Figure 4: Receiver operating characteristic (ROC) curve of plasma angiotensin II levels and other biomarkers during the second week of H7N9 infection.

ROC curve of the plasma angiotensin II levels, C-reactive protein (CRP), PaO2/FiO2 ratios, pneumonia severity index (PSI) scores and SMART-COP scores in the second week of avian-origin H7N9 Influenza A virus (A-OIV H7N9) infection are shown. Detailed information on the area under the ROC curve (AUC), the cut-off values, sensitivity, specificity, the positive predictive value (PPV), the negative predictive value (NPV), the positive likelihood ratio (PLR), the negative likelihood ratio (NLR) and Youden’s index are shown in Supplementary Tables 6–11.