Diabetes, Metabolic Syndrome and Obesity (Jul 2022)

Long-Term Weight Loss Outcome of Laparoscopic Sleeve Gastrectomy Predicted by the Percentage of Excess Weight Loss at 6 Months in Chinese Patients with Body Mass Index ≥ 32.5 Kg/m2

  • Wang L,
  • Tian C,
  • Xu G,
  • Sang Q,
  • Chen G,
  • Yu C,
  • Wuyun Q,
  • Wang Z,
  • Chen W,
  • Amin B,
  • Wang D,
  • Lian D,
  • Zhang N

Journal volume & issue
Vol. Volume 15
pp. 2235 – 2247

Abstract

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Liang Wang,1 Chenxu Tian,2 Guangzhong Xu,2 Qing Sang,1 Guanyang Chen,2 Chengyuan Yu,1 Qiqige Wuyun,2 Zheng Wang,2 Weijian Chen,2 Buhe Amin,2 Dezhong Wang,3 Dongbo Lian,2 Nengwei Zhang2 1Surgery Centre of Diabetes Mellitus, Peking University Ninth School of Clinical Medicine, Beijing, People’s Republic of China; 2Surgery Centre of Diabetes Mellitus, Capital Medical University Affiliated Beijing Shijitan Hospital, Beijing, People’s Republic of China; 3General Surgery, Aerospace Center Hospital, Beijing, People’s Republic of ChinaCorrespondence: Dongbo Lian; Nengwei Zhang, Email [email protected]; [email protected]: To evaluate the predictive effect of the initial weight loss on the long-term weight loss in Chinese patients with a body mass index (BMI) ≥ 32.5 kg/m2 who underwent LSG.Patients and Methods: The follow-up was completed via phone or WeChat for outpatients and at the hospital for inpatients. We evaluated the BMI, percentage of excess weight loss (%EWL), and type 2 diabetes mellitus, hypertension, and hyperlipidemia statuses. Linear and logistic regression analyses were performed on the relationship between the initial and long-term weight loss. The optimal cut-off value was determined by receiver operating characteristic (ROC) curve analysis.Results: We enrolled 307 patients, with a median preoperative BMI of 39.68 (35.68, 45.47) kg/m2. %EWL ≥ 50% was regarded as successful weight loss, and 76.55% of the patients lost their weight successfully. (Reviewer #1, comment #4) %EWL at 6 months and 5 years were positively correlated (P < 0.001). Further, the following linear equation could express the relationship: (%EWL5 years = 29.193 + 0.526 × %EWL6 months). %EWL ≥ 58.57% at 6 months was the best predictor of successful weight loss at 5 years after LSG (Reviewer #1, comment #5) (sensitivity, 73.62%; specificity, 73.61%; AUC value, 0.780). Internal verification of the prediction model revealed satisfactory results in terms of discrimination and calibration.Conclusion: In Chinese patients with BMI ≥ 32.5 kg/m2 who underwent LSG, %EWL at 6 months and 5 years were correlated. %EWL ≥ 58.57% at 6 months was a predictor of successful long-term weight loss.Keywords: laparoscopic sleeve gastrectomy, obesity, weight loss, prognosis

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