Expression of PD-1 on CD4⁺ Tumor-Infiltrating Lymphocytes in Tumor Microenvironment Associated with Pathological Characteristics of Breast Cancer

Table 1

The characteristics of patients.

Items
Age, mean ± SD	57.8 ± 13.6
Histological grade, (%)
I	14 (11.3)
II	82 (66.1)
III	28 (22.6)
Vascular invasion, (%)
No	86 (67.7)
Yes	41 (32.3)
Nerve invasion, (%)
No	101 (82.1)
Yes	22 (17.3)
Axillary lymph node metastasis, (%)
No	22 (45.8)
Yes	26 (54.2)
E-cadherin expression, (%)
No	6 (5.1)
Yes	112 (94.9)
Ki-67 index, mean ± SD	30% ± 25%
CK20 expression, (%)
No	56 (91.8)
Yes	5 (8.2)
CK7 expression, (%)
No	9 (13.2)
Yes	59 (86.8)