Table 3.

Bias and limits of agreement of DXA compared to the 4 component model for baseline body composition and its change (n = 51)

	Fat-free mass					Fat mass
	Bias (kg)	LOA (kg)	p	r	p	Bias (kg)	LOA (kg)	p	r	p
All	−1.00	4.20	<0.0001	−0.32	<0.0001	0.86	4.19	<0.0001	0.17	0.037
Boys	−0.67	2.96	0.001	−0.24	0.07	0.69	3.07	0.001	−0.19	0.16
Girls	−1.20	4.75	<0.0001	−0.43	<0.0001	0.96	4.74	<0.0001	0.30	0.003
	Change in fat-free mass					Change in fat mass
	Bias (kg)	LOA (kg)	p	r	p	Bias (kg)	LOA (kg)	p	r	p
All	−0.02	3.16	0.9	−0.18	0.2	0.04	3.00	0.8	−0.06	0.6

LOA – limits of agreement, calculated as twice the standard deviation of the bias. 18 boys, 33 girls.