The circumference of a man’s waist is a better predictor of his risk of developing type 2 diabetes than his body mass index (BMI), which is a weight-to-height ratio, or waist-to-hip ratio alone. This finding, published in the March 2005 issue of the American Journal of Clinical Nutrition, is based on data collected from 27,270 men tracked over 13 years who participated in the Harvard Health Professionals Follow-Up Study.
Men who had larger waists (assessed using waist circumference and waist-hip ratio) or higher overall body fat (indicated by BMI) had a greater risk of developing type 2 diabetes. The researchers grouped the study participants into five groups according to their waist size. Compared to those in the group with the smallest waists (29-34 inches), the other groups (34.3-35.9 inches, 36-37.8 inches, 37.9-39.8 inches, 40-62 inches) were 2, 3, 5 and 12 times more likely to develop diabetes, respectively. Similarly, risk was 2, 3, 4 and 7 times greater when waist-hip ratio was measured in men; and 1, 2, 3 and 8 times greater when BMI was measured.
“Both BMI and waist circumference are useful tools to assess health risk,” said the study’s lead author, Youfa Wang, PhD, MD, assistant professor with the Center for Human Nutrition at the Johns Hopkins Bloomberg School of Public Health. “But abdominal fat measured by waist circumference can indicate a strong risk for diabetes whether or not a man is considered overweight or obese according to his BMI.”
Youfa Wang | EurekAlert!
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