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Measures > Measure Information
Height, Weight, and Body Mass Index (BMI, calculated)
General Information
Measure Name: Height, Weight, and Body Mass Index (BMI, calculated)
Measure Type: Index
Construct: Anthropometry
Primary Content Area: Obesity
Secondary Content Area: Anthropometrics
Brief Description: BMI = weight / height^2 (kg/m^2)
BMI is a useful measure of adiposity because of its simplicity and that it is derived from data generally collected in the clinic-- height and weight. BMI, sex, and age explain approximately 50% to 60% of the variance in percent body fat as measured by dual energy x-ray absorptiometry (DXA). BMI is an indirect measure of adiposity rather than fat-free mass (FFM) or fat mass (FM). Even using it as an index of percentage body fat, from which one could subsequently calculate fat-free mass (FFM) from weight, only about 50% of the variance in % body fat measured by dual energy x-ray absorptiometry (DXA) or other measures can be explained by BMI, gender, and age. While touted for its simplicity and availability, BMI does have the limitations of 1) overestimating body fat in athletes and others who have a muscular build, and 2) underestimating body fat in older persons and others who have lost muscle.

Bergman R, Stefanovski D, Buchanan T, et al. A better index of body adiposity. Obesity (Silver Spring) 2011;19:1083-1089.
Keywords: adiposity
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Mode of Administration: Who Administered: Researcher
How Administered: Other
Other/Uncategorized/To-be-decided: Anthropometric
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(Last Updated: 3/16/2018 2:22:12 PM by Paul MacLean)

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