Table 2. Summary of results for CTC detection in all sample groups.

		CTC positive	Cells per ml blood
Sample group	n	n (%)	Range	Mean	Median
Colorectal	25	23 (92)	0–10.2	1.96	0.9
Prostate	10	10 (100)	0.3–9.4	3.99	3.6
Ovarian	4	4 (100)	0.5–1.9	0.98	0.75
Elevated PSA/NEM	7	3 (42.9)	0–1.7	0.64	0
Healthy controls	11	0 (0)	0	0	0

Abbreviations: PSA=prostate specific antigen; NEM=no evidence of malignancy upon biopsy.