Table 1. Patient characteristics.

		TT		TG/GG		P-value
		N	%	N	%
Patients		145	82.4	31	17.6
Age	Median(quartile)	66.0 (58.8–71.4)		70.0 (60.9–73.3)		0.119
Sex	Male	97	66.9	23	74.2	0.430
	Female	48	33.1	8	25.8
ECOG-PS	0	69	47.6	18	58.1	0.241
	1	66	45.5	12	38.7
	2	10	6.9	1	3.2
Smoking	Never	32	22.1	9	29.0	0.407
	Ex smokers/smokers	113	77.9	22	71.0
Stage at diagnosis	I	14	9.7	2	6.5	0.852
	IIA	4	2.8	3	9.7
	IIB	5	3.5	2	6.5
	IIIA	25	17.2	4	12.9
	IIIB	16	11.0	3	9.7
	IIIB wet	6	4.1	0	0.0
	IV	75	51.7	17	54.8
Grading	G1	5	5.3	2	10.0	0.933
	G2	36	37.9	5	25.0
	G3	52	54.7	13	65.0
	Undifferentiated	2	2.1	0	0.0
	unknown	50		11
Histotype	Adenocarcinoma	100	69.0	23	74.2	0.640
	Squamous	34	23.5	7	22.6
	Bronchoalveolar	2	1.4	1	3.2
	Large cells	2	1.4	0	0.0
	Other	7	4.9	0	0.0
KRAS status	Wild type	113	77.9	20	66.7	0.190
	Mutated	32	22.1	10	33.3
Treatment arm	Docetaxel	70	48.3	16	51.6	0.737
	Erlotinib	75	51.7	15	48.4