Table 4

Univariate comparison of risk factors for VTE and outcomes between groups

Prophylaxis typeVTE
(n=106)
No VTE
(n=1941)
P value
Enoxaparin54%69%0.001
Unfractionated heparin23%13%
Therapeutic anticoagulation17%3%
None6%15%
Enoxaparin requiring anti-Xa adjustment38%30%0.083
Door-to-prophylaxis time, hours35 (14, 51)25 (11, 41)0.009
Median missed enoxaparin doses1 (0, 3)0 (0, 2)0.406
Acute renal failure21%11%0.004
Pneumonia41%19%<0.001
Sepsis56%23%<0.001
Acute respiratory failure74%51%<0.001
Median hospital-free days0 (0, 13)15 (0, 24)<0.001
Median ICU-free days1 (0, 23)25 (0, 30)<0.001
Median ventilator-free days4 (0, 28)28 (0, 30)<0.001
30-day survival88%86%0.728
  • ICU, intensive care unit; VTE, venous thromboembolism.