
Compared with Roux-en-Y gastric bypass , adjustable gastric b and ing has lower weight loss efficacy , but also leads to fewer serious adverse effects
Superior Gastric Reduction Procedure for Morbid Obesity; A Prospective, Randomized Trial
A prospect i ve r and omized clinical trial was undertaken to compare the effects of  gastric bypass with Roux-en-Y gastro-jejunostomy and a gastric partitioning procedure .  Operative groups were comparable , with regard to preoperative weight , age , sex , historic findings and operative complications . Postoperative weight loss was followed for one year . Patients receiving the gastric partitioning procedure  showed significantly poorer weight loss as early as three months postoperatively than did those receiving gastric bypass .  This poorer performance persisted throughout the study period
Bariatric surgery appears efficacious compared to st and ard care in reducing BMI .
Weight losses are greatest with diversionary procedures , intermediate with diversionary/restrictive procedures , and lowest with those that are purely restrictive .
Compared with Roux-en-Y gastric bypass , adjustable gastric b and ing has lower weight loss efficacy , but also leads to fewer serious adverse effects