Cross-sectional interreader reliability of the OMERACT hand OA MRI score.
| AvmICC (95% CI) | PEA | PCA | |
|---|---|---|---|
| Baseline (2008–09) | |||
| Synovitis | 0.50 (0.05, 0.78) | 18.8 | 68.8 |
| Erosive damage | 0.81 (0.32, 0.93) | 31.3 | 59.4 |
| Cysts | 0.51 (0.02, 0.78) | 30.6 | 67.5 |
| Osteophytes | 0.74 (0.19, 0.91) | 10.0 | 44.4 |
| Cartilage space loss | 0.93 (0.72, 0.98) | 20.6 | 55.6 |
| Malalignment | 0.58 (0.10, 0.82) | 50.0 | 76.9 |
| Bone marrow lesions | 0.87 (0.72, 0.94) | 49.4 | 78.1 |
| Followup (2013) | |||
| Synovitis | 0.57 (0.09, 0.82) | 14.4 | 55.0 |
| Erosive damage | 0.84 (0.33, 0.95) | 22.5 | 51.9 |
| Cysts | 0.53 (0.02, 0.80) | 25.6 | 51.9 |
| Osteophytes | 0.76 (0.13, 0.92) | 8.1 | 43.8 |
| Cartilage space loss | 0.92 (0.71, 0.97) | 16.3 | 60.0 |
| Malalignment | 0.51 (0.00, 0.78) | 40.0 | 69.4 |
| Bone marrow lesions | 0.91 (0.79, 0.97) | 40.6 | 74.4 |
OA: osteoarthritis; MRI: magnetic resonance imaging; AvmICC: average measure intraclass correlation coefficients; PEA: percentage exact agreement (joint level); PCA: percentage close agreement (joint level).