Table 1.

Baseline characteristics of the study population.

	KRAS (N = 80)	Pan-Mutation Negative (N = 70)	p-value
Age at diagnosis (years)	62 (55.8 – 70)	61 (55 – 70)	0.976
Male	52%	73%	0.01
Female	48%	27%
Race
Caucasian	90%	84%	0.303
African American	10%	12%
Asian	0%	1%
Hispanic	0%	3%
Smoker (current or former)	96%	84%	0.012
Stage IV at diagnosis	83%	81%	0.798
Recurrent/Relapsed Disease	17%	19%
Histology
Adenocarcinoma	80%	60%	<0.001
Squamous	2%	27%
Poorly differentiated carcinoma	8%	10%
Large Cell	4%	1%
Adenosquamous	4%	1%
Other	2%	1%