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Unadjusted and adjusted hazard ratioa
| Unadjusted HR | Adjusted HR | |
|---|---|---|
| Unconstrained | 1 (ref.) | 1 (ref.) |
| CCK | 2.0 (1.2–3.3) | 1.4 (0.8–2.3) |
| Hinged | 3.3 (2.2–4.9) | 2.4 (1.6–3.7) |
Hazard ratio is shown unadjusted and adjusted for sex, age groups, diagnosis, time period, surgery time, previous surgery to the knee, perioperative complications, and ASA classification (registered since 2005 in the register).
