Discordance between grades for medial femoral osteophyte using the Osteoarthritis Research Society (OARS) and line drawing atlases. All scores graded by the three observers at the first reading are shown
| Medial femoral osteophyte: OARS atlas | Medial femoral osteophyte: line drawing atlas | ||||
|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | Total | |
| 0 | 117 | 9 | 3 | 129 | |
| 1 | 34 | 66 | 2 | 102 | |
| 2 | 2 | 39 | 12 | 53 | |
| 3 | 2 | 10 | 4 | 16 | |
| Total | 153 | 116 | 27 | 4 | 300 |