Molecular Signature of Cancer at Gene Level or Pathway Level? Case Studies of Colorectal Cancer and Prostate Cancer Microarray Data

Table 1

Colorectal cancer gene expression datasets used in the meta-analysis.

Dataset	Platform	Total genes	Total samples	Experimental design		Statistical method
				Normal	Tumor
Hong	HGU133	54675	22	10	12	𝑡-test
Sabates-Bellver	HGU133	54675	64	32	32	Mann-Whitney test
Galamb1	HGU133	54675	30	11	19	SAM
Galamb2	HGU133	54675	38	8	30	PAM
Graudens	cDNA	23232	30	12	18	z-statistics

SAM: significance analysis of microarrays; PAM: prediction analysis of microarrays.