Fig. 2From: Interleukin-27: a novel biomarker in predicting bacterial infection among the critically illReceiver operating characteristic (ROC) curve for bacterially infected versus uninfected patients in the secondary analysis. The definition of infected includes those patients with blood culture-positive bacterial infections. The procalcitonin (PCT) curve is shown in grey and the interleukin-27 (IL-27) curve in black Back to article page