title: Visceral fat area as a new predictor of short-term diabetes remission after Roux-en-Y gastric bypass surgery in Chinese patients with a body mass index less than 35 kg/m2.
abstract: BACKGROUND
  Metabolic surgery has been proposed for inadequately controlled type 2 diabetes mellitus (T2DM) in association with obesity. However, prediction of successful T2DM remission after surgery has not been clearly studied in Chinese patients. The objective of this study was to predict the outcome in those with T2DM after metabolic surgery to help in patient selection.
  
  
  METHODS
  A retrospective review of prospectively collected data of 68 ethnic Chinese with mean body mass index (BMI) of 31.5 and T2DM were examined for the metabolic outcomes at 1 year after Roux-en-Y gastric bypass (RYGB). Visceral and abdominal subcutaneous fat areas were assessed using magnetic resonance imaging before and 1 year after RYGB. Remission was defined as a glycated hemoglobin (HbA1 c)<6.5% and no medications at 1 year. Binary logistic regression analysis was used to identify predictors.
  
  
  RESULTS
  At 1 year after surgery, the BMI in the study group decreased from 31.5±3.6 to 24.5±2.5 kg/m2. Remission was achieved in 50 patients (73.5%) at 1 year. Compared with patients in the nonremission group, patients in the remission group had a shorter duration of diabetes, lower preoperative HbA1 c level, higher fasting C-peptide level, and more visceral fat area (VFA). Preoperative BMI and waist circumference did not differ between the 2 groups.
  
  
  CONCLUSIONS
  The metabolic improvement in T2DM after RYGB in the mildly obese is greater with a shorter duration of diabetes, higher fasting C-peptide. Those who have more visceral adiposity may obtain greater benefit from RYGB.
authors.affiliation: Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Key Clinical Center for Metabolic Disease, Shanghai, China.
authors.forename: Haoyong
authors.initials: H
authors.lastname: Yu
authors.affiliation: Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Di
authors.affiliation: Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Key Clinical Center for Metabolic Disease, Shanghai, China.
authors.forename: Yuqian
authors.initials: Y
authors.lastname: Bao
authors.affiliation: Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.
authors.forename: Pin
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Key Clinical Center for Metabolic Disease, Shanghai, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Key Clinical Center for Metabolic Disease, Shanghai, China.
authors.forename: Yinfang
authors.initials: Y
authors.lastname: Tu
authors.affiliation: Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Han
authors.affiliation: Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Key Clinical Center for Metabolic Disease, Shanghai, China. Electronic address: wpjia@sjtu.edu.cn.
authors.forename: Weiping
authors.initials: W
authors.lastname: Jia
mesh_terms: D050154:Adiposity; D015992:Body Mass Index; D002096:C-Peptide / Q000097:blood; D002681:China; D003924:Diabetes Mellitus, Type 2 / Q000473:pathology / Q000628:therapy*; D015390:Gastric Bypass; D006801:Humans; D007328:Insulin / Q000097:blood*; D050152:Intra-Abdominal Fat / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D015999:Multivariate Analysis; D009765:Obesity / Q000473:pathology / Q000601:surgery; D012074:Remission Induction
chemical_list: D002096:C-Peptide; D007328:Insulin
keywords: Bariatric surgery; Gastric bypass; Insulin resistance; Intra-abdominal fat; Obesity