Abstract
PURPOSE: To compare 6 methods of estimating percent body fat (%BF) to dualenergy x-ray absorptiometry (DXA). METHODS: Fifty college students volunteered to have %BF measured on 1 day by a self-administered skinfold caliper (SA), 3-site digital body fat caliper (DBF), handheld bioelectrical impedance analysis (BIA) device, leg-to-leg BIA device, sum of 3 skinfolds using the Brozek equation (Sum3B), and body mass index %BF (BMI%F) using the Gallagher et al. %BF prediction equation. All %BF values were compared to DXA %BF. The correlation coefficient (r), constant error (CE), standard error of the estimate (SEE), and total error (TE) were determined by comparison to DXA. RESULTS:TABLE 1: Men's (n = 25) data.TABLE 2: Women's (n = 25) data.CONCLUSION: Leg-to-leg BIA and BMI%F for men were similar to DXA %BF. Estimations of %BF from other devices were valid, but not accurate compared to DXA %BF. Previous research indicates that DXA overpredicts %BF compared to hydrostatic weighing (HW). Since most of the %BF methods other than DXA are based on data from HW, a correction equation may be warranted for comparison of data.
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