Fig. 2

Prognostic performance of five disease severity scores. In-hospital mortality (%) as a function of disease severity categories of all disease severity scores in the total cohort (a), patients <70 years (b), and patients >70 years (c) was shown. Each disease severity score was divided into 4 categories to allow comparison among the 5 individual scores: low (PIRO 0–6, qSOFA 0, MEDS 0–5, MEWS 0–3 and NEWS 0–3), moderate (PIRO 7–12, qSOFA 1, MEDS 6–9, MEWS 4–6 and NEWS 4–7), high (PIRO 13–18, qSOFA 2, MEDS 10–15, MEWS 7–9 and NEWS 8–11) and severe (PIRO ≥19, qSOFA 3, MEDS ≥16, MEWS ≥10 and NEWS ≥12). These values were chosen taking into account the individual score guidelines to best represent comparable disease severity categories