Multivariate model of return to pivoting sport and knee OA at the 15-year follow-up (n=164)
| Dependent variables | Symptomatic OA (KL≥2) | Radiographic OA (KL≥2) | ||||
| Independent variables | OR | 95% CI | P values | OR | 95% CI | P values |
| Returned to pivoting sport (n = 85) | 0.28 | 0.09 to 0.89 | 0.031 | 0.40 | 0.17 to 0.98 | 0.045 |
| Age | 1.06 | 0.99 to 1.13 | 0.074 | 1.10 | 1.04 to 1.17 | 0.001 |
| Sex | 1.23 | 0.42 to 3.66 | 0.698 | 1.97 | 0.79 to 4.92 | 0.147 |
| Combined injury up to 15 years | 13.4 | 1.7 to 107 | 0.008 | 7.49 | 2.29 to 24.5 | 0.001 |
| Self-reported knee function at 6 months* | 1.03 | 0.99 to 1.06 | 0.126 | 1.04 | 0.99 to 1.07 | 0.056 |
| Time between injury and surgery, months | 0.99 | 0.99 to 1.00 | 0.725 | 1.00 | 0.99 to 1.01 | 0.679 |
Covariates in the multivariate model were age, sex, combined injury, self-reported knee function, and time between injury and surgery. Reference groups: not returning to pivoting sport; women, having isolated injury.
*Cincinnati Knee Score (0–100).
KL, Kellgren and Lawrence; OA, osteoarthritis.