Figure 2.

Receiver operating characteristic curve for the procalcitonin diagnosis of simple infection and infection complicated by congestive heart failure. (A) Diagnostic curve of procalcitonin (PCT) for simple bacterial infections. The area under the receiver operating characteristic curve shown is above 80%, which means PCT still has the diagnostic value for simple bacterial infection and infection complicated by congestive heart failure. (B) Diagnostic curve of PCT for infection complicated by congestive heart failure. ROC, Receiver operating characteristic curve. The dashed line is the baseline that result from random classification.