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NWS-10.3 Data Details

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NWS-10.3 Reduce the proportion of adolescents aged 12 to 19 years who are considered obese

About the Data

Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.

Data Source: 
National Health and Nutrition Examination Survey
Changed Since the Healthy People 2020 Launch: 
Yes
Measure: 
percent
Baseline (Year): 
17.9 (2005–08)
Target: 
16.1
Target-Setting Method: 
10 percent improvement
Numerator: 

Number of persons aged 12 to 19 years with a body mass index (BMI) at or above the sex-and age-specific 95th percentile from the CDC Growth Charts; United States

Denominator: 

Number of persons aged 12 to 19 years

Comparable Healthy People 2010 Objective: 
Retained from HP2010 objective
Data Collection Frequency: 
Periodic
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.

Revision History

Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.

Description of Changes Since the Healthy People 2020 Launch: 
In 2013, the method for computing the confidence intervals was revised from the standard Wald method to the Wald method on the log scale.

References

Additional resources about the objective

  1. CDC Growth Charts

  2. Troiano RP and Flegal KM. 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.