Table 4.

Area under the ROC curve of CTCs and hypothesis testing

	AUC	95% LCI	95% UCI	Youden	P
Epithelial CTCs	0.668	0.572	0.755	0.296	< 0.01
Hybrid CTCs	0.966	0.913	0.991	0.901	< 0.01
Mesenchymal CTCs	0.824	0.740	0.890	0.648	< 0.01
Total CTCs	0.996	0.960	1.000	0.901	< 0.01

CTC, circulating tumor cell; LCI, lower confidence interval; ROC, receiver operating characteristic; UCI, upper confidence interval.