Table 2.

Clinicopathological classification of primary PDAC by CLDN18.2 expression characteristics.

			CLDN18.2
	Score 0		Score 1		Score 2		Score 3		P value
	n	%	n	%	n	%	n	%
Age
<60	7	43.8	4	25	3	18.8	2	12.5	.479
≥60	24	46.2	17	32.7	8	15.4	3	5.8
Gender
Male	20	64.5	18	85.7	9	81.8	4	80	.185
Female	11	35.5	3	14.3	2	18.2	1	20
Grade
G1	16	51.6	9	42.9	4	36.4	2	40	.633
G2	12	38.7	10	47.6	6	54.5	3	60
G3	3	9.7	2	9.5	1	9.1	0	0
Localization
Head	21	67.7	16	76.2	9	81.8	5	100	.067
Body	5	16.1	3	14.3	2	18.2	0	0
Tail	5	16.1	2	9.5	0	0	0	0
Tumor stage
1B	8	25.8	3	14.3	4	36.4	2	40	.731
1C	4	12.9	0	0	1	9.1	0	0
2	9	29	9	42.9	4	36.4	2	40
3	10	32.3	9	42.9	2	18.2	1	20
Node stage
0	13	41.9	9	42.9	5	45.5	0	0	.579
1	10	32.3	7	33.3	5	45.5	3	60
2	8	25.8	5	23.8	1	9.1	2	40
Clinical stage
IA	6	19.4	3	14.3	4	36.4	0	0	.645
IB	4	12.9	4	19	1	9.1	0	0
IIA	3	9.7	2	9.5	0	0	0	0
IIB	10	32.3	7	33.3	5	45.5	3	60
III	8	25.8	5	23.8	1	9.1	2	40
PNI
Yes	24	77.4	13	61.9	8	72.7	3	60	.41
No	7	22.6	8	38.1	3	27.3	2	40
LVI
Yes	17	54.8	12	57.1	6	54.5	4	80	.48
No	14	45.2	9	42.9	5	45.5	1	20
Necrosis
Yes	4	12.9	3	18.2	2	18.2	0	0	.799
No	27	87.1	18	81.8	9	81.8	5	100
Exitus
Yes	24	82.8	17	81	8	80	3	60	.361
No	5	17.2	4	19	2	20	2	40

CLDN18.2 = claudin 18.2, LVI = lymphovascular invasion, PDAC = pancreatic ductal adenocarcinoma, PNI = perineural invasion.