Serum activin A as a prognostic biomarker for community acquired pneumonia

Figure 3 Receiver operating curve analysis for serum activin A concentrations to predict hospital mortality. A: Area under the receiver operating curve [areas under the curve (AUC)] for the biomarkers evaluated in this study; B: AUC of combination of activin A and CURB-65 or CURB-65 alone, P = 0.0005; C: AUC of combination of activin A and Pneumonia Severity Index (PSI) or PSI alone, P = 0.0094.