Table 5.

Comparison of the results of FFM_{DXA and} FFM_BIA for different %BF subgroups^a

Female: BF%DXA	<20 % (n = 20)	20 % - 30 % (n = 80)	30 %-40 % (n = 94)	>40 % (n = 61)	Total (n = 257)
FFMDXA (kg)	41.8 ± 3.8	41.8 ± 5.2	38.4 ± 4.7	40.9 ± 6.9	40.3 ± 5.6
	(35, 48)	(29, 52)	(29, 51)	(30, 58)	(29, 58)
FFMBIA (kg)	39.2 ± 3.6	40.3 ± 4.7	38.9 ± 4.4	42.9 ± 6.7	40.3 ± 5.2
	(32, 45)	(29, 51)	(28, 51)	(31, 60)	(28, 59)
Bias ± SDb (kg)	−2.6 ± 1.7	−1.5 ± 2.8	0.5 ± 2.7	2.0 ± 2.9	0.0 ± 3.0
r,c	0.90	0.91	0.89	0.94	0.87
P ,d	0.04*	0.06	0.43	0.11	0.92
Slope,e	0.86	0.83	0.79	0.89	0.79
Intercept,e	3.17	5.34	9.77	6.70	8.41
Male: BF%DXA	<10 % (n = 46)	10 % - 20 % (n = 96)	20 % - 30 % (n = 104)	>30 % (n = 51)	Total (n = 297)
FFMDXA(kg)	60.9 ± 5.2	58.6 ± 7.0	58.2 ± 7.9	57.9 ± 7.7	50.1 ± 11.4
	(47, 71)	(33, 76)	(46, 86)	(46, 77)	(33, 86)
FFMBIA(kg)	58.6 ± 3.8	58.1 ± 5.3	58.6 ± 6.7	60.0 ± 7.4	50.0 ± 10.9
	(52, 67)	(39, 74)	(48, 79)	(47, 79)	(40, 79.2)
Bias ± SDb(kg)	−2.3 ± 2.5	−0.5 ± 3.2	0.4 ± 3.1	2.1 ± 3.2	0.0 ± 3.2
r,c	0.89	0.90	0.93	0.91	0.89
P ,d	0.02*	0.59	0.68	0.16	0.97
Slopee	0.65	0.68	0.79	0.87	0.70
Intercepte	19.13	18.52	12.71	9.60	17.41

^aAll values are mean ± SD; minimum and maximum in parentheses

^bThe biases and standard deviations between FFM_DXA and FFM_BIA indifferent subgroups

^cThe correlation coefficients of FFM_DXA and FFM_BIA in different subgroups

^dThe results of paired t-tests between FFM_DXA and FFM_BIA indifferent subgroups

^eThe slopes and intercepts of the regression model of FFM_DXA and FFM_BIA indifferent subgroups

*Denotes significantly different at the .05 level