Table 2.

ROC analysis results.

	AUC	P-value	95% confidence interval
N-NOSE	0.742	<.001	0.664-0.819
CEA	0.638	.003	0.551-0.724
CA19-9	0.570	.133	0.480-0.660

Abbreviations: AUC, area under the curve; CA19-9, carbohydrate antigen 19-9; CEA, carcinoembryonic antigen; N-NOSE, Nematode-NOSE; ROC, receiver operating characteristic.

The results correspond to those shown in Figure 1. AUC indicates area under the curve. The P-values indicate whether the value of AUC is significantly different from the value of 0.5 AUC. The n is the number of the chemotaxis indices or values of tumour markers (eg, the 78 preoperative chemotaxis indices versus 78 postoperative indices).