Youve heard for a while now that BMI has definite limitations as - TopicsExpress



          

Youve heard for a while now that BMI has definite limitations as an indication of overall health—and a new study suggests that there may be another key number you should look at: A greater waist circumference is associated with a higher risk of death, regardless of your BMI, according to new research published by the Mayo Clinic. Researchers looked at data on 650,000 participants (collected during 11 previous studies), comparing their waist circumference measurements to their risk of all-cause mortality. Turns out, a larger waist was strongly linked to a higher risk of death: Women with a waist circumference of at least 37.5 inches, for example, were 80 percent more likely to die during the studies follow-up periods (the median of which was nine years) than women with a waist circumference of less than 27.5 inches. Whats more, each two-inch increase in waist circumference was correlated with a nine percent increase in mortality risk for women. Now, we know what youre thinking: Women with a greater waist circumference probably also had a higher BMI, right? While it is true that the two were correlated, the association between waist circumference and all-cause mortality held up even after researchers controlled for BMI. That doesnt mean BMI was totally useless, though: For women with a BMI of up to 50 (30 is considered obese), knowing a participants BMI gave researchers a clearer picture of their risk of death. (Interestingly, for men with a BMI of up to 50, BMI provided no additional information on participants risk of death.) Why is waist circumference so key? While BMI says nothing about the distribution of fat in your body, waist circumference can tip you off to abdominal obesity—and researchers say greater levels of abdominal fat in particular have been linked to various diseases. The upshot? While BMI isnt completely worthless as a measure of health, other measurements are also important—and waist circumference is definitely one you should be aware of.
Posted on: Wed, 19 Mar 2014 17:57:38 +0000

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