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Table 3 Prevalence of positive ratings for the MRI changes assessed

From: Spondyloarthritis-related and degenerative MRI changes in the axial skeleton - an inter- and intra-observer agreement study

  Name of the MRI changes Reader A, first reading Reader B, first Reading Reader C, first reading Reader A2, second reading Reader B2, second reading
Spine Type of signal change 114 147 88 118 154
  Signal change in the corner1 38 57 13 39 47
  Location of signal change1 114 147 88 118 154
  Size of signal change1 114 147 88 118 154
Total size of BMO lesions in DVU 36 32 11 12 31
Total size of FMD lesions in DVU 38 39 32 14 41
Total size of mixed lesions in DVU 9 25 10 4 27
Erosions 3 16 11 3 17
Erosion of the corner 1 3 0 0 0
Syndesmophytes or vertebral fusion 5 8 3 7 6
BMO at apophyseal joints 8 4 5 10 5
BMO at costovertebral joints 1 4 1 1 4
FMD at apophyseal joints 4 0 1 1 3
Soft tissue oedema 1 0 0 0 0
Disc degeneration 160 149 109 150 153
Disc contour 122 101 99 111 105
Herniation in the vertebral endplate 23 19 6 21 27
Scheuermann’s changes 12 5 15 9 10
SIJ BMO 71 77 58 70 85
  Intensity of BMO1 15 6 0 13 7
  Depth of BMO1 27 21 24 27 30
FMD 59 84 60 62 80
  Depth of FMD1 36 44 48 33 42
Erosions 32 39 9 35 43
Subchondral sclerosis 19 21 9 15 21
  Ankylosis 4 11 8 4 8
  1. The numbers in the table refer to ratings > 0 (not normal) for each of the MRI changes. Only MRI changes with at least 5 positive ratings pr. reading were included in the kappa analyses. BMO, Bone marrow oedema; FMD, Fatty marrow deposition. 1Only observations where the reader on both the readings agreed on the presence of a signal change, BMO or FMD, respectively, were kept in the analysis.