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Reducing Body Mass Index Cuts Diabetes Risk in Obese Teenagers

by Thilaka Ravi on June 5, 2013 at 7:44 PM
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Reducing Body Mass Index Cuts Diabetes Risk in Obese Teenagers

Research shows obese teenagers who reduce their body mass index (BMI) by 8 percent or more display remarkable improvements in insulin sensitivity, a crucial metabolic factor related to the later development of type 2 diabetes.

The teens followed a family-based, lifestyle-modification weight loss program that offers the potential to become a broader model.

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BMI is a measure of body weight adjusted for height.

"This threshold effect that occurs at 8 percent suggests that obese adolescents don't need to lose enormous amounts of weight to achieve improvements," said pediatric endocrinologist Lorraine Levitt Katz, M.D., of the Diabetes Center for Children at The Children's Hospital of Philadelphia.
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"The improvements in insulin sensitivity occurred after four months of participating in a lifestyle-modification program," Katz stated.

The study team analyzed results in 113 primarily urban adolescents, aged 13 to 17, of whom 81 percent were female, and 62 percent were African American. At the start of the study, their mean BMI was 37.1, placing them in the severely obese range. None had type 2 diabetes, but their obesity placed them at high risk to develop the disease in the future.

An important goal of the study was to determine the threshold of weight loss that significantly impacted insulin sensitivity, glucose tolerance and the presence of metabolic syndrome (MS). MS, as well as abnormal values in insulin sensitivity and glucose tolerance, is associated with the development of type 2 diabetes. In type 2 diabetes, the body is unable to produce enough, or to properly use, insulin. Improved insulin sensitivity reflects a better ability to process insulin.

The main finding of the current study was a significant improvement in all measures of insulin sensitivity. There was also a trend toward improvement in metabolic syndrome.

The threshold of 8 percent-the level at which a decreased BMI showed improved insulin sensitivity-was consistent with results found previously in adults.

Importantly, said first author Pamela Abrams, while the ideal goal is to achieve normal weight levels, you don't need to be skinny to see improvements. This 8 percent reduction in BMI is achievable, and BMI is easy for primary care physicians to track.

The authors added that this study was relatively small, and that future research in larger numbers of patients is needed to reveal longer-term results, and to investigate further effects on adolescent metabolism and health.

The findings appeared online last month in The Journal of Pediatrics.

Source: ANI
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