Table 3. Comparison of the area under the ROC curve (AUC) of our model with their models.

Model	AUC	Standard deviation	P value	95% confidence interval
				Lower limit	Upper limit
Proposed model	0.910	0.027	−	0.857	0.963
Our model without Cyfra21-1	0.812	0.025	0.008	0.763	0.861
Brock model	0.878	0.021	0.350	0.837	0.929
PKUPH model	0.833	0.026	0.040	0.782	0.884
Mayo model	0.752	0.045	0.003	0.664	0.841
VA model	0.730	0.047	0.001	0.638	0.822

ROC, receiver operating characteristic; AUC, area under the curve.