Table 4.
Adverse outcomes following unicompartmental knee arthroplasty and high tibial osteotomy (matched analysis)
| HTO (n = 23,563) | UKA (n = 23,563) | After PSM (adjusted) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| N | % | 1000 PY | N | % | 1000 PY | HR | 95% CI | p value | |
| Deep vein thromboembolism | |||||||||
| Events | 133 | (0.56%) | 1.48 | 445 | (1.89%) | 4.16 | 0.27 | (0.21, 0.35) | < 0.0001 |
| Days | 699.70 | ± 860.22 | 297.80 | ± 657.60 | |||||
| Pulmonary thromboembolism | |||||||||
| Events | 79 | (0.34%) | 0.88 | 113 | (0.48%) | 1.06 | 0.78 | (0.59, 1.05) | 0.0989 |
| Days | 617.77 | ± 804.16 | 774.77 | ± 959.45 | |||||
| Cerebrovascular disease | |||||||||
| Events | 3817 | (16.20%) | 42.49 | 4237 | (17.98%) | 39.59 | 1.03 | (0.99, 1.08) | 0.16 |
| Days | 732.23 | ± 795.41 | 859.86 | ± 862.53 | |||||
| Myocardial infarction | |||||||||
| Events | 247 | (1.05%) | 2.75 | 283 | (1.20%) | 2.64 | 1.01 | (0.86, 1.21) | 0.86 |
| Days | 820.80 | ± 921.52 | 979.82 | ± 977.86 | |||||
| Acute renal failure | |||||||||
| Events | 171 | (0.73%) | 1.90 | 207 | (0.88%) | 1.93 | 1.01 | (0.82, 1.23) | 0.96 |
| Days | 1081.58 | ± 978.64 | 1203.01 | ± 943.17 | |||||
| Postoperative delirium | |||||||||
| Events | 42 | (0.18%) | 0.47 | 38 | (0.16%) | 0.36 | 1.34 | (0.86, 2.08) | 0.20 |
| Days | 831.36 | ± 843.03 | 1325.66 | ± 1018.10 | |||||
| Surgical site infection | |||||||||
| Events | 210 | (0.89%) | 2.34 | 565 | (2.40%) | 5.28 | 0.37 | (0.30, 0.44) | < 0.0001 |
| Days | 553.37 | ± 782.56 | 525.61 | ± 763.79 | |||||
UKA unicompartmental knee arthroplasty, HTO high tibial osteotomy, HR hazard ratio, CI confidence interval, PY person year, reference UKA, PSM propensity score matching