Table 2.

Description of the six microarray datasets used.

Cancer Type	Number of samples	Number of Metastatic samples	Affymetrix Platform	Number of probesets	Number of genes
Cervical	33	12	HG-U133 P2	5,4675	20,271
Prostate	90	25	HG-U95Av2	1,2625	9,000
Gastric	22	15	Hu6800	7,129	5,526
Colon	6	3	HG-U133A	22,283	13,069
OSCC*	27	19	HG-U133A	22,283	13,069
RCC#	32	10	HG-U133A	22,283	13,069

Raw data were downloaded from the NCBI GEO database. *OSCC = oral squamous cell carcinoma; ^#RCC = renal cell carcinoma