Table 3. Risk Factors of VTE as Determined by Univariate and Multivariate Analysis.
| Variable | VTE (+) | VTE (−) | Univariate OR (95% CI) | P-value | Mutivariate OR (95% CI) | P-value |
|---|---|---|---|---|---|---|
| Prophylactics (RXB) | 12 | 983 | 0.601 (0.308-1.172) | <0.001 | 0.610 (0.412-1.761) | <0.001 |
| Sex | 0.062 | |||||
| Female | 22 | 1,633 | 1.763 (0.971-3.201) | |||
| Male | 22 | 926 | 1 | |||
| Operation site | 0.064 | |||||
| Knee | 21 | 1,133 | 1.149 (0.632-2.087) | |||
| Hip | 23 | 1,426 | 1 | |||
| Unilateral vs. bilateral | 0.028 | |||||
| Unilateral | 34 | 1,999 | 1 | |||
| Bilateral | 10 | 275 | 2.138 (1.044-4.375) |
Binary logistic regression test, statistical power=0.313. ORs after adjusting for confounders, such as sex, operation site, and laterality.
VTE: venous thromboembolism, RXB: rivaroxaban, OR: odd ratio, CI: confidence interval.