TABLE 1.

The general statistic for the datasets analyzed. Stages I to IV are the tumor stages defined by the AJCC staging system (Edge and Compton, 2010).

	TCGA lung cancer data set	GSE37745 data set
Number of samples included	471	195
Median age	68	65
Median age survived after 5 years	68	63
Median age dead after 5 years	68	66
Number of samples with stage I or stage IA	88	40
Number of samples with stage IB	129	89
Number of samples with stage II or stage IIA	48	6
Number of samples with stage IIB	84	29
Number of samples with stage III or stage IIIA	84	21
Number of samples with stage IIIB	17	6
Number of samples with stage IV	21	4
Percentage of over 5 year OS	26.1%	41.5%
Percentage of failed 5 year OS	73.9%	58.5%