Figure 3: Receiver operating characteristics (ROC) curves showing the performance of betatrophin concentration in detecting type 2 diabetes mellitus. The receiver operating characteristic curve analysis. The optimal cut-off point was 501.23 pg/mL. The area under the ROC curve (area between the solid line and -axis) was 0.824 (95% CI, area between the dashed lines and -axis, 0.748–0.885, ). The sensitivity and specificity are 83.56% and 72.41%, respectively.