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Table 1 Intra-rater reliability (ICC; CI) according to lumbar level, quartile, and side

From: Reliability of quantifying the spatial distribution of fatty infiltration in lumbar paravertebral muscles using a new segmentation method for T1-weighted MRI

  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
  1. 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 (Qmean)