Table 4.

Allele and genotype frequencies of PD-L1 A8293C in patients with NSCLC according to clinicopathologic characteristics

	Total (n)	AA	AC	CC	A	C
Gender
Male	352	280	70	2
Female	176	136	36	4
Smoking status
Nonsmokers	210	173	37	-	383 (91.2)	37 (8.8)
Smokers	318	243	69	6	555 (87.3)	81 (12.7)*
Nodal stage
N0	112	106	6	-	218 (97.3%)	6 (2.7%)
N1~N3	416	310	100	6	720 (86.5%)	112 (13.5%)**

^*OR=1.51, 95% CI=1.00-2.28, P<0.05;

^**OR=5.65, 95% CI=2.45-13.03, P<0.001.