Waist Size Predicts Diabetes Risk
Men Should Aim for Waist Size of 37 Inches or Less, Researchers Say
March 10, 2005 - A man's waist size may say much more about his risk of
than previously thought.
A new study suggests that a man's waist size is a better indicator of type 2
diabetes risk than other currently used measures, such as waist-to-hip ratio
(BMI, a measure of weight in relation to
Doctors use these measures to estimate a patient's risk of developing type 2
diabetes and advise them how to lower their risk, such as by losing weight and
changing their diet.
Current cutoffs say that men should have a waist size of less than 40 inches
to help prevent diseases such as heart disease, diabetes, and cancer.
But researchers say the cutoff for a man's waist size may need to be lowered
to 37 inches. At that waist size researchers accurately identified more than
80% of the type 2 diabetes cases that developed in a large group of men
followed over 13 years.
Waistline Reveals Diabetes Risk
In the study, researchers compared the effectiveness of BMI, waist size, and
waist-to-hip ratio in predicting the risk of type 2 diabetes in more than
27,000 men. Results appear in the March issue of the American Journal of
All of the men had their BMI, waist size, and waist-to-hip measurements
taken when the study began and were then followed for 13 years.
Men who had a waist size of 40 inches or more had the highest risk of type 2
diabetes. These men were 12 times more likely to develop the disease than those
with a waist size of 34 inches or less.
Men with a BMI of 25 or more also were significantly more likely to develop
type 2 diabetes.
Researchers say the results suggest that currently recommended cutoffs for
estimating type 2 diabetes risk be lowered. Currently those cutoffs are 25 for
BMI and 40 inches for a man's waist size.
But the study shows that lower cutoffs identified a significantly greater
proportion of the type 2 diabetes cases.
Type 2 diabetes risk rose progressively as waist size climbed above 34
- A waist size of 34 to 36 doubled diabetes risk.
- A waist size of 36 to 38 inches nearly tripled the risk.
- A waist size of 38 to 40 inches was associated with five times the
- A waist size of 40 to 62 inches was associated with 12 times the risk.