Table 3. Results of the Multivariable Binary Logistic Regression Models.
| Variable | DVT only vs none (n = 277) | PE vs none (n = 40) | PT vs none (n = 117) | |||
|---|---|---|---|---|---|---|
| OR (95% CI) | P value | OR (95% CI) | P value | OR (95% CI) | P value | |
| Age at admission | 1.02 (1.00-1.04) | .048 | NA | NA | NA | NA |
| Head injury | 1.41 (1.05-1.89) | .02 | NA | NA | NA | NA |
| Spinal cord injury | 1.74 (1.14-2.67) | .01 | NA | NA | NA | NA |
| Shock on admission (SBP <90 mm Hg) | NA | NA | NA | NA | 2.74 (1.72-4.39) | <.001 |
| Chest injury | NA | NA | NA | NA | 1.72 (1.16-2.56) | .007 |
| Abdominal injury | 1.60 (1.20-2.12) | .001 | NA | NA | 1.58 (1.06-2.36) | .03 |
| Pelvic fracture | 1.36 (1.01-1.84) | .046 | 2.52 (1.31-4.86) | .006 | NA | NA |
| Long bone fracture | NA | NA | NA | NA | ||
| Venous injury | 1.64 (1.09-2.48) | .02 | 3.49 (1.60-7.62) | .002 | NA | NA |
| Femoral venous catheter | 2.25 (1.61-3.14) | <.001 | NA | NA | 2.19 (1.32-3.62) | .002 |
| Major operative procedure (≥1 h) | 1.56 (1.12-2.21) | .009 | NA | NA | 2.09 (1.18-3.71) | .01 |
| ≥4 d of ventilatory support | 3.68 (2.72-4.98) | <.001 | 10.1 (5.20-19.7) | <.001 | 2.21 (1.44-3.39) | <.001 |
| Tranexamic acid administration | 1.65 (1.16-2.35) | .005 | 2.48 (1.17-5.26) | .02 | NA | NA |
| Coagulopathy (INR >1.5) | NA | NA | NA | NA | NA | NA |
| History of VTE | NA | NA | NA | NA | 5.39 (1.19-24.4) | .03 |
| Heparin | ||||||
| 5000 U 2 times daily | NA | NA | NA | NA | 3.26 (1.27-8.35) | .01 |
| 5000 U 3 times per day | NA | NA | NA | NA | NA | NA |
| Enoxaparin | ||||||
| 30 mg Twice daily | 0.52 (0.39-0.70) | <.001 | NA | NA | NA | NA |
| 40 mg Once daily | 1.55 (1.10-2.18) | .01 | NA | NA | NA | NA |
Abbreviations: DVT, deep vein thrombosis; INR, international normalized ratio; NA, not applicable; OR, odds ratio; PE, pulmonary emboli; PT, pulmonary thrombosis; SBP, systolic blood pressure; VTE, venous thromboembolism.