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Frequency of cartilage lesions and osteophytes of the trochlea
| Trochlea groove | Trochlea medial margin | Trochlea lateral margin | |||||
| N | % | n | % | n | % | ||
| ICRS grade | 0 | 600 | 50.0 | 530 | 44.2 | 524 | 43.7 |
| 1 | 154 | 12.8 | 173 | 14.4 | 170 | 14.2 | |
| 2 | 257 | 21.4 | 247 | 20.6 | 243 | 20.3 | |
| 3 | 157 | 13.1 | 180 | 15.0 | 193 | 16.1 | |
| 4 | 19 | 1.6 | 69 | 5.8 | 69 | 5.8 | |
| Osteophytes | 5 | 12 | 1.0 | ||||
