Figure 3 . Receiving operating characteristic (ROC) curve analysis of CXCL16, SOFA score, PCT, and CRP at admission for predicting 28-day mortality in septic patients. Area under the ROC curve: 0.717 ([95% CI] 0.497–0.939) for CXCL16; 0.849 ([95% CI] 0.715–0.982) for SOFA score; 0.617 ([95% CI] 0.429–0.805) for PCT; and 0.521 ([95% CI] 0.338–0.705) for CRP.