Predictive Factors of Cholelithiasis After Prophylactic Administration of Ursodeoxycholic Acid Following Laparoscopic Bariatric Surgery: Tehran Obesity Treatment Study.

Early postoperative rapid weight loss as represented by 6-month BMI loss is the main predictor of de novo cholelithiasis after bariatric surgery, although this parameter does not have enough power for discrimination of postoperative cholelithiasis.