Procedure-related complications in patients who had bilateral or unilateral total knee arthroplasty
| Complication | Group, no. (%)* | p value | OR (95% CI) | |
|---|---|---|---|---|
| UTKA, n = 966 | BTKA, n = 373 | |||
| Cardiovascular | ||||
| Arrhythmia | 8 (0.8) | 1 (0.3) | 0.46 | 3.1 (0.4–24.9) |
| Myocardial infarction | 4 (0.4) | 4 (1.0) | 0.23 | 0.4 (0.1–1.5) |
| Chronic heart failure | 10 (1.0) | 0 (0) | 0.07 | NA |
| Total | 22 (2.3) | 5 (1.3) | 0.39 | 1.7 (0.6–4.6) |
| Thromboembolic | ||||
| Deep vein thrombosis | 5 (0.5) | 2 (0.5) | > 0.99 | 1.0 (0.2–5.0) |
| Pulmonary embolism | 3 (0.3) | 1 (0.3) | > 0.99 | 1.2 (0.1–11.2) |
| Total | 8 (0.8) | 3 (0.8) | > 0.99 | 1.0 (0.3–3.9) |
| Neurologic | ||||
| TIA/stroke | 2 (0.2) | 0 (0.0) | > 0.99 | NA |
| Delirium | 12 (1.2) | 3 (0.8) | 0.77 | 1.6 (0.4–5.5) |
| Total | 14 (1.4) | 4 (1.1) | 0.79 | 1.4 (0.4–4.1) |
| Respiratory failure | 4 (0.4) | 2 (0.5) | 0.67 | 0.8 (0.1–4.2) |
| Renal failure | 1 (0.1) | 0 (0.0) | 0.28 | NA |
| Deep infection | 4 (0.4) | 1 (0.3) | > 0.99 | 1.5 (0.2–13.9) |
| Mortality | 1 (0.1) | 1 (0.3) | 0.48 | 0.4 (0–6.2) |
| Hospital stay, mean ± SD, d | 4.9 ± 2.9 | 5.3 ± 2.1 | 0.36 | 0.92 (0.88–0.98) |
| Transfusion | ||||
| Transfused | 86 (8.9) | 111 (29.8) | < 0.001 | 0.2 (0.2–0.3) |
| Units, mean ± SD | 1.53 ± 0.85 | 1.72 ± 0.77 | 0.68 | 0.89 (0.84–0.94) |
BTKA= bilateral total knee arthroplasty; CAD = coronary artery disease; CI = confidence interval; NA = not available; OR = odds ratio; SD = standard deviation; TIA = transient ischemic attack; UTKA= unilateral total knee arthroplasty.
↵* Unless otherwise indicated.