Table 1.

The clinical characteristics of LUAD patients

Variables	Group	Total set (n = 497)	Training set (n = 331)	Test set (n = 166)	P value
Vital status	Alive	317	206	111	0.36
	Dead	180	125	55
Survival time		911.24	898.1	937.43	0.66
Clinical stage	I	267	187	80	0.17
	II	118	75	43
	III	80	48	32
	IV	25	17	8
	NA	7	4	3
T stage	T1-T2	433	288	145	0.64
	T3-T4	61	43	18
	NA	3	0	3
N stage	N0	321	223	98	0.11
	N1-N3	165	102	63
	NA	11	6	5
M stage	M0	331	226	105	0.97
	M1	24	17	7
	NA	142	88	54
Age	< 65	218	142	76	0.61
	≥ 65	279	189	90

NA not available

Patients with not available data were excluded in statistical analysis