Table 2 Operative and postoperative outcomes
Outcomes | Overall (n = 85) | No pain (n = 65) | Pain (n = 20) | Mean difference (95% CI) | p-value |
|---|---|---|---|---|---|
Depth of tibial resection (mm) | |||||
Anterior | 7.3 ± 1.9 | 7.4 ± 1.8 | 7.0 ± 2.3 | 0.4 (− 0.6 to 1.4) | 0.404 |
Middle | 4.9 ± 1.8 | 4.8 ± 1.7 | 5.1 ± 2.1 | − 0.2 (− 1.2 to 0.7) | 0.611 |
Posterior | 5.1 ± 1.7 | 5.0 ± 1.6 | 5.3 ± 2.0 | − 0.4 (− 1.2 to 0.5) | 0.372 |
Maximal depth | 7.5 ± 1.9 | 7.5 ± 2.0 | 7.5 ± 1.4 | 0.1 (− 0.9 to 1.0) | 0.909 |
Femoral component size | |||||
Small | 67 (78.8%) | 50 (76.9%) | 17 (85.0%) | NA | 0.131 |
Medium | 10 (11.8%) | 10 (15.4%) | 0 (0.0%) | NA | |
Large | 8 (9.4%) | 5 (7.7%) | 3 (15.0%) | NA | |
Tibial component size | |||||
AA | 13 (15.3%) | 10 (15.4%) | 3 (15.0%) | NA | 0.037 |
A | 21 (24.7%) | 18 (27.7%) | 3 (15.0%) | NA | |
B | 28 (32.9%) | 17 (26.2%) | 11 (55.0%) | NA | |
C | 17 (20.0%) | 16 (24.6%) | 1 (5.0%) | NA | |
D | 3 (3.5%) | 3 (4.6%) | 0 (0.0%) | NA | |
E | 3 (3.5%) | 1 (1.5%) | 2 (10.0%) | NA | |
Polyethylene thickness | |||||
3 mm | 48 (56.5%) | 38 (58.5%) | 10 (50.0%) | NA | 0.825 |
4 mm | 26 (30.6%) | 19 (29.2%) | 7 (35.0%) | NA | |
5 mm | 10 (11.8%) | 7 (10.8%) | 3 (15.0%) | NA | |
6 mm | 1 (1.2%) | 1 (1.5%) | 0 (0.0%) | NA | |
Mean thickness | 3.6 ± 0.7 | 3.6 ± 0.8 | 3.7 ± 0.7 | −0.1 (−0.5 to 0.3) | 0.617 |
Postoperative FTA (°) | 179.8 ± 2.4 | 179.8 ± 2.3 | 179.8 ± 2.8 | 0.0 (1.2 to 1.2) | 1.000 |
Tibial tray inclination (°) | 88.5 ± 2.2 | 88.6 ± 2.2 | 88.2 ± 2.0 | 0.3 (−1.4 to 0.8) | 0.589 |
Tibial tray slope (°) | 4.2 ± 2.0 | 4.1 ± 2.0 | 4.3 ± 2.1 | − 0.1 (− 1.1 to 0.9) | 0.827 |
OKS (score) | |||||
At 6 wk | 32.6 ± 7.6 | 33.7 ± 6.5 | 28.9 ± 9.7 | 4.8 (0.0 to 9.6) | 0.049 |
At 6 mon | 40.8 ± 4.5 | 41.0 ± 4.8 | 40.0 ± 3.4 | 1.1 (− 1.2 to 3.5) | 0.326 |