Red Cell Storage Duration Does Not Affect Outcome after Massive Blood Transfusion in Trauma and Nontrauma Patients: A Retrospective Analysis of 305 Patients

Table 2

Summary of baseline patient characteristics by type of surgery. Statistics reported as a percentage, mean ± standard deviation, or median [first quartile, third quartile]. Medians and quartiles are reported when the sample skewness coefficient is >0.9 in absolute value.

Factor	Level	Nontrauma	Trauma	Percent missing
		Year of admission	2006		2	12	0.7
2007	10		10
2008	29		23
2009	27		20
2010	16		16
2011	15		19
Age		53 ± 15	42 ± 18
Female sex		42	26
Body mass index (kg/m^2)		25	27	36.3
Patient blood type	A−	8	10	0.7
	A+	32	29
	AB+	4	3
	B−	1	3
	B+	7	9
	O−	12	6
	O+	36	40
Heart disease		33	10
Pulmonary disease		15	7
Renal disease		5	0
Hypertension		60	25
Diabetes mellitus		22	7
Carcinoma		36	4
Liver disease		21	9
Tobacco use		36	21
Alcohol use		12	9
Illicit drug use		3	9
Initial heart rate (beats per minute)		91	112	1.3
Initial systolic blood pressure (mmHg)		116 ± 25	98 ± 36	0.7
Initial temperature (°C)		36	36	14.1
ED crystalloids (L)		0.6	2.0	32.1
Length of surgery (min)		214	130	6.9
Total number of units transfused		18	23
Minimum PRBC storage duration		15 ± 7	12 ± 6
Maximum PRBC storage duration		37	37
Initial laboratory values
Hemoglobin (g/dL)		10	11	4.3
Blood pH		7.3	7.2	2.3
Platelet count (k/mcL)		178	189	2.3
International normalized ratio		1.3	1.5	4.9
Activated prothrombin time (s)		14	16	5.2
Activated partial thromboplastin time (s)		34	39	4.9