Table 3. Relationship between AUC and diagnostic accuracy.

Items	Evaluation Criteria
AUC[9]	0.9–1.0	0.8–0.9	0.7–0.8	0.6–0.7	0.5–0.6	<0.5
Diagnostic accuracy	Excellent	Very good	Good	Sufficient	Bad	Test not useful

Note: [9] means area under the ROC curve, the closer the curve is located at upper-left hand corner and the large the AUC, the better the model is.