Table 2.

Comparison of PD-L1 expression levels within ADC study group

Characteristic	PD-L1 expression
	TC					IC
	Negative (n, %)		Any+ (n, %)		P value	Negative (n, %)		Any+ (n, %)		P value
Age (years)					0.380					0.719
<58	43	67%	21	33%		40	63%	24	38%
≥58	43	60%	29	40%		48	67%	24	33%
Sex					<0.001					0.854
Male	45	52%	41	48%		55	64%	31	36%
Female	41	82%	9	18%		33	66%	17	34%
Smoking status					0.186					0.508
Never smoker	72	66%	37	34%		72	66%	37	34%
Smoker	14	52%	13	48%		16	59%	11	41%
Pathologic stage					0.586					0.098
IIIB	36	67%	18	33%		30	56%	24	44%
IV	50	61%	32	39%		58	71%	24	29%
Mutation status					0.049					0.475
EGFR mutant	43	74%	15	26%		38	66%	20	34%
KRAS mutant	11	65%	6	35%		13	76%	4	24%
Other	32	52%	29	48%		37	61%	24	39%