title: Pre-operative weight loss does not predict weight loss following laparoscopic adjustable gastric banding.
abstract: BACKGROUND
  This study aimed to test the hypothesis that the amount of weight lost on a mandatory 2-week pre-operative very-low-calorie diet (VLCD) would predict the longer-term outcomes of laparoscopic adjustable gastric banding (LAGB).
  
  
  METHODS
  All patients treated with a primary LAGB from 21 October 2008 until 30 June 2010, who were prescribed a 2-week pre-operative VLCD, have been included in the study. Patient age, weight, BMI and excess weight (defined as weight above a BMI of 25) were extracted on the day of first visit, day of surgery and at the post-operative visits at 3, 12 and 24 months. From these data, percent excess weight loss (EWL) was calculated and compared at all time points.
  
  
  RESULTS
  The weight loss achieved on a mandatory 2-week pre-operative diet did not predict weight outcomes at 2 years (r = -0.008; p = 0.931). Using multivariate analysis, the best predictor of 24-month percent EWL was percent EWL at 3 months post operation (sr(2) = 0.34; p = 0.003).
  
  
  CONCLUSIONS
  Results from a pre-operative diet should not be used to predict the ultimate outcome of bariatric surgery. The weight loss at 3 months following LAGB was a strong predictor of longer-term outcomes. There may be potential for improving longer-term results with LAGB by better supporting patients who are not achieving good weight loss at this early time point.
authors: Centre for Obesity Research and Education, Monash University, Level 6, 99 Commercial Road, Melbourne, 3004, Australia, Wendy.Brown@monash.edu.
authors: Wendy A
authors: WA
authors: Brown
authors: Julia
authors: J
authors: Moszkowicz
authors: Leah
authors: L
authors: Brennan
authors: Paul R
authors: PR
authors: Burton
authors: Margaret
authors: M
authors: Anderson
authors: Paul E
authors: PE
authors: O'Brien
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D001315:Australia / Q000453:epidemiology; D015992:Body Mass Index; D031204:Caloric Restriction; D005260:Female; D005500:Follow-Up Studies; D015391:Gastroplasty; D006801:Humans; D010535:Laparoscopy; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000453:epidemiology / Q000601:surgery*; D011237:Predictive Value of Tests; D057234:Preoperative Period; D011446:Prospective Studies; D016896:Treatment Outcome; D015431:Weight Loss; D061217:Weight Reduction Programs / Q000379:methods
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