Table 1.

Intra-rater reliability (ICC; CI) according to lumbar level, quartile, and side

	L1	L2	L3	L4	L5	L1-5
Q1	0.84	0.85	0.86	0.89	0.94	0.93
	0.71–0.91	0.74–0.92	0.76–0.93	0.81–0.94	0.88–0.97	0.91–0.95
Q2	0.72	0.87	0.89	0.84	0.92	0.89
	0.38–0.86	0.76–0.93	0.81–0.94	0.72–0.91	0.85–0.97	0.86–0.92
Q3	0.71	0.70	0.81	0.76	0.88	0.83
	0.46–0.85	(0.51–0.83)	0.67–0.90	0.59–0.86	0.78–0.93	0.78–0.87
Q4	0.75	0.67	0.87	0.84	0.83	0.81
	0.53–0.87	0.45–0.81	0.75–0.93	0.72–0.91	0.70–0.91	0.76–0.85
Qmean	0.61	0.70	0.87	0.85	0.91	0.85
	0.37–0.78	0.50–0.83	0.77–0.93	0.74–0.92	0.84–0.95	0.81–0.89
Right	0.82	0.87	0.86	0.88	0.95	0.91
	0.74–0.87	0.81–0.91	0.79–0.90	0.83–0.92	0.93–0.97	0.90–0.93
Left	0.77	0.69	0.87	0.81	0.88	0.85
	0.59–0.87	0.54–0.80	0.81–0.91	0.73–0.87	0.83–0.92	0.83–0.88

Lumbar level (L1,L2,L3,L4,L5) and all lumbar levels combined (L1-5); Quartiles (Q1,Q2,Q3,Q4) where 1 is most medial, and 4 most lateral, and average of all 4 (Q_mean)