What Studies Tell Us

Individual results vary. Risks and benefits of each treatment should be discussed with a doctor.

† Variation comes from different surgery procedures. Less than 1 in 20 people had <5% total weight loss 5 years after Roux-in-y Gastric Bypass.. However, for Sleeve Gastrectomy patients 2 in 20 had <5%TWL 5 years after surgery.

‡ Variation comes from different surgery procedures. !6 out of 20 sleeve gastrectomy patients maintained >20% total weight loss 5 years after surgery. 18 out 20 roux-en-y gastric bypass patients maintained >20% TWL 5 years after surgery. N=919. 

1) Look Ahead research group. Eight year weight losses with an intensive lifestyle intervention: the look Ahead study. Obesity. 2014. 2) Wilding, Batterham et al. Step Trial Extension. 3) Rubino et al. Step 4. 4) Tettero OM, Monpellier VM, Janssen MC et al. Early postpoperative weight loss predicts weight loss up to 5 years after roux-en-y gastric bypass, banded roux-en-y gastric bypass, and sleeve gastrectomy. Obesity Surgery. 2022. doi.org/10.1007/s11695-022-06166-x 5) 6) Internal analysis of the difference between <5% and >20% TWL 5 years post-op. 2023. 7) Sanchez-Cordero, Sergi t al. Analysis of the variability in different criteria to define the success of bariatric surgery: retrospective study 5-year follow-up after Sleeve Gastrectomy and Roux-en-Y Gastric Bypass. J clin Med. 2023. doi: 10.3390/jcm12010187