Table 1.

Clinicopathologic Variables and QC Characteristics of Samples and Tissue Types

Variables/characteristics	Biopsy			Radical prostatectomy			Total
Contralateral	Adjacent	Tumor	Contralateral	Adjacent	Tumor
Sample storage age, mean (SD), years	3.29 (2.69)			3.06 (2.69)
Available tissue	24	24	33	23	23	31	158
Clinicopathological
Tumor content, %
Median	0	0	70	0	0	80
Range	0–0	0–0	10–90	0–0	0–0	50–90
Stromal content, %
Median	60	60	25	60	60	20
Range	40–80	40–80	10–80	10–80	40–80	5–50
Gleason score
6	0	0	13	0	0	10	23
7	0	0	14	0	0	16	30
8	0	0	4	0	0	4	8
9	0	0	2	0	0	2	4
Quality control
Successful RNA extraction	23	22	27	23	23	31	149
Failed RNA extraction	1	2	6	0	0	0
Median RNA yield, ng	463.28	283.74	278.25	2814.3	2319.04	2846.7
Successful cDNA amplification	23	22	27	22	23	31	148
Failed cDNA extraction	0	0	0	1	0	0
Median cDNA yield, ng	7474.68	6984.275	7066.44	6704.88	7011.2	6461.91
Array good QC	23	22	26	22	23	31	147
Median % present	54.34	51.16	48.65	46.91	51.03	49.44

The array quality is equivalent across tissue types and samples.

QC, quality control.