Table 1. Baseline characteristics of the included patients.

Characteristics	Disease-free			Relapse		P value
	Number	Percentage (%)		Number	Percentage (%)
Gender						0.23
Female	27	54		10	38.46
Male	23	46		16	61.54
Smoking status						0.45
Never	33	66		17	65.38
Former	10	20		3	11.54
Current	7	14		6	23.08
Stage						0.003
IA	16	32		3	11.54
IB	15	30		4	15.38
II	12	24		6	23.08
III	7	14		13	50
EGFR						0.09
Mutant	24	48		18	69.23
Wild-type	26	52		8	30.77