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Table 4 Results of the Transfusion Requirements in Critical Care (TRICC) trial in patients requiring mechanical ventilation

From: Scope of the problem: epidemiology of anemia and use of blood transfusions in critical care

  Restrictive Liberal P
n 357 356 -
Mortality, 30-day 21.3% 26.4% 0.11
Mortality, ICU 16% 19% 0.38
Mortality, hospital 25% 31% 0.07
Mean ventilator days 8.3 ± 8.1 8.8 ± 8.7 0.48
Mean ventilator-free days 17.5 ± 10.9 16.1 ± 11.4 0.09
Successful wean rates 82% 78% 0.19
Mean hemoglobin (g/dl) 8.4 ± 0.62 10.4 ± 0.71 <0.01
Mean blood transfusion (units) 2.7 ± 4.0 5.5 ± 5.1 <0.01
  1. Data are expressed as mean ± standard deviation. ICU, intensive care unit. Adapted from Hebert and coworkers [19].