Preoperative and 1-year functional outcome scores compared between improved and nonimproved patients. Scores are mean (SD).
| Score Type | Improved, n = 2804 | No Improvement, n = 373 | p |
|---|---|---|---|
| Baseline WOMAC pain | 10.7 (3.5) | 7.4 (3.6) | p < 0.0001 |
| 1-year WOMAC pain | 3.9 (3.5) | 8.8 (4.1) | p < 0.0001 |
| Baseline WOMAC total | 52.1 (16.6) | 42.6 (19.6) | p < 0.0005 |
| 1-year WOMAC total | 23.7 (16.8) | 43.1 (23.3) | p < 0.0001 |
| Baseline OKS total | 40.7 (7.1) | 35.4 (9.1) | p < 0.0001 |
| 1-year OKS total | 21.6 (7.5) | 35.2 (10.1) | p < 0.0001 |
WOMAC: Western Ontario McMaster University Osteoarthritis Index; OKS: Oxford Knee Score.