Early postoperative weight loss predicts nadir weight and weight regain after laparoscopic sleeve gastrectomy and Roux-en-Y gastric bypass.

Our findings demonstrate that higher WL at 6 and 12 months post bariatric surgery may be risk factors for WR at 4 years. Surgeons may need to follow patients with high early weight loss more closely and provide additional treatment options to maximize their long-term success.