Table 1.

Intraclass correlations (ICC) of muscle volume and Muscle Fatty Infiltrate (MFI) for rectus abdominis (RA), psoas (PS), multifidus (M), erector spinae (ES) and M and ES combined (MES). Upper and lower bound confidence intervals (CI) are shown. Data from the first evaluation are shown for RA, PS and ES and M data from the second evaluation.

		Muscle volume			MFI
		ICC	CI		ICC	CI
			lower	upper		lower	upper
RA	left	0.77	0.01	0.94	0.90	0.12	0.98
	right	0.88	-0.01	0.98	0.84	-0.16	0.97
PS	left	0.94	0.78	0.99	0.95	0.79	0.99
	right	0.92	0.15	0.98	0.91	0.67	0.98
M	left	0.82	0.27	0.96	0.83	0.29	0.96
	right	0.59	-0.63	0.90	0.88	0.50	0.97
ES	left	0.96	0.84	0.99	0.96	0.85	0.99
	right	0.93	0.72	0.98	0.96	0.85	0.99
MES	left	0.905	0.512	0.978	0.784	0.120	0.947
	right	0.921	0.327	0.984	0.819	0.162	0.957