A Comparative Performance Analysis of Total PSA, Percentage Free PSA, PSA Velocity, and PSA Density versus the Detection of Primary Circulating Prostate Cells in Predicting Initial Prostate Biopsy Findings in Chilean Men

Table 3

Use of the tests to define active treatment or active observation in 113 patients with prostate cancer.

Type of; cancer	Free PSA		PSA velocity		PSA density		Total		CPC
	≤15%	>15%	≥0.75	<0.75	≥0.15	<0.15	(+)	(−)	(+)	(−)
Needs treatment	71	24	58	37	61	34	82	13	93	2
Active observation	9	9	9	10	8	10	11	7	7	11
𝑃 = Chi-squared	𝑃 = 0.07		𝑃 = 0.25		𝑃 = 0.11		𝑃 < 0.008		𝑃 < 0.001