Fig. 4

Comparison of the receiver operating characteristic curves of the prediction rules for severe adverse events in the validation cohort. Definition of abbreviations: SMART-COP, systolic blood pressure, multilobar chest X-ray involvement, albumin, respiratory rate, tachycardia, confusion, oxygenation, and arterial pH; IDSA/ATS, Infectious Disease Society of America/American Thoracic Society; SCAP, severe community-acquired pneumonia; PSI, Pneumonia Severity Index; CURB-65, confusion, urea level, respiratory rate, blood pressure, and age ≥ 65 years