One Anastomosis Gastric Bypass Versus Roux-en-Y Gastric Bypass for Obesity: a Systematic Review and Meta-Analysis of Randomized Clinical Trials.

OAGB is possibly associated with more body weight loss compared with RYGB in patients with obesity, despite the low quality of evidence caused by inconsistent of the effect of biliopancreatic limb length in OAGB group. This benefit appears to be confined to OAGB using the extended length of the biliopancreatic limb but not to OAGB using the standard length of the biliopancreatic limb, compared with RYBG. Additional large clinical studies are needed to assess the impact of limb length in OAGB.