Fig. 2From: Diagnostic values of serum cathepsin B and D in patients with nasopharyngeal carcinomaReceiver operating characteristic (ROC) analysis of cathepsin D (CTSD). The area under the curve (AUC) of CTSD is 0.552 [95 % confidence interval (CI) 42.3–68.1]. Cutoff value of 14.7 mg/L had a sensitivity of 66.7 % and a specificity of 58.5 %Back to article page