| Variables | HHS | p-value | r (%) |
| Stiffness | 0.43 | 0.002* | 18 |
| Pain | 0.23 | 0.11 | 5 |
| Daily living | 0.50 | <0.001* | 25 |
| Sports/recreation | 0.60 | <0.001* | 36 |
| Quality of life | 0.39 | 0.007* | 15 |
| HOOS | 0.50 | <0.001* | 25 |