Table 2.
Transfusion Related Risk Factors
|
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 |