How have red blood transfusion practices changed in critically ill patients? A comparison of the <scp>ICON</scp> and <scp>ABC</scp> studies conducted 13 years apart

The transfusion rate in ICU patients decreased during the 13-year period, despite patients being more severely ill in the more recent study; ICU mortality rates remained relatively stable. In patients who received more than 4 units of blood, the mortality rate was significantly lower in the more recent database.