Table 4. ROC curve values for each marker and combination marker by pathology.

	CEA ng ml–1	Total nuclear DNA ng ml–1 plasma	Mitochondrial DNA ng ml–1 plasma	Line1 79/ Line1 300	Alu 115/247	Line1 300 ng ml–1 plasma	Alu 247 ng ml–1 plasma	Combined marker
Polyps vs normal	0.596	0.756	0.743	0.512	0.511	0.691	0.731	0.797
Cancer vs normal	0.574	0.757	0.675	0.759	0.772	0.594	0.716	0.863
Polyps and cancer vs normal	0.586	0.756	0.713	0.624	0.629	0.647	0.724	0.810

Abbreviations: CEA=carcinoembryonic antigen; ROC=receiver operator characteristic.