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Overweight is defined as a body-mass index (BMI, the weight in kilograms divided by the square of the height in meters) at the 85th to less than the 95th percentile for age. Obesity is defined as a BMI at or above the 95th percentile. Data are from the Centers for Disease Control and Prevention (CDC) 2008 Pediatric and Pregnancy Nutrition Surveillance Systems (program-based surveillance systems that monitor the nutritional status of low-income infants, children, and women in federally funded maternal and child health programs). Data are based on BMI percentiles for children 2 years of age or older from CDC growth charts from 2000. The Ohio data are from the Ohio Department of Health’s Women, Infants, and Children division; the prevalence according to the Ohio Department of Health’s Bureau of Child and Family Health Services is higher (33.1%).

Source: NEJM