Figure 1

Receiver operating characteristic (ROC) curves for PCT, WBC/PLT and WBC for diagnosis of infection in cirrhotic patients. AUCs were 0.89 (95% CI: 0.84-0.91), 0.8 (95% CI: 0.72- 0.82 ) and 0.73 (95% CI: 0.64-0 .81) for PCT, WBC/PLT and WBC, respectively. The sensitivity ,specificity, PPV and NPV were 92.5%, 77.1%, 91.5%, and 79.4% at the cutoff of 0.5 ng/ml for PCT, 39.6%, 100%, 100%, and 38.1% at 0.25 for WBC/PLT, and 47.8%,100%,100% and 41.6% at 1.0 × 109/L for WBC. FPR=false positive rate (1- specificity), TPR= true positive rate (sensitivity), AUC= area under curve, CI = confidence interval, PPV=positive predictive value, NPV=negative predictive value.