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Could Being a Little Overweight Help You Live Longer?
Date:1/2/2013

By Steven Reinberg
HealthDay Reporter

TUESDAY, Jan. 1 (HealthDay News) -- A new international analysis reveals a surprising pattern: while obesity increases the risk of dying early, being slightly overweight reduces it.

These studies included almost 3 million adults from around the world, yet the results were remarkably consistent, the authors of the analysis noted.

"For people with a medical condition, survival is slightly better for people who are slightly heavier," said study author Katherine Flegal, a senior research scientist at the U.S. Centers for Disease Control and Prevention's National Center for Health Statistics.

Several factors may account for this finding, Flegal added.

"Maybe heavier people present to the doctor earlier, or get screened more often," she said. "Heavier people may be more likely to be treated according to guidelines, or fat itself may be cardioprotective, or someone who is heavier might be more resilient and better able to stand a shock to their system."

The report was published Jan. 2 in the Journal of the American Medical Association.

For the study, Flegal's team collected data on more than 2.88 million people included in 97 studies. These studies were done in the United States, Canada, Europe, Australia, China, Taiwan, Japan, Brazil, Israel, India and Mexico. The researchers looked at the participants' body mass index, or BMI, which is a measurement of body fat that takes into account a person's height and weight.

Pooling the data from all the studies, the researchers found that compared with normal weight people, overweight people had a 6 percent lower risk of death. Obese people, however, had an 18 percent higher risk of death.

For those who were the least obese, the risk of death was 5 percent lower than for normal weight people, but for those who were the most obese the risk of death was 29 percent higher, the findings revealed.

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