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Table 4 Basic characteristics and outcome among propensity score matched groups

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

 

Transfusion

No transfusion

P value

N

1184

1184

 

Age, years, mean ± SD

64.2 ± 15.1

64.9 ± 14.2

0.255

Gender, male (%)

717 (60.6)

709 (59.9)

0.737

Severity scores on admission mean ± SD

   

   SAPS II score

41.8 ± 16.2

42.2 ± 17.8

0.370

   SOFA score

7.1 ± 3.3

7.3 ± 3.5

0.259

Referring facility

  

0.694

   Operating/recovery room

914 (77.2)

886 (74.8)

 

   Emergency room

55 (4.6)

88 (7.4)

 

   Other hospital

5 (0.4)

5 (0.4)

 

   Other ICU

101 (8.5)

88 (7.4)

 

   Others

109 (9.2)

117 (9.9)

 

Comorbidities (%)

   

   Diabetes mellitus

307 (25.9)

327 (27.6)

0.353

   Chronic renal failure

187 (15.8)

178 (15.0)

0.645

   Cancer

181 (15.3)

166 (14.0)

0.384

   Cirrhosis

28 (2.4)

27 (2.3)

0.892

   COPD

31 (2.6)

34 (2.9)

0.706

   Heart failure (NYHA III-IV)

18 (1.5)

17 (1.4)

0.865

   Hematologic cancer

3 (0.3)

2 (0.2)

0.654

Surgery within 24 hours (%)

  

0.460

   Cardiovascular surgery

563 (47.6)

593 (50.1)

 

   General surgery

174 (14.7)

133 (11.2)

 

   Neurosurgery

125 (10.6)

141 (11.9)

 

   Trauma

94 (7.9)

52 (4.4)

 

   Thoracic surgery

33 (2.8)

33 (2.8)

 

   Others

195 (16.5)

232 (19.6)

 

Unplanned admissions (%)

357 (30.2)

337 (28.5)

0.367

Hemoglobin concentration on admission to the ICU, mean ± SD

8.4 ± 1.9

8.3 ± 1.7

0.165

Minimum hemoglobin concentration during ICU stay, mean ± SD

8.4 ± 1.9

8.3 ± 1.7

0.219

Severity scores, mean ± SD

   

   SOFAmean

6.4 ± 3.0

6.5 ± 3.3

0.217

   SOFAmax

7.7 ± 3.5

7.5 ± 3.6

0.537

ICU mortality rate (%)

74 (6.3 )

87 (7.3)

0.289

Hospital mortality rate (%)

140 (11.8)

144 (12.2)

0.800

ICU LOS*, median (IQR)

1 (0-3)

1 (1-4)

0.276

Hospital LOS, median (IQR)

12 (9-29)

12 (9-17)

0.201

  1. * ICU LOS in patients who did not receive blood transfusion and the time to the first blood transfusion in transfused patients.
  2. COPD: chronic obstructive pulmonary disease; IQR: interquartile range; LOS: length of stay; NYHA: New York Heart Association; SAPS: simplified acute physiology score; SD: standard deviation; SOFA: sequential organ failure assessment.