Skip to main content
Figure 2 | BMC Infectious Diseases

Figure 2

From: Measurement of serum procalcitonin levels for the early diagnosis of spontaneous bacterial peritonitis in patients with decompensated liver cirrhosis

Figure 2

Receiver operating characteristic (ROC) curves for PCT, WBC/PLT and WBC for diagnosis of SBP in cirrhotic patients. AUCs were 0.89 (95% CI: 0.82-0.97), 0.79 (95% CI: 0.61-0 .87), and 0.73 (95% CI: 0.61-0.82), for PCT, WBC/PLT and WBC, respectively. The sensitivity ,specificity, PPV and NPV were 68.8%, 94.2%, 95.4%, and 63.5% at the cutoff of 2 ng/ml for PCT, 30.0%, 100%, 100%, and 47.9% at 0.25 for WBC/PLT, and 44.3%, 100%, 100%, and 50.7% 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.

Back to article page