Washington: The "obesity paradox" that says, at age 65 and older, having an elevated BMI won`t shorten your lifespan, and may even extend it has been proved wrong in a new study.Researchers have found that as obese Americans grow older, in fact, their risk of death climbs.Ryan Masters, PhD, and Bruce Link, PhD, at Columbia University`s Mailman School of Public Health, in collaboration with Daniel Powers, PhD, at the University of Texas argue that past studies of longevity and obesity were biased due to limitations of the National Health Interview Survey, or NHIS, which provides information on obesity.The survey excludes individuals who are institutionalized, such as in a hospital or nursing home-a group largely made up of seniors. Consequently, the data is overrepresented by older respondents who are healthy, including the relatively healthy obese.What`s more, many obese individuals fail to make it to age 65-and thus do not live long enough to participate in studies of older populations.
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