Table 1.

Characteristics of breast cancer patients who participated in this study (n = 39; median age at diagnosis, 51 years)

Covariates	Number of samples
T stage
1	17
2	13
3	8
4	1
N stage
0	20
1	16
2	1
3	2
Unknown	1
Estrogen receptor status
Positive	20
Negative	19
HER2 status
Positive	19
Negative	20
Histological grade
I	11
II	10
III	17
Adjuvant chemotherapy
Yes	32
No	7
Adjuvant endocrine therapy
Yes	21
No	18