Unadjusted and adjusted ORs for total knee replacement in case versus control groups with respect to each covariate included in the model
| Covariate | Unadjusted OR (95% CI) | Adjusted OR (95% CI) |
| ACL injury | 8.00 (5.61 to 11.42) | 6.96 (4.70 to 10.27) |
| Meniscal injury | 15.31 (13.99 to 16.75) | 15.24 (13.88 to 16.69) |
| Fractures around the knee | 3.21 (1.81 to 5.67) | 3.65 (1.96 to 6.79) |
| Body mass index | 1.14 (1.14 to 1.14) | 1.12 (1.11 to 1.12) |