Table 2. Unadjusted Outcomes by Venous Thromboembolism Prophylaxis Treatment Group.
| Outcome | No. (%) | P Value of Pearson χ2 Testa | |||
|---|---|---|---|---|---|
| None | Aspirin Only | Anticoagulation | Both | ||
| Total No. | 668 (1.61) | 12 831 (30.89) | 22 620 (54.46) | 5418 (13.04) | NA |
| Composite VTE (death, PE, or DVT) | 32 (4.79) | 149 (1.16) | 321 (1.42) | 71 (1.31) | <.001 |
| Death | <10b | 13 (0.10) | 28 (0.12) | <10b | NA |
| Pulmonary embolism | 13 (1.95) | 41 (0.32) | 89 (0.39) | 25 (0.46) | <.001 |
| Deep venous thrombosis | 16 (2.40) | 95 (0.74) | 204 (0.90) | 41 (0.76) | <.001 |
| Bleeding outcome | 10 (1.50) | 116 (0.90) | 258 (1.14) | 73 (1.35) | .03 |
Abbrevations: DVT, deep venous thromboembolism; NA, not applicable; PE, pulmonary embolus; VTE, venous thromboembolism.
a
Pearson χ2 tests of homogeneity/independence for categorical variables with prophylaxis groups.
b
Actual numbers for cell size less than 10 are not shown.