“Obesity and extreme obesity in childhood, which are more prevalent among minority and low-income families, have been associated with other cardiovascular risk factors, increased health care costs, and premature death. Obesity and extreme obesity during early childhood are likely to continue into adulthood. Understanding trends in extreme obesity is important because the prevalence of cardiovascular risk factors increases with severity of childhood obesity,” writes Liping Pan, M.D., M.P.H., of the Centers for Disease Control and Prevention, Atlanta, and colleagues. National trends in extreme obesity among young children living in low-income families have not been known.
As reported in a Research Letter, the authors analyzed data from the Pediatric Nutrition Surveillance System (PedNSS), which includes almost 50 percent of children eligible for federally funded maternal and child health and nutrition programs. The analysis for this study included 26.7 million children ages 2 through 4 years from 30 states and the District of Columbia that consistently reported data to PedNSS from 1998 through 2010. One routine clinic visit with demographic information and measured height and weight was randomly selected for each child. Obesity (body mass index [BMI] 95th percentile or greater for age and sex) and extreme obesity (BMI 120 percent or greater of the 95th percentile) were defined according to the 2000 CDC growth charts.
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