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Wednesday, August 25, 2010

Study: Belly bulge can be deadly for older adults

Still not better than the BMI.
If your pants are feeling a bit tight around the waistline, take note: Belly bulge can be deadly for older adults, even those who aren't overweight or obese by other measures.

One of the largest studies to examine the dangers of abdominal fat suggests men and women with the biggest waistlines have twice the risk of dying over a decade compared to those with the smallest tummies.

Surprisingly, bigger waists carry a greater risk of death even for people whose weight is "normal" by the body mass index, or BMI, a standard measure based on weight and height.

"Even if you haven't had a noticeable weight gain, if you notice your waist size increasing that's an important sign," said lead author Eric Jacobs of the American Cancer Society, which funded the study. "It's time to eat better and start exercising more."

Other research has linked waist size to dementia, heart disease, asthma and breast cancer.

Bulging bellies are a problem for most Americans older than 50. It's estimated that more than half of older men and more than 70 percent of older women have bigger waistlines than recommended. And it's a growing problem: Average waistlines have expanded by about an inch per decade since the 1960s.

To check your girth, wrap a tape measure around your waist at the navel. No fair sucking in your bulge. Men should have a waist circumference no larger than 40 inches. For women, the limit is 35 inches.

The new study, appearing in Monday's Archives of Internal Medicine, is the first to analyze waist size and deaths for people in three BMI categories: normal, overweight and obese. In all three groups, waist size was linked to higher risk.
About 2 percent of people in the study had normal BMI numbers but larger than recommended waists. Jacobs said the risk increased progressively with increasing waist size, even at waist sizes well below what might be considered too large.
Here is why.

BMI is related to all cause mortality AND you cannot cheat it.

The inch and pound, which form the basis of the BMI calculation cannot be fudged like taking your waist circumference can.

You can lie about anything, but you cannot fudge the inch or pound.
The researchers crunched numbers on waist circumference, height and weight to draw conclusions about who was more likely to die. Study participants measured their own waists, so some honest mistakes and wishful fudging could have been included, the authors acknowledged.
See?

BTW, this puts their data into suspicion. Who knows how much fudging went on? No way to tell.

Further, people are more likely to weigh themselves than tape measure their girth.

Plus, using the BMI provides a road map for weight loss - something waist circumference cannot.

For the alleged 2% that fell through the cracks, well, that is a small price, if any.

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