NEW YORK Treating obese people with weight loss surgery dramatically delays or prevents the onset of type 2 diabetes, according to a new study.
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"We saw a marked delay (in the development of diabetes) over 15 years," said coauthor Dr. Lars Sjostrom of the University of Gothenburg in Sweden. "Some of those surgical patients will probably develop diabetes later. But over a lifetime, there will be a large difference."
Among the 1,658 volunteers who received surgery, mostly stomach stapling, the risk of developing diabetes was about one in 150 per year. The 1,771 people in the control group who received standard care had a risk four times higher: one in 35 per year.
"Most of the previous studies on bariatric surgery have focused on the remission of diabetes. This study is more about preventing diabetes," Ted Adams of the University of Utah, who was not connected with the research, told Reuters Health.
The improvement was seen even though the people who underwent surgery initially had a higher risk of developing diabetes than those in the control group.
"If anything, the surgery group was a bit heavier and had more risk factors than the control group at the start of the study, and still the outcome at 10 years and 15 years was much more favorable in the surgery group," Sjostrom told Reuters Health. "It's favorable in spite of these differences."
The team, which reported its results in the New England Journal of Medicine, also found that a person's starting body mass index - a measure of weight versus height - did not predict whether patients would develop type 2 diabetes. Blood sugar levels at the beginning of the study, before surgery, were better indicators.
Sjostrom said a similar effect has been seen in earlier studies looking at the impact of the surgery on rates of heart attack, stroke, cancer prevention and overall mortality.
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Weight loss surgery helps prevent diabetes
