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

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

	Method	% fat ( $\bar{x}$ ± SD)	Slope	Intercept	CE	r	SEE	TE	Limits
	3C	16.3 ± 4.7
Field	MC	13.6 ± 4.1	0.71	6.71	2.69*	0.62	3.78	4.7^†	5.00, -10.38
	NAF	13.4 ± 4.9	0.55	8.86	2.86*	0.57	3.96	5.2^†	5.87, -11.60
	A	14.3 ± 4.4	0.60	7.68	1.96	0.57	3.97	4.7^†	6.44, -10.36
	Friedl	14.4 ± 4.7	0.57	8.01	1.86	0.57	3.94	4.7^†	6.69, -10.42
	NIR	14.3 ± 4.6	0.50	9.16	1.98	0.49	4.20	5.1^†	7.30, -11.27
	BIA-AK	17.1 ± 4.5	0.95	0.05	-0.78	0.91	2.00	2.1	4.65, -3.09
	BIA-Lohman	16.0 ± 4.0	1.07	-0.74	0.33	0.90	2.14	2.1	3.83, -4.48
Lab	BP	16.3 ± 5.5	0.75	4.12	0.04	0.86	2.42	2.7	5.35, -5.43
	HW	15.8 ± 4.7	0.87	2.51	0.53	0.86	2.44	2.5	4.31, -5.36

* Represents significance (p < 0.0055), ^† Represents an unacceptable TE (TE > 4.0% BF)
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))
% Fat = (body mass - fat free mass)/body mass
3C %fat [3] = [(2.118/body density) - [0.78 × (total body water in L/body mass in kg)] - 1.354] × 100
MC – Marine Corps [18], %fat = (0.740 × abdominal circumference in cm) - (1.249 × neck circumference in cm) + 0.985
NAF – Navy and Air Force [21], % fat = [(4.95/body density) - 4.5] × 100
NAF [20], body density = [0.155 × log (height in cm)] - [0.191 × log (abdominal - neck circumference in cm)] + 1.032
Army [19], %fat = [76.5 × log (abdominal - neck circumference in cm)] - [68.7 × log (height in cm)] + 43.7
Friedl [8], %fat = [0.771 × (abdominal - neck circumference in cm)] - (0.132 × height in cm) + 4.29
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 [12], fat free mass (kg) = [0.485 × (height in cm²/resistance in Ω)] + [0.338 × (body mass in kg)] + 5.32
BP = BOD POD^® [4], %fat = [(4.57/body density) - 4.142] × 100
HW = Hydrostatic weighing [4], %fat = [(4.57/body density) - 4.142] × 100