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Can Diabetes Be Prevented?


WebMD Health News

June 11, 2000 (San Antonio) -- Because the complications of diabetes are so devastating, finding ways to prevent it has the attention of scientists worldwide. The results so far are mixed: Lifestyle changes and medications may or may not help with type 2, or "adult-onset," diabetes, while injections of small amounts of insulin may prevent type 1, or "juvenile-onset," diabetes.

With type 2, which is linked to obesity, the devil is in the details: Which lifestyle changes can realistically be made -- and maintained -- in day-to-day life? A Finnish study presented here at the annual meeting of the American Diabetes Association (ADA) showed promising results, while British researchers were disappointed in the protective benefits of both lifestyle changes and oral medications.

The Finnish study involved people with a condition known as impaired glucose tolerance, which is considered a risk factor for type 2 diabetes. Of the 532 people in the study, those who received intensive support for changes in diet and exercise saw their risk of developing diabetes drop by 58%, says lead investigator Jaako Tuomilehto, MD.

"We were surprised that the effect of the intervention was so large," says Tuomilehto, a professor of medicine at the National Public Health Institute of the University of Helsinki. "We would like to know, however, if our findings are applicable outside of Finland."

The big challenge for people who lose weight is to keep it off. But the Finnish doctors tell WebMD their results were "better than most."

All of the patients studied were clinically obese. Those who got the intensive support and advice lost, on average, 10 pounds each during the first year of the trial. And they gained very little of that weight back in the following years, says Tuomilehto.

Even if people regain some weight, "a temporary loss may help delay progression by a few years," incoming ADA president Robert Sherwin, MD, tells WebMD. "This delay would in turn help forestall complications." Sherwin, also a professor of medicine at Yale University School of Medicine in New Haven, Conn., did not take part in the study.

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