Figure 2From: Saliva as a potential tool for cystic fibrosis diagnosisROC curves for chloride and sodium. A. ROC curve for chloride concentration. Cutoff: 13.5mmol/l, sensitivity: 73.4%, specificity: 70.6%; B. ROC curve for sodium concentration. Cutoff: 20mmol/l, sensitivity: 68.1%, specificity: 72.9%.Back to article page