Table III.
Regression analysis of select variables for prediction of deep vein thrombosis (DVT)
| Variable | Univariate OR (95% CI) | Univariate P value | Multivariable OR (95% CI) | Multivariable P value |
|---|---|---|---|---|
| Sex, male | 1.60 (0.81-3.15) | .17 | – | – |
| Age, years | 0.99 (0.97-1.02) | .56 | – | – |
| Diabetes mellitus | 0.46 (0.23-0.93) | .03 | 0.51 (0.23-1.14) | .10 |
| Smoking history | 0.60 (0.18-1.93) | .39 | – | – |
| Hypertension | 0.56 (0.28-1.16) | .12 | – | – |
| Disseminated cancer | 0.33 (0.04-2.79) | .31 | – | – |
| Immobilization | 0.52 (0.18-1.49) | .23 | – | – |
| Sepsis | 1.03 (0.51-2.09) | .94 | – | – |
| Septic shock | 0.38 (0.08-1.82) | .23 | – | – |
| DVT prophylaxis | ||||
| None | Reference | Reference | – | – |
| Subcutaneous heparin | 1.47 (0.45-4.79) | .52 | – | – |
| Low-molecular-weight heparin | 0.37 (0.11-1.33) | .13 | – | – |
| Intubation | 2.56 (1.24-5.27) | .01 | 1.98 (0.87-4.51) | .10 |
| Wells DVT criteria, likely (≥2) | 1.75 (0.89-3.48) | .11 | – | – |
| Custom acute-phase d-dimer status (>6494 ng/mL DDU), elevated | 9.29 (4.16-20.7) | <.001 | 7.59 (3.34-17.3) | <.001 |
CI, Confidence interval; DDU, d-dimer unit; OR, odds ratio.