Table 3.

Association between EGFR mutation status and clinicopathological features

	Tumor tissue		P	Plasma		P
	Mutation	Wild-type		Mutation	Wild-type
Total	38	56		19	75
Age (years)			0.666			0.603
≤60	20	36		14	42
>60	18	19		5	32
Gender			0.013			0.21
Male	19	42		10	51
Female	19	14		9	24
Smoking history			<0.001			0.001
Smoker	10	38		6	42
Never smoker	28	18		13	33
Tumor type			0.001			0.007
adenocarcinoma	36	36		19	53
Non-adenocarcinoma	2	20		0	22
Tumor stage			0.327			0.093
II-III	4	10		0	14
IV	34	46		19	61