Table 2.
Factors influencing the willingness to undergo TKA surgery again given as mean (SD) and absolute (relative) frequencies
| Would you undergo the surgery again? | p value | ||
|---|---|---|---|
| Yes, likely 441 (84.5%) |
Uncertain, unlikely, no 81 (15.5%) |
||
| Age at surgery (years) | 68.3 (SD 9.6) | 68.1 (SD 10.1) | ns |
| BMI (kg/m2) | 30.7 (SD 5.6) | 31.6 (SD 6.0) | ns |
| Gender | |||
| Male | 220 (49.9%) | 27 (33.3%) | |
| Female | 221 (50.1%) | 54 (66.7%) | 0.006 |
| Indication for TKA | |||
| Primary OA | 392 (88.9%) | 75 (92.6%) | |
| Secondary OA | 49 (11.1%) | 6 (7.4%) | ns |
| Leg alignment | |||
| Before surgerya | 8 (4.2) | 6.1 (4.3) | 0.002 |
| Postoperativelya | 2.1 (1.7) | 2.5 (1.8) | ns |
| Correction | 5.9 (4.2) | 3.6 (4.8) | < 0.001 |
| Treatment effect | 0.61 (0.28) | 0.26 (SD 0.32) | < 0.001 |
| Responder | 399 (90.5%) | 49 (60.5%) | |
| Non-responder | 42 (9.5%) | 32 (39.5%) | < 0.001 |
| Satisfaction with TKA | 8.4 (SD 1.6) | 6.4 (SD 2.2) | < 0.001 |
| Oxford Knee Score [0–48 points] | |||
| Before surgery | 22.6 (SD 6.9) | 21.0 (SD 6.2) | 0.049 |
| One-year follow-up | 38.2 (SD 7.4) | 28.4 (SD 9.0) | < 0.001 |
| Improvement | 15.6 (SD 8.2) | 7.4 (SD 8.8) | < 0.001 |
| OKS function subscale [0–100 points] | |||
| Before surgery | 52.2 (SD 16) | 48.1 (SD 14.2) | 0.031 |
| One-year follow-up | 74.7 (SD 16.2) | 53.7 (SD 17.7) | < 0.001 |
| Improvement | 22.4 (SD 17.9) | 5.6 (SD 17.2) | < 0.001 |
| OKS pain subscale [0–100 points] | |||
| Before surgery | 43.3 (SD 15.9) | 40.5 (SD 14.7) | ns |
| One-year follow-up | 83.0 (SD 16.9) | 63.0 (SD 21.5) | < 0.001 |
| Improvement | 39.7 (SD 19.8) | 22.5 (SD 22.3) | < 0.001 |
aDeviation in degrees from a neutral leg axis