Leading Health Indicators are a subset of Healthy People 2020 objectives selected to communicate high-priority health issues.
Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
The NHANES obtains measured weights in examination gowns and heights without shoes. BMI is calculated by dividing weight in kilograms by the square of height in meters.
In 1997, a Consultation on Obesity convened by the World Health Organization recommended standardizing the classification of overweight and obesity. Obesity was defined as a BMI of 30.0 or greater. Further classification of obesity was made as follows: 30.0-34.9 was defined as Class I obesity, 35.0-39.9 as Class II, and 40.0 or greater as Class III. The Expert Panel on the Identification, Evaluation, and Treatment of Overweight and Obesity in Adults, convened by NIH in 1998 adopted general concepts of the World Health Organization classification system and it has now been endorsed by more than 50 professional medical societies, consumer groups, and government agencies. For this objective, therefore, a BMI cut point of 30.0 was chosen for adults aged 20 years and older.
Pregnant women are excluded from the numerator and denominator.
This Indicator uses Age-Adjustment Groups for four-year data:
This Indicator uses Age-Adjustment Groups for two-year data:
Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.
In 2012, the original baseline was revised from 34.0 to 33.9 percent due to a change in the methodology. Obesity was originally coded based on the calculated BMI variable which is rounded in NHANES and had an error in the 2007-08 dataset. 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 30.6 to 30.5 percent based on the original target setting method.
Additional resources about the objective.
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