Percent body fat estimations in college women using field and laboratory methods: a three-compartment model approach

Table 2 Validation of methods of predicting %fat compared to 3C

	Method	% fat ( $\bar{x}$ ± SD)	Slope	Intercept	CE	r	SEE	TE	Limits
	3C	26.3 ± 4.6
Lab	HW	24.8 ± 5.6	0.78	6.98	1.5*	0.94	1.6	2.4	5.3, -2.3
	BP	26.7 ± 5.5	0.77	5.91	-0.3	0.91	1.9	2.3	4.1, -4.8
Field	NIR	25.4 ± 3.7	1.12	0.47	0.9	0.82	2.7	2.7	6.1, -4.2
	BIA-AK	26.4 ± 4.4	0.96	0.84	-0.1	0.92	1.9	1.8	3.5, -3.7
	BIA-Lohman	25.4 ± 3.4	1.26	-5.58	0.9	0.93	1.8	2.1	4.7, -2.8
	SF3JPW	23.7 ± 3.9	0.93	4.24	2.6*	0.80	2.8	3.8	8.1, -2.8
	SF3WB	25.5 ± 2.5	1.62	-15.05	0.8	0.88	2.2	2.8	6.0, -4.5

* Represents significance at (p ≤ 0.007)
CE = Constant error, TE = Total error, SEE = Standard error of estimate, r = Pearson product-moment correlation coefficient, Limits = 95% limits of agreement (CE ± 1.96 SD of residual scores (predicted-actual))
HW = Hydrostatic weighing
BP = BOD POD^®
NIR = Near-infrared interactance (Futrex 6100/XL)
BIA = Bioelectrical impedance analysis (RJL Systems Quantum II)
AK = Computer-generated from BodyGram™ Version 1.31 (Akern Bioresearch)
Lohman [41] - FFM (kg) = 0.476 (HT²/R) + 0.295 (BW) + 5.49
SF3JPW [45] - BD = 1.0994921 - 0.0009929 × X1 + 0.0000023 × X1² - 0.0001392 × age
SF3WB [22] - BD = 1.06234 - 0.00068 × subscapular - 0.00039 × triceps - 0.00025 × thigh
FFM = Fat-free mass
HT = Height (cm)
BW = Body weight (kg)
R = BIA resistance (Ω)
% Fat = (BW - FFM)/BW
X1 = Sum of skinfolds (triceps, suprailium, thigh)
BD = Body density
%fat [6] = (4.57/BD - 4.142) × 100.

ISSN: 1550-2783