Intraobserver and interobserver agreement and reliability of the Pfirrmann grading
| Observers | Agreement(%) | κ Value | ||||
|---|---|---|---|---|---|---|
| Grade I | Grade II | Grade III | Grade IV | Grade V | ||
| Intraobserver | ||||||
| A1-A2 | 76.7 | 89.0 | 83.1 | 71.6 | 87.5 | 0.795 |
| B1-B2 | 90.7 | 91.2 | 79.8 | 51.0 | 87.5 | 0.822 |
| Interobserver | ||||||
| A1-B1 | 72.1 | 83.8 | 75.3 | 51.0 | 87.5 | 0.675 |
| A1-B2 | 74.4 | 89.7 | 75.3 | 61.2 | 87.5 | 0.730 |
| A2-B1 | 86.0 | 86.8 | 80.9 | 53.1 | 87.5 | 0.722 |
| A2-B2 | 90.7 | 94.1 | 83.1 | 63.3 | 87.5 | 0.812 |