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July 17, 2008 -- At least a quarter of U.S. adults are obese, and that's just the ones who admit it, according to new adult obesity statistics from the CDC.
Nationally, 25.6% of adults are obese, up 1.7 percentage points from 2005. That's not just a few extra pounds; it's a BMI of 30 or more. BMI (body mass index) relates height to weight.
Mississippi has the highest percentage of obese adults -- 32% -- followed by Alabama, Tennessee, Louisiana, and Arkansas. Colorado cuts the leanest figure, with 18.7% of its adults in the obese range. Colorado has had the lowest adult obesity prevalence since 1990.
Still, no state -- not even Colorado -- met the federal government's goal of trimming that figure to no more than 15% by 2010.
"None of the states met that goal of obesity prevalence of 15% and it looks like we are continuing to head in the wrong direction," CDC epidemiologist Celeste Philip, MD tells WebMD.
The CDC's web site puts America's obesity boom in living color, with a map showing states turning from blue (low percentage of obese adults) to dark red (high percentage) since 1989.
Here's how each state -- plus Washington, D.C. -- ranks in adult obesity prevalence, along with the percentage of obese adults. States with the same prevalence are listed together.
The data, published in the CDC's Morbidity and Mortality Weekly Report, came from telephone interviews with 404,300 U.S. adults aged 18 and older in 2007. Here's the catch: They may have misreported their self-reported height and weight.
Men tend to overestimate their height and women tend to underestimate their weight, so America's true obesity statistics may actually be higher, Philips says. She says that the last time that the CDC measured a nationally representative sample of U.S. adults, instead of relying on self-reported weight and height, 34.3% were obese.