In the non-sepsis group with AKI stage 2–3 the median hepcidin serum concentration was 11.5 nmol/L (IQR 1.2–40.5) versus 15.0 nmol/L (IQR 6.8–36.0) in non-septic patients with AKI 0 and AKI stage 1 (Fig 5). The gene discussed is HAMP; the disease is acute kidney injury.