TTP6.06 Weight Loss Outcomes After Gastric Band Revision: Comparing Sleeve Gastrectomy, One-Anastomosis Gastric Bypass, and Roux-en-Y Gastric Bypass

Aims To compare 1- and 2-year weight loss outcomes following gastric band revisions to sleeve gastrectomy (SG), one-anastomosis gastric bypass (OAGB), and Roux-en-Y gastric bypass (RYGB). Methods This single-centre retrospective cohort study assessed patients that had revisional bariatric surgery after gastric banding. Patients with complete follow-up and weight data at 1- and 2-years were included in this study. Results were expressed as percentage excess weight loss (%EWL), based on a BMI of 25kgm-2. Results Of the 88 patients (mean age 49.6 years, 85% female) that completed follow-up, 13 converted to SG, 14 to OAGB, and 61 to RYGB. Mean %EWL at 1- and 2-years was 36.0% and 28.5% for SG, 72.6% and 77.1% for OAGB; and 53.0% and 55.7% for RYGB, respectively. There were no significant within-group differences in %EWL between 1- and 2-years (p=0.13, 0.15, and 0.21). However, there were significant between-group differences in %EWL at 1- and 2-years (p=0.004 and 0.0007, respectively). Post-hoc tests showed significant differences between OAGB and SG at 1- and 2-years (p=0.003 and p<0.001, respectively) and between RYGB and SG at 2-years only (p=0.019). There were no significant differences between OAGB and RYGB at 1- or 2-years (p=0.057 and 0.075, respectively). Conclusions Mean %EWL plateaued between 1- and 2-years within each group, and observed changes over time weren’t statistically significant. OAGB significantly outperformed SG at 1- and 2-years whilst RYGB outperformed SG at 2-years. Observed p values between both bypasses approached significance, suggesting a potential effect that warrants further investigation in a larger sample.