Weight Loss Expectations After Laparoscopic Gastric Bypass Are Influenced By Preoperative Body Mass Index.

BACKGROUND: Specific guidelines of expected weight loss after laparoscopic Roux-en-Y gastric bypass (LRYGB) in relation to preoperative body mass index (BMI) do not exist. Published weight loss outcomes after LRYGB are usually reported as a mean or median of the population examined as a whole. OBJECTIVE: To examine whether preoperative BMI influences percent of excess weight loss (EWL) and change of actual body weight (ABW) and BMI after LRYGB. METHODS: Between 2004 and 2007 290 patients underwent LRYGB by one surgeon. Patients were stratified by BMI (< 40, 40-49.9, 50-59.9 and > 60 Kg/m2) in groups I to IV respectively. All patients were followed postoperatively by the surgeon. BMI and ABW change was defined as the difference between the previous and present time-interval and was calculated for each froup every 3 months for the first year and annually thereafter. P < 0.05 was considered significant. RESULTS: There was a statistically significant, progressive reduction of %EWL from group I to IV for each of the following time intervals postoperatively: 3 months (I: 45.1%, II: 33.4%, III: 26%, IV: 22.3%, p

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Program Number: P051

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