ASMBS: Gastric Bypass More Effective in Less Obese

More weight lost in patients with a BMI less than 35, with significant remission of diabetes

THURSDAY, June 16 (HealthDay News) -- Patients with a body mass index (BMI) less than 35 kg/m² may have better weight loss outcomes after gastric bypass surgery than those with a higher BMI, according to a study presented at the annual meeting of the American Society for Metabolic and Bariatric Surgery, held from June 12 to 17 in Orlando, Fla.

Shushmita Ahmed, from Stanford University in California, and colleagues compared the outcomes of the laparoscopic Roux-en-Y gastric bypass (LRYGB) between patients with BMI less than and more than 35 kg/m², in 980 patients who underwent LRYGB from 2004 to 2010. Participants were grouped into four BMI categories: less than 35 kg/m² (group 1), between 35 and 39.9 kg/m² (group 2), between 40 and 49.9 kg/m² (group 3), and more than 50 kg/m² (group 4).

The investigators found that there was a significant difference in the preoperative time in minutes in the four groups (170.3, 177.3, 182.9, and 194.6, respectively), but not with respect to length of stay in hospital. The percent excess weight loss varied significantly between the four groups at three months (76.1, 66.0, 46.2, and 34.0 percent, respectively), six months (116.7, 91.9, 70.0, and 51.7 percent, respectively), and 12 months (167.1, 112.0, 85.3, and 67.1 percent, respectively). The number of complications or remissions after surgery did not vary between the BMI categories except for significant remission of diabetes in patients with a BMI less than 35 kg/m².

"These results demonstrate LRYGB may be safely and effectively accomplished in patients with a BMI <35 kg/m², particularly in patients with diabetes," the authors write.

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