Figure 5.

Receiver operator characteristic (ROC) curve for PCVA. The figure shows the area under the receiver operator characteristic (ROC) curve for PCVA against HCOD. The area under the curve captures the relationship between the sensitivity and specificity of the PCVA method and is therefore indicative of how the method performed with respect to HCOD. The overall diagnostic measure for PCVA was 0.88, indicating good diagnostic performance of the method. Also, the curve follows the left-hand border and then the top border of the ROC space, indicating an acceptable level of accuracy.