Table II.
Multivariate predictors of increased odds of DVT, PE, and VTE
| Variables | OR for DVTa (95% CI, P) | OR for PEb (95% CI, P) | OR for VTEc (95% CI, P) |
|---|---|---|---|
| Recent steroid use | 1.5 (1.0–2.3, .04) | — | 1.4 (1.01–2.0, .04) |
| Recent radiation therapy | — | 1.9 (1.2–3.2,<.01) | — |
| Age >60 years | 1.6 (1.2–2.2,<.01) | — | 1.4 (1.1–1.9, <.01) |
| −1.8 (1.2–2.5, <.01) | |||
| Body mass index ≥35 | 1.5 (1.2–2.0, <.01) | — | 1.3 (1.1–1.7, <.01) |
| Platelets ≥400 K | — | 1.5 (1.1–2.0, .01) | — |
| Transfusion ≥3 units | 1.5 (1.1–2.1, .02) | — | 1.3 (1.0–1.8, .05) |
| −3.4 (1.9–6.3, <.01) | −2.3 (1.3–4.1, <.01) | ||
| Deep infection | 1.5 (1.2–1.9, <.01) | 1.4 (1.0–2.0, .03) | 1.5 (1.2–1.9, <.01) |
| Reintubated | 1.5 (1.2–2.0, <.01) | 2.0 (1.4–2.8, <.01) | 1.7 (1.4–2.2, <.01) |
| PE | 11.5 (8.9–15.0, <.01) | — | — |
| DVT | — | 11.2 (8.6–14.6, <.01) | — |
| Urinary tract infection | — | 1.8 (1.3–2.5, <.01) | — |
| Peripheral nerve injury | 6.9 (2.5–19.2, <.01) | — | — |
| Sepsis postoperation | 1.5 (1.2–2.0, <.01) | — | 1.4 (1.1–1.7, <.01) |
| Shock postoperation | 1.5 (1.1–2.1, <.01) | — | 1.3 (1.0–1.7, .04) |
| Cardiac arrest | — | 3.1 (1.9–5.2, <.01) | 1.9 (1.3–2.8, .02) |
| Operative time (minutes) | 1.0 (1.0–1.001, <.01) | — | — |
| Length of stay >1 week | 2.9 (2.2–3.7, <.01) | 3.0 (2.3–4.0, <.01) | 3.4 (2.8–4.1, <.01) |
| −7.2 (4.4–11.7, <.01) | −6.4 (2.3–14.7, <.01) | −11.7 (7.8–17.5, <.01) |
CI, Confidence interval; DVT, deep venous thrombosis; OR, odds ratio; PE, pulmonary embolism; VTE, venous thromboembolic event.
a
See Appendix B (online only) for complete DVT multivariate model.
b
See Appendix C (online only) for complete PE multivariate model.
c
See Appendix E (online only) for complete VTE multivariate model.