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Rates of chronic conditions in children and youth have increased significantly during the past 30 years. Researchers used data from the National Longitudinal Survey of Youth-Child Cohort to prospectively examine changes in incidence, persistence, and remission rates of common chronic conditions.
Three cohorts of children aged 2 through 8 years at enrollment were followed for 6 years: 1988 to 1994 (2337 children), 1994 to 2000 (1759 children), and 2000 to 2006 (905 children). Mothers were interviewed about chronic health conditions in their children that limited activities or school attendance or required medicine, special equipment, or specialized health services for at least 12 months. Chronic conditions were categorized into four groups: o…