Table 2. TTEST analyses within groups.

	Delta Ct IGFBP3	Delta Ct F3	log(PSA)a	Age, year	Gleason score	Tumor stage
RA
Mean	3.46	1.55	1.00	67.07	6.74	1.77
STD	1.94	1.90	0.37	7.75	0.90	0.78
N	49	49	54	54	53	53
TTESTb, P
RA vs. PCa	0.5271	0.0026*	<0.0001*	0.0002*	<0.0001*	<0.0001*
RA vs. OD	0.0044*	0.0255*	0.0290*	<0.0001*	0.1633	0.7100
RA vs. MA	0.0008*	0.0280*	0.1451	0.0150*	0.0158*	0.8100
MA
Mean	4.74	2.59	1.12	70.98	7.21	1.81
STD	1.86	2.76	0.46	9.16	1.14	0.82
N	57	57	63	63	61	63
TTESTb, P
MA vs. PCa	<0.0001*	0.2786	<0.0001*	0.1750	<0.0001*	<0.0001*
MA vs. OD	0.8033	0.9186	0.5972	0.0018*	0.2346	0.8888
OD
Mean	4.65	2.54	1.16	76.01	6.98	1.83
STD	2.18	2.48	0.37	8.23	0.96	0.83
N	55	55	58	60	59	59
TTESTb, P
OD vs. PCa	0.0002*	0.2290	0.0001*	0.0794	<0.0001*	<0.0001*
PCa
Mean	3.24	3.21	1.58	73.21	8.10	2.75
STD	1.77	3.35	0.69	9.28	1.07	0.72
N	61	61	61	64	62	63
TTESTb, P
MA vs. [OD+PCa]	0.0113*	0.5234	0.0031*	0.0100*	0.0636	0.0004*

Abbreviations: PCa: Death due to prostate cancer; OD: Death due to other causes; MA: Matched alive patients lived more than 5 years; RA: Randomly selected alive patients lived more than 5 years.

^a PSA levels in serum were measured at the time of diagnosis (before treatment).

^b TTEST analyses have been performed in two-tailed. P values are calculated within two groups, if P<0.05, this is marked with a star.