Interobserver reliability of cartilage abnormalities and osteophytes in patients with hand osteoarthritis
| Cartilage | Osteophytes | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean observed agreement | Mean κ (95% CI) | Mean prevalence of observed lesions (%) | Mean observed agreement | Mean κ (95% CI) | Mean prevalence of observed lesions (%) | |||||||||
| 0–3 | 0–3 | Yes/no | 0 | 1 | 2 | 3 | 0–3 | 0–3 | Yes/No | 0 | 1 | 2 | 3 | |
| Day 1 | 0.53 | 0.39 (0.31 to 0.45) | 0.28 (0.15 to 0.38) | 6.9 | 25.8 | 49.9 | 17.5 | 0.60 | 0.65 (0.62 to 0.68) | 0.58 (0.51 to 0.63) | 21.1 | 25.3 | 21.3 | 32.4 |
| Day 2 | 0.52 | 0.33 (0.27 to 0.38) | 0.13 (0.06 to 0.29) | 3.2 | 21.2 | 53.2 | 22.2 | 0.62 | 0.67 (0.64 to 0.69) | 0.55 (0.50 to 0.61) | 20.1 | 25.9 | 20.6 | 33.4 |