A new study from the Center for Disease Control and Prevention shows that between 1998 and 2008, the percentage of adolescents with pre-diabetes or diabetes increased from 9% to 23%.
Pre-diabetes is a condition where blood sugar levels are abnormally high, but not high enough to be classified as diabetes.
Researchers took information from 3, 383 teens who participated in a government survey. They were interviewed and given a physical exam. One third of the participants were found to be overweight or obese.