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Change of K–L grade at follow-up in patellofemoral joint
| Grade change | Non-PF OA group (n = 83) |
PF OA group (n = 83) |
p-Value |
|---|---|---|---|
| No change | 40 (48.19%) | 22 (26.50%) | 0.003 |
| OA aggravation | 43 (51.81%) | 61 (73.49%) | 0.003 |
| Grade change 1 | 31 (37.35%) | 47 (56.63%) | 0.010 |
| Grade change ≥ 2 | 12 (14.46%) | 14 (16.87%) | 0.416 |
The p-values are of intergroup comparisons, with p < 0.05 indicating significance. K–L Kellgren–Lawrence, PF OA patellofemoral osteoarthritis, OA osteoarthritis
