Figure 3From: Diagnostic utility of pleural fluid and serum markers in differentiation between malignant and non-malignant pleural effusions Receiver operating characteristics (ROC) curves for the four best single parameters calculated with the Youden index (Panel A) and ROC curves for combined parameters (Panel B). The AUC for combined pleural markers was 0.89, combined serum markers 0.82, and for combined ratio pleural/serum markers 0.88.Back to article page