Fig. 1
From: How and when to use common biomarkers in community-acquired pneumonia
Receiver operating characteristics curves (ROC) of different parameters for the diagnosis of pneumonia. a Diagnostic accuracy to predict CAP without chest radiography: Primary care approach. b Diagnostic accuracy to predict radiographically suspected CAP (control group (n = 20) includes other non-infectious diagnoses initially diagnosed as CAP): Emergency department approach. c Diagnostic accuracy to predict radiographically suspected CAP (control group (n = 44) includes other non-infectious diagnoses initially diagnosed as CAP (n = 20) plus patients without a clinically relevant bacterial aetiology of CAP (n = 24). d Diagnostic accuracy to predict bacteraemic CAP. Values show areas under the ROC curve with 95% CI. Chest auscult. = abnormal chest auscultation; CRP, C-reactive Protein; PCT, procalcitonin. Sourced from [12]