Comparison of anthropometry to dual energy X-ray absorptiometry: a new prediction equation for women.
The purpose of this study was to assess the accuracy of three recommended anthropometric equations for women and then develop an updated prediction equation using dual energy x-ray absorptiometry (DXA). The percentage of body fat (%BF) by anthropometry was significantly correlated (r = .896-.929; p < .01) with DXA, but each equation underestimated %BF (3.2-5.6 %BF; p < .01). The following DXA criterion (DC) equation was created: %BF= -6.40665 + 0.41946(S3SF) - 0.00126(S3SF)2 + 0.12515(hip) + 0.06473 (age); (S3SF = sum of triceps, suprailiac, thigh; hip = circumference in cm; age = years). The predicted residual sum of squares (PRESS) R2 was high (0.86), and the PRESS standard error of estimate (SEE) was low (2.5 %BF) for our sample of 150 women. The DC equation was further crosschecked on a separate sample of women (n = 25) and again showed excellent agreement. The DC equation appears to be a more accurate estimation of %BF in women.
Ball
Stephen
S
Department of Nutritional Sciences at the University of Missouri, Columbia, 65211, USA. ballsd@missouri.edu
Swan
Pamela D
PD
DeSimone
Rosemarie
R
D015502:Absorptiometry, Photon; D000273:Adipose Tissue / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000886:Anthropometry; D001823:Body Composition / Q000502:physiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D011237:Predictive Value of Tests; D012044:Regression Analysis