Table 2. Mean values for circulating markers by pathology.

	Age, years	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
Normal	54.1	0.49	7.96	0.90	6.67	10.01	1.54	2.86
Polyps	70.2	0.65	15.04	2.68	7.76	11.89	3.25	5.56
Cancer	71.5	1.06	30.09	4.05	9.11	14.02	3.56	7.51

Abbreviation: CEA=carcinoembryonic antigen.