Comparison of body fat estimates using 3D digital laser scans, direct manual anthropometry, and DXA in men.
OBJECTIVE
The purpose of this study was to assess the feasibility of utilizing three dimensional whole body laser surface scanning (3DS) to obtain specific anthropometric measurements to estimate percent body fat (BF).


METHODS
Percent BF estimates from 37 male volunteers, of age 18-62 yr, were determined by inputting manual anthropometric (MA) and 3DS anthropometric measurements into the current Army BF prediction equation for males. The results were compared with each other and to BF values from Dual Energy X-ray Absorptiometry (DXA), employed as a reference method.


RESULTS
Mean percent BF estimates (+/-SD) derived from MA, 3DS and from DXA were 18.4(+/-3.8), 18.8(+/-3.9), and 18.9(+/-4.7), respectively. Analysis of Variance tests revealed no statistical difference between the mean values. Correlation analysis comparing MA and 3DS derived percent BF estimates to each other and to those measured by DXA revealed moderate to strong Pearson correlation coefficients (r), small to moderate standard errors of the estimate (SEE), and were statistically significant (p < 0.05).


CONCLUSIONS
Correlation coefficients and SEE results for this sample were: (1) DXA vs 3DS; r = 0.74, SEE = 3.2, (2) MA vs DXA; r = 0.82, SEE = 2.8, and (3) MA vs 3DS; r = 0.96, SEE = 1.0. Lin's concordance analysis, including Bland-Altman limits of agreement (LOA), revealed statistically significant measurement agreement among the three measurement modalities (p < 0.05). The application of 3DS scanning to estimate percent BF from commonly used anthropometric measurements are in close agreement with BF estimates derived from analogous MA measurements and from DXA scanning.
Garlie
Todd N
TN
Warfighter Science, Technology and Applied Research United States Army Natick Soldier Research Development and Engineering Center, Natick, Massachusetts 01760, USA. nati-amsrd-nsc-ad-b@conus.army.mil
Obusek
John P
JP
Corner
Brian D
BD
Zambraski
Edward J
EJ
D015502:Absorptiometry, Photon / Q000379:methods*; D000273:Adipose Tissue; D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D000886:Anthropometry / Q000379:methods*; D001823:Body Composition; D005240:Feasibility Studies; D006801:Humans; D007834:Lasers; D008297:Male; D008875:Middle Aged; D051598:Whole Body Imaging / Q000379:methods*; D055815:Young Adult