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Weight loss specific to indication, remission of diabetes, and short-term complications after sleeve gastrectomy conversion to Roux-en-Y gastric bypass: a systematic review and meta-analysis

Open AccessPublished:November 11, 2022DOI:https://doi.org/10.1016/j.soard.2022.11.004

      Abstract

      Laparoscopic sleeve gastrectomy (SG) is the most frequently performed bariatric procedure worldwide. Long-term complications such as insufficient weight loss (IWL) and gastroesophageal reflux disease (GERD) may necessitate SG conversion to Roux-en-Y gastric bypass (RYGB). The aim of this review was to determine the indication-specific weight loss and diabetes remission after SG conversion to RYGB (STOBY). Our objective was to extract all available published data on indication for conversion, weight loss, remission of diabetes, and short-term complications after STOBY. Single- and multicenter cohort studies including university hospitals and tertiary and academic centers. A systematic literature search was conducted to identify studies reporting outcomes following STOBY. A random effects model was used for meta-analysis. The search identified 44 relevant studies. Overall short-term (12-mo) excess weight loss (EWL) was 54.6% (95% confidence interval [CI], 46%–63%) in 23 studies (n = 712) and total weight loss (TWL) was 19.9% (95% CI, 14%–25%) in 21 studies (n = 740). For IWL, short-term (12-mo) pooled weight loss outcomes were 53.9% EWL (95% CI, 48%–59%) in 14 studies (n = 295) and 22.7% TWL (95% CI, 17%–28%) in 12 studies (n = 219), and medium-term (2–5 yr) outcomes were 45.8% EWL (95% CI, 38%–53%) in 7 studies (n = 154) and 20.6% TWL (95% CI, 15%–26%) in 9 studies (n = 206). Overall diabetes remission was 53% (95% CI, 33%–72%), and the perioperative complication rate was 8.2% (95% CI, 7.6%–8.7%). Revisional SG conversion to RYGB for IWL can achieve good weight loss outcomes and diabetes remission.

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