Table 4.

Short and Long term precision of regional and total body %FM, FM, LM and BMC following repeated DXA scans in persons with SCI.

		Short-Term Precision Error			Long-Term Precision Error
Body Composition Variable	Regions	RMS-SD	RMS-CV%	Regions	RMS-SD	RMS-CV%
%FM	Arms n=23)	1.02	4.8	Arms (n=21)	0.88	4.4
Fat		0.14	5.6		0.13	6.0
Lean		0.20	3.3		0.28	4.6
BMC		0.011	2.4		0.012	2.7
Total Mass		0.43	4.5		0.38	4.1
%FM	Legs (n=23)	0.52	1.7	Legs (n=21)	0.74	2.4
Fat		0.50	2.6		0.20	2.6
Lean		0.40	2.7		0.44	3.0
BMC		0.94	1.0		0.01	1.3
Total Mass		0.53	2.3		0.53	2.3
%FM	Trunk (n=23)	0.83	3.2	Trunk (n=22)	0.77	2.8
Fat		0.50	3.8		0.4	3.0
Lean		0.48	1.9		0.6	2.7
BMC		0.034	3.1		0.044	4.4
Total Mass		0.6	1.5		0.78	2.0
%FM	Android (n=23)	0.97	2.4	Android (n=21)	1.37	4.6
Fat		0.135	4.2		0.156	6.7
Lean		0.10	2.4		0.134	3.6
BMC		0.0045	6.5		0.005	8.2
Total Mass		0.28	3.5		0.3	4.3
%FM	Gynoid (n=23)	1.24	3.8	Gynoid (n=21)	0.93	2.5
Fat		0.10	2.8		0.127	3.3
Lean		0.17	2.3		0.19	3.1
BMC		0.0070	2.8		0.07	3.4
Total Mass		0.48	5.8		0.294	3.0
%FM	TB (n=23)	0.55	2.3	TB (n=21)	0.53	2.0
Fat		0.44	2.2		0.038	1.7
Lean		0.55	1.2		0.9	1.8
BMC		0.05	1.8		0.04	1.4
Total Mass		0.26	0.3		1.16	1.6

Abbreviations: %FM= percent fat mass; FM= fat mass; LM= lean mass; BMC= bone mineral content; RMS-SD= root mean square standard deviation; RMS-CV%= root mean square coefficient of variation; BMC= bone mineral content; TB= total body