Table 1.

PD‐L1 or PD‐L2 expression and clinicopathological factors

	PD‐L1				PD‐L2
	<1%	1%‐49%	≥50%	P	<1%	1%‐49%	≥50%	P
Age
<65	49	12	7	.2858	36	13	19	.5265
≥65	120	35	8		73	37	53
Gender
Male	79	26	10	.2334	62	22	31	.1244
Female	90	21	5		47	28	41
Smoking
Ever	78	27	10	.1568	62	21	32	.1207
Never	91	20	5		47	29	40
EGFR
Mutation	86	17	3	.0648	40	25	41	.0217
Wild type	71	27	11		63	19	27
Unknown	12	3	1		6	6	4
Grade
1	101	16	4	.0009	53	30	38	.4096
2‐3	68	31	11		56	20	34
pStage
0‐I	139	32	7	.0019	74	42	62	.0071
II‐VI	30	15	8		35	8	10

Chi‐squared test (Fisher's exact test) was performed. Italics indicates statistical significance.