Table I.

Patient characteristics according to tumoral CD155 status.

		Tumoral CD155 expression
Variables	Total	Positive	Negative	P-value
All patients, n (%)	96	37 (38.5)	59 (61.5)
Age, years
Median	72	73	70	0.232
Range	40-88	45-86	40-88
Sex, n (%)
Male	54	25 (46.3)	29 (53.7)	0.093
Female	42	12 (28.6)	30 (71.4)
Smoking, n (%)
Former or current	55	27 (49.1)	28 (50.9)	0.019
Never	41	10 (24.4)	31 (75.6)
Cell differentiation, n (%)
Well	51	13 (25.5)	38 (74.5)	0.005
Moderately or poorly	33	19 (57.6)	14 (42.4)
Tumor size, n (%)
>2 cm	54	29 (53.7)	25 (46.3)	<0.001
≤2 cm	42	8 (19.0)	34 (81.0)
Lympho-vascular invasion, n (%)
Yes	23	12 (52.2)	11 (47.8)	0.302
No	47	17 (36.2)	30 (63.8)
Vascular invasion, n (%)
Yes	15	11 (73.3)	4 (26.7)	0.007
None	58	19 (32.8)	39 (67.2)
Pleural invasion, n (%)
Yes	14	9 (64.3)	5 (35.7)	0.040
None	82	28 (34.1)	54 (65.9)
Pathologic stage, n (%)
IA	69	16 (23.2)	53 (76.8)	<0.001
IB	27	21 (77.8)	6 (22.2)
Tumoral PD-L1 expression, n (%)
Positive	14	9 (64.2)	5 (35.7)	0.041
Negative	82	28 (34.1)	54 (65.9)

PD-L1, programmed death-ligand 1.