Table 1.

Correlations between B7-H1, B7-H3, and B7-H4 expressions and patient pathological parameters

Pathological parameters	Cases	B7-H1 expression		P-value	B7-H3 expression		P-value	B7-H4 expression		P-value
		Low	High		Low	High		Low	High
Sex
Male	41	26	15	0.06	12	29	0.58	18	23	0.19
Female	22	13	9		8	14		14	8
Age (years)
≥60	41	29	12	0.06	18	23	0.44	24	17	0.12
<60	22	10	12		12	10		8	14
Location
Head	35	21	14	0.91	14	21	0.29	20	15	0.1
Body	13	8	5		3	10		8	5
Tail	15	10	5		3	12		4	11
Tumor size (cm)
≤5	25	11	14	0.03	5	20	0.17	6	19	<0.01
>5	38	28	10		15	23		26	12
Differentiation
Low	36	21	15	0.75	10	26	0.05	18	18	0.83
Moderate	22	15	7		6	16		12	10
High	5	3	2		4	1		2	3
Tumor (T) statusa
pT1	5	5	0	0.11	2	3	0.58	2	3	<0.01
pT2	19	14	5		8	11		13	6
pT3	25	13	12		7	18		16	9
pT4	14	7	7		3	11		1	13
Nodal (N) statusb
N0	26	16	10	1	13	13	0.01	18	8	0.02
N1	37	23	14		7	30		14	23
Distant metastasis (M)c
M0	33	23	10	0.21	9	24	0.59	20	13	0.13
M1	30	16	14		11	19		12	18

Notes:

^aThe depth of tumor invasion is classified as follows: pT₁, invasion of lamina propria or submucosa; pT₂, invasion of muscularis propria; pT₃, invasion of adventitia; and pT₄, invasion of adjacent structures

^blymph-node metastasis is classified as follows: N₀, no regional lymph-node metastasis; N₁, regional lymph-node metastasis

^cdistant metastasis is classified as follows: M₀, no distant metastasis; M₁, metastasis to cervical nodes, celiac nodes, and other distant metastases. P<0.05 was considered significant.