Table 2. Relationship between patient characteristics and EGFR mutation status.

	EGFR mutation positive (n=32)		EGFR mutation negative (n=85)
Characteristics	No. of Patients	%	No. of Patients	%	P
Sex
Male	11	34	50	59
Female	21	66	35	41	<0.02
Histology
Adenocarcinoma	31	97	66	78
Nonadenocarcinoma	1	3	19	22	=0.001
Smoking status
Never	21	66	31	36
Current/former	11	34	54	64	<0.001

EGFR=epidermal growth factor receptor.