25 November 2023 : Clinical Research
Risk Factors for Postoperative Knee Stiffness in Patients with Anteromedial Knee Osteoarthritis Undergoing Unicompartmental Knee Arthroplasty with Cemented Prostheses: A Short-Term, Retrospective, Case-Control Study
Congcong Wei1ABCDEF, Xihan Zhang1B, Mingming Dong2B, Boyi Lei1B, Jiangbo Zhao1B, Xiangdong Xi1B, Shuai Zhao1B, Baigang Zhou1AG*DOI: 10.12659/MSM.942440
Med Sci Monit 2023; 29:e942440
Table 2 Preoperative clinical results in patients with center knee osteoarthritis undergoing unicompartmental knee arthroplasty.
| Feature of the patients | Patients without post-operative knee stiffness (n=530) | Patients with post-operative knee stiffness (n=60) | Total (n=590) | P |
|---|---|---|---|---|
| OA degree | ||||
| 175 (33.02%) | 15 (25%) | 190 (32.2%) | 0.370 | |
| ≥Ahlback grade 2 | 355 (66.98%) | 45 (75%) | 400 (67.8%) | |
| Preoperative activity level | ||||
| 220 (41.51%) | 15 (25%) | 235 (39.83%) | 0.122 | |
| ≥Tegner scale 4 | 310 (58.49%) | 45 (75%) | 355 (60.17%) | |
| Varus deformity | ||||
| ≥5° | 400 (75.47%) | 15 (25%) | 415 (70.34%) | <0.001 |
| <5° | 130 (24.53%) | 45 (75%) | 175 (29.66%) | |
| Preoperative HKA angle (degrees) | 169.9±4.3 | 169.6±4.1 | 169.7±4.2 | 0.112 |
| Preoperative KSKS | 45.4±10.0 | 43.4±10.0 | 44.4±10.0 | 0.052 |
| Preoperative KSFS | 55.4±13.2 | 50.4±19.7 | 52.9±16.5 | 0.081 |
| Preoperative maximum flexion (degrees) | 132.0±6.4 | 126.8±7.2 | 128.9±6.8 | <0.001 |
| Preoperative maximum extension (degrees) | 4.9±4.4 | 4.7±3.5 | 4.8±3.9 | 0.106 |
| VAS score | 3.92±2.45 | 4.08±2.50 | 4±2.47 | 0.759 |