Weight loss at six months is the surrogate of long-term treatment outcomes for obese Chinese with a BMI less than 35 kg/m2 undergoing Roux-en-Y gastric bypass

Summary: Background: Roux-en-Y gastric bypass (RYGB) is considered the gold standard procedure for bariatric surgery that leads to sustained weight loss and amelioration of obesity-related comorbidities. Objectives: To verify long-term efficacy and safety and to investigate the influence of early weight loss on post-RYGB long-term weight maintenance in obese Chinese with body mass index (BMI)