Table 3.

Outcome data for groups receiving newer vs. older blood in the blood-prime group

Variable	Patients Receiving Newer Blood (N = 116)	Patients Receiving Older Blood (N = 76)	P value
Mechanical ventilation time (hours)
Median	48	48	0.638
Interquartile range	13 to 109	11 to 120
ICU stay (hours)
Median	96	96	0.702
Interquartile range	48 to 150	48 to 192
Peak creatinine (mg/dL)
Median	0.55	0.60	0.334
Interquartile range	0.40 to 0.90	0.40 to 0.80
Peak bilirubin (mg/dL)
Median	1.3	1.4	0.503
Interquartile range	0.62 to 2.12	0.79 to 2.00
Blood loss (mL/12 hours)
Median	70	60	0.156
Interquartile range	40 to 100	30 to 100
Red blood cells transfusions
No. of patients (%)	69 (59)	47 (62)	0.760
Fresh frozen plasma transfusions
No. of patients (%)	55 (47)	39 (51)	0.607
Platelets transfusions
No. of patients (%)	4 (3.5)	9 (12)	0.024

ICU = intensive care unit.

Continuous variables are summarized by medians and interquartile ranges, and P values were calculated by the Wilcoxon rank-sum test; categorical variables are summarized by numbers and percentages, and P values were calculated by the Pearson's chi-square test.