Figure 3
From: Age of red blood cells and transfusion in critically ill patients
Length of blood storage for positive (a[15, 16, 18, 23, 27, 28, 61]) and negative (b,[50–55, 58, 62]) studies. The age of blood is expressed as the mean age or the median age of all RBC units, or in some studies as the median of the oldest (or oldest and second oldest) RBC units. The figures give the age of blood for each study comparing the primary study outcome. For instance, if the study outcome is TRALI, the figure shows the age of blood in the group of patients with TRALI and in the group of patients without TRALI.