Table 3.
Comparison of clinical outcomes.
| PSI group (n = 16) |
CO group (n = 23) |
P value | ||
|---|---|---|---|---|
| Operative duration (min) | 109.38 ± 20.83 | 131.65 ± 29.92 | 0.014 | |
| Radiation exposures (n) | 18.50 ± 4.80 | 28.22 ± 4.28 | <0.001 | |
| Intraoperative blood loss (mL) | 50.63 ± 14.36 | 97.82 ± 67.35 | 0.003 | |
| With and without BMP use/ Bone grafting (n) |
10 : 6 | 11 : 12 | 0.516 | |
| Neural injury (n) | 0 | 0 | — | |
| Lateral hinge fracture (n) | 0 | 2 | — | |
| Infection (n) | 0 | 0 | — | |
| Incisional exudation (n) | 1 | 0 | — | |
| American Knee Society Score (AKSS) | ||||
| Clinical AKSS |
Preop | 57.50 ± 2.00 | 57.13 ± 2.39 | 0.616 |
| Postop (3 months) | 75.63 ± 7.27 | 70.17 ± 8.37 | 0.042 | |
| Postop (6 months) | 85.00 ± 6.06 | 80.22 ± 7.42 | 0.040 | |
| Last follow-up | 90.31 ± 6.18 | 89.39 ± 6.33 | 0.654 | |
| Functional AKSS |
Preop | 58.75 ± 6.19 | 59.13 ± 7.63 | 0.870 |
| Postop (3 months) | 70.93 ± 8.00 | 64.78 ± 8.98 | 0.034 | |
| Postop (6 months) | 81.56 ± 4.73 | 80.43 ± 8.25 | 0.625 | |
| Last follow-up | 90.00 ± 6.32 | 89.57 ± 6.38 | 0.835 | |
(PSI: patient-specific instrumentation. CO: conventional operation. Preop: preoperative. Postop: postoperative).