Sexual Dimorphism in Hematocrit Response Following Red Blood Cell Transfusion of Critically Ill Surgical Patients

Table 3

Sample characteristics stratified by recipient gender.

Variable	Male Recipient (𝑛=398)	Female recipient (𝑛=177)	𝑃
Recipient characteristics
Age (years)	48.0	52.5	<0.01
Admission diagnosis of trauma	296 (74.8%)	87 (48.6%)	<0.01
Transfusion indication of ICU anemia	351 (88.6%)	172 (97.2%)	<0.01
Admission weight (kg)	82.7	81.2	0.44
Admission BMI (kg/m^2)	30.9	26.6	<0.01
24 Hour fluid balance (L)	2.0	2.1	0.73
Transfusion data
Time from ICU admission to transfusion (days)	14.1	12.8	0.22
Hctpre (% points)	21.6	21.3	0.13
Tpre (hours)	3.2	3.3	0.73
Tpost (hours)	4.5	4.7	0.69
pRBCs storage time (days)	30.4	27.7	<0.01
Donor male gender	197 (49.8%)	92 (51.4%)	0.71
Additional blood products	16 (4.0%)	12 (6.7%)	0.17

ICU, intensive care unit; BMI, body mass index; pRBCs, packed red blood cells.