American Knee Society Scores (AKSS) Knee and Function scores (mean, 95% CIs) for Oxford Knee Score quartiles
| Oxford Knee Score quartile | AKSS Knee Score | AKSS Function score | ||||
| Preoperative | n=284 | Mean | 95% CI | n=284 | Mean | 95% CI |
| 1 (good) | 75 | 32.1 | 28.9, 32.5 | 75 | 59.7 | 56.0, 63.4 |
| 2 | 69 | 26.5 | 23.1, 30.0 | 69 | 53.3 | 50.0, 56.7 |
| 3 | 73 | 27.4 | 24.3, 30.4 | 73 | 48.4 | 45.9, 51.0 |
| 4 (poor) | 67 | 23.9 | 20.5, 27.3 | 67 | 36.0 | 32.1, 39.9 |
| Postoperative | n=226 | Mean | 95% CI | n=226 | Mean | 95% CI |
| 1 (good) | 56 | 93.3 | 91.9, 94.8 | 56 | 81.4 | 75.7, 87.1 |
| 2 | 52 | 91.8 | 90.1, 93.9 | 52 | 74.2 | 68.4, 80.1 |
| 3 | 67 | 83.3 | 80.1, 86.6 | 67 | 66.3 | 61.7, 71.0 |
| 4 (poor) | 51 | 68.6 | 63.3, 73.9 | 51 | 55.8 | 50.8, 60.9 |