Table 1.

Clinical characteristics of patients in training and validation sets

Clinical features	TCGA-LUAD	GSE31210	GSE30219	GSE50081	GSE13213	GSE19188	GSE41271
OS
0	318	191	40	76	68	16	112
1	182	35	43	51	49	24	70
T stage
T1	167		69	43
T2	267		12	82
T3	45		2	2
T4	18
TX	3
N stage
N0	324		80	94
N1	94		3	33
N2	69
N3	2
NX	11
M stage
M0	332		83	127
M1	24
MX	144
Stage
I	268	168		92	79		101
II	119	58		35	13		28
III	80				25		49
IV	25						4
X	8
Gender
Male	230	121	65		60	25	92
Female	270	105	18		57	15	90
Age
≤ 65	237	176	60	40	78
> 65	253	50	23	87	39
NA	10
Smoking
1	71
2	119
3	129
4	163
5	4
7	14

Annotation: Lifelong non-smoker (less than 100 cigarettes smoked in lifetime) = 1; current smoker (includes daily smokers and non-daily smokers or occasional smokers) = 2; current reformed smoker for > 15 years (greater than 15 years) = 3; current reformed smoker for ≤ 15 years (less than or equal to 15 years) = 4; current reformed smoker, duration not specified = 5; smoking history not documented = 7