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Table 2 Transfusion Related Risk Factors

From: Outcomes in cardiac surgery in 500 consecutive Jehovah's Witness patients: 21 year Experience

Variable

Group A n = 250

Group B n = 250

P

 

1991-1998

1998 - 2012

 

Blood Volume (ml)

5 200 +/- 480

5000 +/- 610

>0.05

Preoperative HCT (%)

41+/-2

40+/-4

<0.001

Preoperative erythrocyte mass (ml)

2215+/- 250

2010+/-200

< 0.05

Platelets

220 ± 60

180 ± 50

< 0 .05

Body Mass Index

25 ± 5

24 ± 3

>0.05

Age

51+/-7

68+/-5

<0.001

Female gender

11

28

<0.001

Diabetes

24

31

>0.05

Renal Failure

10%

10%

>0.05

Euroscore

4.1 +/- 0.8

4.8 +/- 1.3

<0.05

Ejection Fraction

0.45+/-0.2

0.40+/-0.1

<0.001

Aortic Clamp Time

70+/-15

65+/-30

< 0.05

Ischemic Time

55+/-10

48+/-15

>0.05

Blood Loss (ml)

515 ± 310

350 ± 140

<0.001