Table 5. Incidence of VTE after knee replacement in patients with significant risk factors.
| Risk factors | VTE | DVT | PE | ||||||
|---|---|---|---|---|---|---|---|---|---|
| No. (%) | OR (CI) | P value* | No. (%) | OR (CI) | P value* | No. (%) | OR (CI) | P value* | |
| VTE history | |||||||||
| Yes (n = 644) | 241 (17.2) | 8.5 (7.2-10.1) | < 0.001 | 199 (14.2) | 7.5 (6.3-9.0) | < 0.001 | 57 (4.1) | 8.6 (6.3-11.6) | < 0.001 |
| No (n = 26,661) | 1,749 (3.4) | 1,500 (2.9) | 298 (0.6) | ||||||
| Chronic heart failure | |||||||||
| Yes (n = 2,003) | 182 (4.8) | 1.3 (1.1-1.5) | 0.001 | 132 (3.5) | 1.1 (0.9-1.3) | 0.479 | 62 (1.6) | 2.7 (2.0-3.6) | < 0.001 |
| No (n = 25,302) | 1,808 (3.7) | 1,567 (3.2) | 293 (0.6) | ||||||
| Arrhythmia | |||||||||
| Yes (n = 1,862) | 206 (5.5) | 1.7 (1.4-1.9) | < 0.001 | 172 (4.6) | 1.6 (1.3-1.9) | < 0.001 | 45 (1.2) | 2.0 (1.4-2.8) | < 0.001 |
| No (n = 25,443) | 1,784 (3.6) | 1,527 (3.1) | 310 (0.6) | ||||||
| Atrial fibllation | |||||||||
| Yes (n = 736) | 101 (6.8) | 2.1 (1.7-2.6) | < 0.001 | 78 (5.2) | 1.8 (1.4-2.3) | < 0.001 | 29 (2.0) | 3.3 (2.2-4.9) | < 0.001 |
| No (n = 26,569) | 1,889 (3.7) | 1,621 (3.2) | 326 (0.6) | ||||||
*Chi-square test for comparing the incidence between patients with and without disease history. VTE, Venous thromboembolism; DVT, Deep vein thrombosis; PE, Pulmonary embolism.