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) | |
