Long-Term Outcome of One-Anastomosis Gastric Bypass: 10-Year Follow-Up of a Single Institution Series

This study aims to evaluate the long-term efficacy, safety, nutritional status, and resolution of obesity complications of patients following one-anastomosis gastric bypass (OAGB).

A retrospective observational study of patients who underwent OAGB in our center between January 2011 and December 2013 was performed.

During the study period, 152 patients underwent OAGB procedure in our center. Among them, 26 patients were lost to follow up and therefore were excluded from the data analysis. A total of 126 patients completed long-term follow-up of 10 years. The mean age of patients at baseline was 41 ± 12.5 years (range 20–68). At 10-year follow-up, mean excess weight loss (EWL) was 68.9 ± 22.8%. Mean BMI was 29.7 ± 12.9 kg/m², representing an overall BMI reduction of 10.6 kg/m². At 10-year follow-up among the 126 patients, 80% had resolution in DM, 71% had resolution in HTN, and 85% had resolution in OSA. There were no instances of severe malnutrition in the 126 patients in our study.

OAGB is an effective choice of bariatric/metabolic surgery for patients with higher BMI which provides good weight loss in terms of % TWL and % EWL without significant recurrent weight gain or inadequate weight loss with negligible nutritional deficiencies.