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Table 2 Inter-rater reliability estimates

From: Degenerative findings on MRI of the cervical spine: an inter- and intra-rater reliability study

MRI finding n Reader pair Observed agreement (%) Agreement by chance (%) Kappa (95% CI)
Kyphosisa 50 A1B1 92.0 56.4 0.82 (0.75; 0.89)
49 A1C1 89.8 53.6 0.78 (0.71; 0.85)
49 B1C1 89.8 52.8 0.78 (0.71; 0.86)
49 A1B1C1 85.7 31.2 0.79 (0.73; 0.85)
Disc heightb 150 A1B1 92.0 52.8 0.83 (0.74; 0.92)
200 A1C1 80.0 52.8 0.58 (0.46; 0.69)
150 B1C1 77.3 50.0 0.55 (0.42; 0.68)
150 A1B1C1 74.7 26.4 0.65 (0.57; 0.74)
Disc contourb 177 A1B1 76.8 43.4 0.59 (0.49; 0.70)
177 A1C1 79.7 43.3 0.64 (0.53; 0.74)
200 B1C1 80.0 47.6 0.62 (0.52; 0.72)
177 A1B1C1 68.4 21.7 0.61 (0.54; 0.69)
Spinal canal stenosisb 100 A1B1 97.0 76.0 0.88 (0.68; 1.00)
100 A1C1 91.0 73.5 0.66 (0.47; 0.83)
100 B1C1 92.0 74.3 0.69 (0.48; 0.86)
100 A1B1C1 90.0 63.0 0.74 (0.57; 0.86)
Vertebral endplate signal change Too low prevalences (i.e. ≤ 10%)
Uncovertebral osteoarthritisc 222 A1B1 90.1 68.0 0.69 (0.57; 0.81)
237 A1C1 89.0 68.6 0.65 (0.53; 0.77)
230 B1C1 87.4 70.9 0.57 (0.43; 0.71)
222 A1B1C1 83.3 53.0 0.65 (0.51; 0.76)
Zygapophyseal osteoarthritisc 270 A1B1 94.8 74.2 0.80 (0.70; 0.90)
144 A1C1 87.5 74.9 0.50 (0.31; 0.70)
184 B1C1 85.9 78.9 0.33 (0.13; 0.53)
135 A1B1C1 83.0 61.0 0.56 (0.43; 0.70)
Neural foraminal stenosisc 268 A1B1 90.7 64.1 0.74 (0.65; 0.84)
287 A1C1 90.2 64.2 0.73 (0.63; 0.82)
275 B1C1 87.6 65.8 0.64 (0.53; 0.75)
268 A1B1C1 84.0 46.0 0.73 (0.63; 0.82)
  1. an refers to the number of MRIs assessed
  2. bn refers to the number of disc levels assessed
  3. cn refers to the number of anatomical sites assessed (by pooling right and left hand side)