Table 4.
Assessment of the cartilage lesion grade at second-look operation compared with the initial operation
| Group 1 (n = 59) |
Group 2 (n = 33) |
P value c | |
|---|---|---|---|
| Medial compartment a | 0.732 | ||
| Stage A (No regeneration) | 18 (30.5%) | 8 (24.2%) | |
| Stage B (Partial coverage) | 32 (54.2%) | 18 (54.5%) | |
| Stage C (Total coverage) | 9 (15.3%) | 7 (21.2%) | |
| Patellofemoral compartment b | 0.136 | ||
| Not progressed | 49 (83.1%) | 23 (69.7%) | |
| Progressed | 10 (16.9%) | 10 (30.3%) |
a Based on macroscopic staging system of cartilage regeneration according to Koshino et al.
b Based on International Cartilage Repair Society (ICRS) grading system
c Statistical significance was evaluated using Pearson’s Chi-squared or Fisher’s exact test