Table 1.

Clinical characteristics of lung adenocarcinoma from multiple cohorts.

Variables	TCGA N = 500	GSE30219 N = 83	GSE3141 N = 58	GSE50081 N = 127	GSE26939 N = 115	GSE72094 N = 398	GSE31210 N = 226
Age (year)
Median	66	60	–	70	65	70	61
Range	33–88	44–84	–	40–86	41–90	64–77	30–76
Gender
Male	230	65	–	65	53	176	105
Female	270	18	–	62	62	222	121
Smoking
Yes	415	–	–	92	100	300	111
No	71	–	–	23	12	31	115
NA	14	–	–	12	3	67	0
TNM stage
I and II	387	83	–	127	71	321	226
III and IV	105	0	–	0	16	72	0
NA	8	0	–	0	28	5	0
OS Status
Alive	318	40	26	76	49	285	191
Death	182	43	32	51	66	113	35

NA, not available; OS, overall survival.