Failure of adjustable gastric banding: starting BMI of 46 kg/m2 is a fulcrum of success and failure

Surgery for Obesity and Related Diseases : Official Journal of the American Society for Bariatric Surgery
Brad SnyderErik Wilson

Abstract

To determine the body mass index (BMI) located at the fulcrum of success and failure in a prospective study conducted at the University of Texas Health Science Center at Houston. On average, our patients whose percentage of excess weight loss (%EWL) was >50% at 1 year had a significantly lower BMI than those with <30% EWL. We prospectively collected the weight loss data for 430 patients who had had an adjustable gastric band placed. We stratified the %EWL within 1 year for patients with a BMI of 30-59 kg/m2. A line was generated for the %EWL over time for BMI groups of 30-39, 40-49, and 50-59 kg/m(2) and compared with the average %EWL over time. The y-intercepts of the resulting four lines were graphed against the average BMI for each group. The generated y-intercept line had an R2 of .9237. Using the equation of this line and the known y-intercept for the average, we solved for x, resulting in a BMI of 46 kg/m2. Patients with a BMI <46 kg/m2 had a 50% EWL at 1 year, and those with a BMI >46 kg/m2 had only a 33% EWL at 1 year. The %EWL between the groups was significantly different at all measured intervals (P <.0001). A BMI of 46 kg/m2 identifies those at high risk of failure to lose a significant percentage of excess weight a...Continue Reading

References

Aug 6, 2000·Obesity Surgery·M PaganelliG Ferla
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Mar 27, 2004·ANZ Journal of Surgery·Eliza Ann TweddleStephen Blamey
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Mar 3, 2007·Surgery for Obesity and Related Diseases : Official Journal of the American Society for Bariatric Surgery·Luigi AngrisaniVincenzo Borrelli

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Citations

Jan 1, 2010·Diabetes, Metabolic Syndrome and Obesity : Targets and Therapy·Brad SnyderErik Wilson
Oct 25, 2012·Surgical Endoscopy·Jonathan AfokeRichard Welbourn
Sep 28, 2010·Surgery for Obesity and Related Diseases : Official Journal of the American Society for Bariatric Surgery·David S Tichansky
Jul 1, 1991·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·J W McCourtS Barnwell

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