Table 2.

Transfusion data as a function of the age of transfused blood

Variable	Old blood (n = 110 units)	New blood (n = 26 units)	P
Age of transfused  blood, d	26.0	10.2	<.001
Tpre, h	4.4	4.9	.64
Tpost, h	4.0	4.5	.42
Pretransfusion  hematocrit  level, %	21.8	20.4	.31
Post-transfusion  hematocrit  level, %	25.6	25.9	.91
Change in Hct, %	3.5	5.6	.005
Change in  hemoglobin  level, g/dL	1.3	2.0	.03