Table 2.

Baseline clinical characteristics of Japanese and LAC patient cohorts

	Japanese (N = 169)		LAC (N = 172)		P-valuea
	N	%	N	%
Gender
Male	109	64	115	67	0.65
Female	60	36	57	33
Age (year)
Median (range)	67 (31–88)		61 (26–74)		< 0.001
< 65	65	38	101	59	< 0.001
⩾ 65	104	62	71	41
Stage
I – II	81	48	84	49	0.34
III–IV	88	52	74	43
Unknownb			14	8
T-category
T1 – T2	78	46	54	31	0.017
T3 – T4	91	54	108	63
Unknownb			10	6
N-category
N0 – N1	121	72	82	48	0.003
N2 – N3	48	28	66	38
Unknownb			24	14
Primary tumor site
Proximal	46	27	77	45	< 0.001
Distal	123	73	95	55
Tumor differentiation
Differentiated	68	40	44	26	0.018
Undifferentiated	101	60	114	66
Unknownb			14	8
Ethnicity
Asian	169	100	30	17	NA
Caucasian			90	52
Hispanic			38	22
African American			14	8

^aBased on χ²-test or Wilcoxon test, whichever was appropriate.

^bExcluded in χ²-test.