Table 1.

Patients’ characteristics and relevance of EGFR mutation

Variables	Number	EGFR mutation (%)	P‐values
Sex
Female	365	198 (54.2)	<0.0001
Male	636	116 (18.2)
Smoking history
Never	375	223 (59.5)	<0.0001
Ever	626	91 (14.5)
Histology
Ad	779	308 (39.5)	<0.0001
Non‐Ad	222	6 (2.7)

Ad, adenocarcinoma; EGFR, epidermal growth factor receptor.