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People With BMI Below 35 Lost a Greater Percentage of Excess Weight, Had Diabetes Go Into Remission

June 16, 2011 -- Bariatric surgery works for less obese people, new research suggests.

People with a body mass index or BMI below 35, on whom the surgery is not typically done, lost weight, says researcher John M. Morton, MD, MPH, associate professor of surgery and director of bariatric surgery and surgical quality at Stanford University.

Their type 2 diabetes also went into remission.

Morton is presenting the study at the annual meeting of the American Society for Metabolic & Bariatric Surgery in Orlando.

His team looked at only 15 people with the lower BMI, including 12 with diabetes.

"I grant you it's a small number," he says. However, putting diabetes in remission sooner rather than later is good, he tells WebMD.

Study Background

"There is a movement afoot to take a look at [surgery for people with] BMIs of 30 to 35,'' Morton tells WebMD.

National Institutes of Health guidelines recommend gastric bypass surgery be reserved for people with a BMI of 35 or higher with an obesity-related condition such as diabetes, or for people with a BMI of 40 or higher.

However, in February, the FDA approved the Lap-Band weight loss procedure for less obese adults. In the procedure, an inflatable band is placed around the upper part of the stomach. It can now be used in people with a BMI of 30 or higher with at least one obesity-related condition.

In Morton's study, all patients had another type of procedure, the Roux-en-Y surgery, a type of gastric bypass surgery that makes the stomach smaller and allows food to bypass part of the small intestine.

About 220,000 bariatric surgeries are done each year in the U.S, as estimated by the American Society for Metabolic & Bariatric Surgery. The cost ranges from $11,500 to $26,000.

Study Details

Morton and his colleagues focused on 15 patients whose BMI had fallen below 35 while they were awaiting bariatric surgery.

Most had a BMI of about 34, Morton says. A person 5'10" who weighs 240 pounds has a BMI of 34.4.

The researchers compared the group with the lowest BMIs to 965 others whose BMIs were higher, ranging from 35 to 40, 40 to 50, and above 50.

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