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Multivariate regression analysis, dependent variable: weaning failure
| Variable | OR | 95% CI | P value |
| RBC transfusion on WEA | 3.243 | 1.028 to 10.230 | 0.045 |
| Need for vasopressors on WEA | 1.557 | 1.093 to 2.217 | 0.014 |
| Hb value at admission on WEA | 1.375 | 0.887 to 2.132 | 0.155 |
| Duration of MV | 1.001 | 1.000 to 1.002 | 0.027 |
Hb, haemoglobin; MV, mechanical ventilation; RBC, red blood cell; WEA, weaning unit.
