NWS-10.4 Reduce the proportion of children and adolescents aged 2 to 19 years who are considered obese

National Data Source
National Health and Nutrition Examination Survey (NHANES); Centers for Disease Control and Prevention, National Center for Health Statistics (CDC/NCHS)
Changed Since the Healthy People 2020 Launch
Yes
Measure
percent 
Baseline (Year)
16.1 (2005-2008)
Target
14.5
Target-Setting Method
10 percent improvement
Numerator
Number of persons aged 2 to 19 years with a BMI at or above the sex-and age-specific 95th percentile from the CDC Growth Charts; United States
Denominator
Number of persons aged 2 to 19 years
Data Collection Frequency
Periodic
Comparable Healthy People 2010 Objective
Adapted from HP2010 objective
Leading Health Indicator
Nutrition, Physical Activity, and Obesity

Comments

Methodology Notes

The NHANES obtains measured weights in an examination gown and heights without shoes. BMI is calculated by dividing weight in kilograms by the square of height in meters. Children and adolescents with a BMI at or above the sex-and age-specific 95th percentile based on the 2000 CDC growth charts are considered obese.

Caveats and Limitations
Obesity is generally defined as excess body fat. However, since excess body fat is difficult to measure directly, obesity is often defined as excess body weight adjusted for height as measured by BMI or age and sex specific BMI percentiles for children and adolescents. BMI will be used as a proxy for obesity in children and adolescents until a better measure is developed. Clinical assessment and other markers should be considered when determining a child’s overall health and development. Among children, the marked BMI changes that occur with growth and development make it necessary to specify a high BMI relative to children of the same sex and age.
Trend Issues
Two-year data are used as a placeholder to provide the latest data available and will be replaced with four-year data when available. Two-year and four-year data are not comparable. Two-year estimates are generally less stable and reliable than four-year estimates.
Description of Changes Since the Healthy People 2020 Launch

The original baseline was revised from 16.1 to 16.2 due to a change in the methodology. Obesity was originally coded based on the calculated BMI variable which is rounded in NHANES. To be consistent with NHANES reports, instead of using the calculated BMI variable, BMI is now computed directly from the weight and height variables. The target was proportionately adjusted from 14.6 to 14.5 based on the origianl target setting method.

Changes Between HP2010 and HP2020
This objective differs from Healthy People 2010 objective 19-3c in that the age group tracked for obesity in children was expanded from 6–19 years to 2–19 years.

References and More Information

  1. CDC Growth Charts
    http://www.cdc.gov/growthcharts
  2. Troiano, R.P., and Flegal, K.M. Overweight children and adolescents: Description, epidemiology, and demographics. Pediatrics 101:497-504, 1998.
  3. U.S. Department of Health and Human Services. The Surgeon General’s Vision for Health and Fit Nation, Rockville, MD: U.S. Department of Health and Human Services, Office of the Surgeon General, January 2010.