Table 2.

Patient characteristics by KRAS mutation status.

	KRAS mutations (n = 11)		Wild type (n = 106)		P
	No	%	No	%
Mean age at diagnosis	60		60		P = 0.98*
Sex
Male	10	(91%)	67	(63%)	P = 0.06**
Female	1	(9%)	39	(37%)
Smoking history
Ever	9	(82%)	59	(56%)	P = 0.08**
Never	2	(18%)	47	(44%)

*P value calculated by t-test.

**P value calculated by Fisher's exact test.