Table 1.

Clinicopathologic features of patients with NSCLC with mutant or wild-type EGFR

Variable	Mutant EGFR (n = 29)	Wild-type EGFR (n = 15)	χ2	P
Gender
Male	14	12	2.908	0.088
Female	15	3
Age, y
< 60	12	6	0.008	0.930
≥ 60	17	9
Smoking status
Never-smoker	14	4	1.120	0.290
Current/former smoker	15	11
Stage
IIIB	8	5	0.157	0.692
IV	21	10
ECOG score
0~1	19	8	0.619	0.431
2~3	10	7
Serum COX-2 level
< 100 ng/mL	16	14	4.994	0.025
≥ 100 ng/mL	13	1