Table 2. Comparison of clinicopathologic features among patients harboring different genes.

Variables	ALK	ROS1	Wild type	P (ALK vs. wild)	P (ROS1 vs. wild)
Gender				0.19	0.39
Male	42	15	334
Female	47	17	277
Age at diagnosis (years)				0.08	0.65
<60	58	19	338
≥60	31	13	273
Smoking history				<0.001	0.0002
Yes	19	5	299
No	70	27	312
Histology				0.006	0.015
Solid predominant	18	8	66
Non-solid predominant	56	20	460
Stage at diagnosis				0.14	0.55
I–IIIA	67	20	413
IIIB/IV	22	12	198
TTF1				0.01	0.035
Positive	70	26	413
Negative	5	0	90
Napsin A				0.04	0.25
Positive	76	28	443
Negative	2	0	52
P63				0.32	0.57
Positive	1	0	24
Negative	64	21	435
CK5/6				0.39	0.40
Positive	2	0	29
Negative	72	26	462