Adult obesity rates in the U.S. remaining unchanged.

FOX News Radio's Lisa Lacerra reports:

The Centers for Disease Control finding at least 30% of adults in 13 states are considered to be obese.

The highest rates continue to be in the South and Midwest. Topping the list: Louisiana and Mississippi. In both states, nearly 35% of adults were obese. Colorado, the skinniest state according to the survey, with a 21% rate of obesity.

The Centers for Disease Control and Prevention conducts the telephone survey every year. They ask respondents their height and weight. The CDC defines obesity using the body mass index, the weight to height ratio, anyone with a BMI of 30 or higher is considered to be obese.

Lisa Lacerra, FOX News Radio.