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Pfirrmann grading.
| Pre | FFU of group A (n) | FFU of group B (n) | ||||||
|---|---|---|---|---|---|---|---|---|
| 2 | 3 | 4 | 5 | 2 | 3 | 4 | 5 | |
| 2 | 3/11∗ | 0/2∗ | 0/14∗ | 1/1∗ | 1/0∗ | |||
| 3 | 5/12∗ | 7/1∗ | 4/0∗ | 1/0∗ | 5/17∗ | 7/3∗ | 5/0∗ | |
| 4 | 1/0∗ | 4/1∗ | 3/0∗ | 2/0∗ | 6/0∗ | 7/0∗ | ||
Pre: preoperative; FFU: final follow-up. ∗Upper adjacent segment data.
