Fig. 4

Serum ferritin as biomarker for final outcome in sepsis. a Comparison of early mortality between the Greek test cohort and the Greek validation cohort for patients with ferritin > 4420 ng/ml. b–d Kaplan-Meier curves of survival in the test Greek cohort (b), in the Greek validation cohort (c), and in the Swedish validation cohort (d) for 28 days in relation to ferritin levels. Log-rank tests and p values are provided. Ferr ferritin