Intraobserver and inter-reader reliability of cartilage lesions in hand osteoarthritis using a web-based reading exercise
| Intraobserver | Interobserver | ||||
|---|---|---|---|---|---|
| Score | Men prevalence of observed lesions (%) | Range of observed agreement | Range of κ (95% CI) (Yes/No) | Mean observed agreement | Mean κ (95% CI) (Yes/No) |
| Grade 0 | 15.8 | 0.87–1 | 0.27–1 (−0.10–0.78) to (1–1) | 0.82 | 0.47 0.34 to 0.56 |
| Grade 1 | 36.4 | 0.60–1 | 0.21–1 (−0.19–0.59) to (1–1) | 0.61 | 0.22 0.16 to 0.27 |
| Grade 2 | 39.4 | 0.70–0.92 | 0.18–0.81 (−0.18–0.54) to (0.21–1) | 0.66 | 0.3 0.24 to 0.36 |
| Grade 3 | 27 | 0.83–1 | 0.62–1 (0.29–0.87) to (1–1) | 0.87 | 0.68 0.58 to 0.75 |