. Author manuscript; available in PMC: 2007 Aug 24.

Published in final edited form as: Prostate. 2005 Nov 1;65(3):216–221. doi: 10.1002/pros.20286

TABLE III.

Coefficient of Analytical Variation (CVa) and Calculated Coefficient of Biological Variation (CVb) Between Screenings of 1995–1996 and 1997–1998

Group	fPSA	tPSA	cPSA	%fPSA
CVa, %
Controls	7.2	5.6	5.5	7.7
CVb, %
A	9.7	12.5	12.7	5.7
B	7.8	11.4	12.2	4.7
C	7.5	10.0	11.2	1.8

Group A represents men with tPSA ≤ 0.61 ng/ml, group B men with tPSA ≤ 0.99 ng/ml and group C men with tPSA 1.00–1.99 ng/ml, in 2001–2002.

CVa is expressed as mean and CVb as geometric mean.

Calculated parameters are shown in italics.