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Table 3 Outcome according to the number of transfused blood units

From: Anemia and blood transfusion in a surgical intensive care unit

 

1 unit

(n = 381)

2 units

(n = 683)

3-4 units

(n = 378)

5-8 units

(n = 224)

>8 units

(n = 167)

SOFA scores in the ICU, mean ± SD

     

   SOFAmax †

7.5 ± 3.3

7.9 ± 3.6*

9.7 ± 3.4*

12.4 ± 3.7*

14.9 ± 3.0*

   SOFAmean †

6.3 ± 2.9

6.5 ± 3.2*

7.5 ± 3.1*

8.6 ± 3.6*

9.8 ± 3.3*

ICU LOS, days, median (IQR) ‡

2 (1-5)

3 (1-5)*

4 (2-9)*

13 (6-21)*

28 (15-41)*

Hospital LOS, days, median (IQR)

14 (10-20)

13 (10-22)

15 (11-25)*

20 (13-30)*

34 (20-59)*

Death in ICU (%) †

16 (4.2%)

45 (6.6%)

37 (9.8%)*

58 (25.9%)*

73 (43.7%)*

Death in hospital (%) †

37 (9.7%)

88 (12.9%)

58 (15.3%)*

69 (30.8%)*

84 (50.3%)*

  1. † P < 0.001 between groups; ‡ P < 0.05 between groups; * P < 0.001 vs. patients transfused with one unit of blood. IQR: interquartile range; LOS: length of stay; SD: standard deviation; SOFA: sequential organ failure assessment.