Fig. 2From: Anemia before in-hospital cardiac arrest and survival from cardio-pulmonary resuscitation—a retrospective cohort studyHeat map of Charlson comorbidity index versus lowest hemoglobin measured in the 48 h preceding the arrest (g/dL). Heat map showing the distribution of hemoglobin measurements between CCI scores highlighting that with lower hemoglobin measurements CCI riseBack to article page