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Table 1 Results of epidemiologic studies on anemia and blood transfusions in critical care

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

 

ABC Trial [2] (Western Europe)

CRIT Study [3] (USA)

TRICC Investigators [9] (Canada)

North Thames Blood Interest Group [5] (UK)

n

3534

4892

5298

1247

Mean admission hemoglobin (g/dl)

11.3 ± 2.3

11.0 ± 2.4

9.9 ± 2.2

-

Percentage of patients transfused in ICU

37.0%

44.1%

25%

53.4%

Mean transfusions per patient (units)

4.8 ± 5.2

4.6 ± 4.9

4.6 ± 6.7

5.7 ± 5.2

Mean pretransfusion hemoglobin (g/dl)

8.4 ± 1.3

8.6 ± 1.7

8.6 ± 1.3

8.5 ± 1.4

Mean ICU length of stay (days)

4.5

7.4 ± 7.3

4.8 ± 12.6

-

ICU mortality

13.5%

13.0%

22%

21.5%

Hospital mortality

20.2%

17.6%

-

-

Admission APACHE II (mean)

14.8 ± 7.9

19.7 ± 8.2

18 ± 11

18.1 ± 9.1

  1. Data are expressed as mean ± standard deviation. ABC, Anemia and Blood Transfusion in Critical Care; APACHE, Acute Physiology and Chronic Health Evaluation; ICU, intensive care unit; TRICC, Transfusion Requirements in Critical Care.