BMI is a 4-digit numeric variable providing a measure of body mass index.
9998.0 = Blank
9999.0 = NIU (Not in Universe)
BMI provides a measure of body mass index. Body mass index is a measure of obesity.
The formula for calculating BMI is based upon the individual's height (HEIGHT) and weight (WEIGHT). BMI = (weight in pounds * 703)/height in inches squared. For adults (age 20 and over), an individual with a BMI under 18.5 is considered underweight. A BMI between 18.5 and 24.9 is considered normal, BMI between 25.0 and 29.9 is considered overweight, and an individual with a BMI of 30 or more is considered obese.
The definitions of overweight and obesity differ for adults and children and teens. For a complete definition of BMI groups for adults see: Adult BMI. For a complete definition of BMI groups for children and teens see: Children and Teen BMI.
BMI was calculated with information gathered during the Eating and Health Module of the ATUS interview. Analyses that include BMI should use EHWT as the weight.
- Eating and Health module respondents.
- 2006-2008, 2014-2016