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Abstract
The objective of this study is to describe overweight trends in a large, multiethnic, low-income population of preschool children by race/ethnicity and examine cohort changes in body mass index (BMI) distribution. Cross-sectional data were collected January 1 through March 31, every year, from 1989 to 2003. Subjects were children aged 2 to 4 years participating in the Special Supplemental Nutrition Program for Women, Infants, and Children in New York State. The prevalence of overweight (BMI ≥95th age- and sex-specific percentile of the 2000 Centers for Disease Control and Prevention growth charts) was calculated for each year. Least squares regression compared trends in prevalence by race/ethnicity. Changes in BMI distribution were assessed graphically. Overweight prevalence increased 33% (12% to 16%). Prevalence was highest for Hispanics and lowest for non-Hispanic whites. Rates of increase (0.28 percentage points per year) were the same for Hispanic, non-Hispanic black, and non-Hispanic white children. The BMI distribution shifted toward higher values for all children studied; for 3- and 4-year-old children, the difference increased as BMI increased, indicating that, in 2003, the heaviest children were considerably heavier than the heaviest children were in 1989.
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