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European Radiology Experimental

Table 4 Interobserver and intraobserver reliability

From: A novel MRI index for paraspinal muscle fatty infiltration: reliability and relation to pain and disability in lumbar spinal stenosis: results from a multicentre study

Reliability

MFI

GCS

ICC (95% CI)

AC1 (95% CI)

Interobserver

0.79 (0.70, 0.85)

0.33 (0.27, 0.39)

Intraobserver

 Observer 1

0.91 (0.89, 0.92)

0.92 (0.89, 0.95)

 Observer 2

0.86 (0.74, 0.91)

0.64 (0.59, 0.70)

 Observer 3

0.91 (0.89, 0.93)

0.55 (0.49, 0.60)

  1. AC1 Gwet’s agreement coefficient, CI Confidence interval, GCS Goutallier classification system, ICC Intraclass correlation coefficient, MFI Muscle fat index
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