title: [Type 2 diabetes and metabolic syndrome before and after gastric bypass].
abstract: BACKGROUND
  Overweight and obesity are associated with an increased risk of acquiring type 2 diabetes and metabolic syndrome. We have assessed the prevalence of these conditions before and after gastric bypass surgery for morbid obesity.
  
  
  METHODS
  The patients included had undergone laparoscopic gastric bypass at Oslo University Hospital Aker in the period 01.01.2007 - 31.12.2007 and had follow-up data for more than six months. Type 2 diabetes was defined as one or more of the following: an established diagnosis of diabetes before surgery, fasting plasma glucose >or= 7.0 mmol/l or HbA1c >or= 6.5 %. The metabolic syndrome was defined according to criteria laid out by the National Cholesterol Education Program.
  
  
  RESULTS
  136 patients (79 % women) with a mean (+/- SD) age of 43 +/- 9 years were included. Mean follow-up time was 17 months (range 8 - 26). The patients' body mass index (kg/m2) was reduced from 47 +/- 6 before to 32 +/- 6 after surgery (p<0.001). 34 % of patients had type 2 diabetes before and 10 % after surgery (p < 0.001). 80 % of patients had metabolic syndrome before and 24 % after surgery (p < 0.001). Fasting plasma glucose, HbA1c, and all variables included in the definition of metabolic syndrome were statistically significantly improved after surgery.
  
  
  CONCLUSIONS
  Gastric bypass has favourable effects on type 2 diabetes. Blood glucose normalised in most patients after the operation. The prevalence of metabolic syndrome was significantly lower after surgery.
authors.affiliation: Senter for sykelig overvekt og Gastroenterologisk kirurgisk avdeling, Oslo universitetssykehus, Aker 0514 Oslo, Norway. t.t.sovik@medisin.uio.no
authors.forename: Torgeir T
authors.initials: TT
authors.lastname: Søvik
authors.forename: Babak
authors.initials: B
authors.lastname: Irandoust
authors.forename: Kåre I
authors.initials: KI
authors.lastname: Birkeland
authors.forename: Erlend T
authors.initials: ET
authors.lastname: Aasheim
authors.forename: Carl Fredrik
authors.initials: CF
authors.lastname: Schou
authors.forename: Jon
authors.initials: J
authors.lastname: Kristinsson
authors.forename: Tom
authors.initials: T
authors.lastname: Mala
mesh_terms: D000328:Adult; D003924:Diabetes Mellitus, Type 2 / Q000097:blood / Q000150:complications*; D005260:Female; D005500:Follow-Up Studies; D015390:Gastric Bypass; D006801:Humans; D008297:Male; D024821:Metabolic Syndrome / Q000209:etiology*; D008875:Middle Aged; D009767:Obesity, Morbid / Q000150:complications / Q000601:surgery*; D012189:Retrospective Studies