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Is Surgery an Option for Mildly Obese?

Study Shows Surgery That Uses Adjustable Band May Be Effective
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WebMD Health News
Reviewed by Louise Chang, MD

May 1, 2006 -- Most weight loss surgeries are performed on patients who are morbidly obese, but new research suggests that one surgical option may be a safe and effective treatment for people who have much less weight to lose.

The study compared outcomes among mild to moderately obese people who either had laparoscopic adjustable gastric banding surgery or who followed an intensive weight loss program that did not include surgery.

In this surgery, an adjustable band was placed around the stomach via small incisions in the abdominal wall with the use of a special camera to help place it.

After two years, patients who had the gastric banding lost an average of 21% (45 pounds) of their initial body weight, compared to a 5.5% (12 pounds) weight reduction among patients whose intervention included strict calorie restriction, weight loss drugs, and other lifestyle interventions.

If confirmed, the findings could lead to a major shift in thinking about who is and is not a candidate for weight loss surgery, the study researchers say.

"It won't happen overnight," Paul E. O'Brien, MD, tells WebMD. "But in the United States alone you have 60 million people who are [mildly obese or heavier] and they suffer a wide range of health problems because of their weight. This is a very safe surgery that could be used to help many more people."

What's in a BMI?

The researchers measured obesity by calculating the patients' body mass index (BMI), a standardized measure based on height and weight.

A BMI of 18.5 to 24.9 is considered normal weight. People are considered overweight if their BMI is 25 to 29.9, and obese if they have a BMI of 30 or more.

A BMI of 40 or more is considered morbidly obese. To translate BMI to the bathroom scale:

  • A 5-foot-4-inch person would be considered overweight if they tip the scale at 175 pounds (BMI = 30), obese if they weigh 205 pounds (BMI = 35), and morbidly obese if they weigh more than 235 pounds (BMI = 40).
  • Someone who is 5 foot 7 inches and weighs 190 pounds would be considered overweight, while the same person would be considered obese at 194 pounds, and morbidly obese at 255 pounds.
  • A 6-foot tall person is considered overweight if they weigh between 185 and 221 pounds, obese if they weigh between 222 and 294 pounds, and morbidly obese at 295 plus.
  • Carrying 30 to 35 extra pounds is the difference between normal weight and obesity for most adults.
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