. Author manuscript; available in PMC: 2016 Nov 1.

Published in final edited form as: J Trauma Acute Care Surg. 2015 Nov;79(5):843–849. doi: 10.1097/TA.0000000000000834

Table 1. Pre- and Post-Transfusion Values for Cerebral Hemodynamics.

Variable	Total Median (IQR) n		P-value (Posttfx-Pretfx)	RBC (maximum) ≤ 21 days old Median (IQR) n		P-value (Posttfx-Pretfx)	RBC (maximum) > 21 days old Median (IQR) n		P-value (Posttfx-Pretfx)	P-value for difference in RBC≤21 vs. difference in RBC>21 groups
Variable	Pretfx	Posttfx	P-value (Posttfx-Pretfx)	Pretfx	Posttfx	P-value (Posttfx-Pretfx)	Pretfx	Posttfx	P-value (Posttfx-Pretfx)
Primary outcome: SjvO2 (n=59)	73.0 (15.0) 63	76.0 (15.0) 63	0.02	74.0 (15.0) 27	76.0 (17.0) 26	0.07	71.5 (15.5) 36	76.0 (13.0) 37	0.11	0.54
Secondary outcome: PbtO2 (n=77)	21.0 (16.7) 82	24.0 (18.1) 84	0.32	18.2 (16.6) 38	22.3 (18.8) 39	0.46	21.9 (15.7) 44	25.0 (19.4) 45	0.5	0.81
ICP (n=90)	16.0 (8.0) 94	17.0 (9.0) 96	0.67	16.0 (9.0) 43	17.0 (9.0) 42	0.53	16.0 (9.0) 51	17.0 (9.0) 54	0.26	0.19
MAP (n=103)	86.0 (21.0) 105	89.0 (16.0) 106	0.03	86.0 (17.0) 47	89.0 (15.0) 47	0.37	84.0 (23.0) 58	89.0 (17.0) 59	0.04	0.42
CPP (n=90)	70.0 (21.0) 94	73.0 (19.0) 96	0.2	70.0 (21.5) 44	73.0 (21.0) 43	0.38	70.0 (20.0) 50	73.0 (16.0) 53	0.5	0.85
FV (n=71)	90.0 (28.0) 71	88.0 (36.0) 71	0.22	90.0 (25.0) 37	88.0 (35.0) 37	0.76	90.5 (36.0) 34	88.0 (34.0) 34	0.14	0.46
FVOL (n=63)	541.3 (380.3) 63	451.7 (316.7) 65	<.01	545.0 (414.0) 33	462.2 (309.2) 34	0.15	529.9 (373.1) 30	380.0 (349.3) 31	<.01	0.37
Hgb (n=110)	9.0 (1.7) 110	10.2 (1.5) 110	<.01	9.0 (1.5) 49	10.0 (1.4) 49	<.01	8.7 (2.8) 61	10.2 (1.6) 61	<.01	0.12
PaO2 (n=59)	165.0 (84.0) 63	157.0 (71.0) 62	0.01	160.5 (81.5) 32	129.0 (82.0) 31	0.05	165.0 (104.0) 31	165.0 (63.0) 31	0.09	0.82
PaCO2 (n=60)	36.5 (10.5) 64	38.0 (8.0) 63	0.62	35.0 (11.0) 33	36.0 (7.5) 32	0.95	38.0 (5.0) 31	38.0 (8.0) 31	0.34	0.51

Abbreviations: posttfx, post transfusion; pretfx, pre transfusion; RBC, red blood cell age