Table 1.

Patient and Sample Characteristics.

Characteristics	Patients (N = 116)*
Age, years (n = 115)
Median (interquartile range)	53.0 (45.5–64.5)
Distribution
≤40	15 (13)
41–50	40 (35)
51–60	20 (17)
61–70	23 (20)
>70	17 (15)
Pathologic stage (n = 112)
I	33 (29)
II	57 (51)
III	19 (17)
IV	3 (3)
Histologic grade of tumor (n = 113)
Low	17 (15)
Intermediate	60 (53)
High	36 (32)
Estrogen receptor expression (n = 114)
Negative	32 (28)
Positive	82 (72)
Progesterone receptor expression (n = 114)
Negative	51 (45)
Positive	63 (55)
Human epidermal growth factor 2 receptor expression
Negative	78 (73)
Positive	29 (27)
Immunohistochemical classification (n = 107)
HR + /HER2-	64 (60)
HR + /HER2+	13 (12)
HER2+	16 (15)
TNBC	14 (13)

HR hormone receptor, HER2 human epidermal growth factor 2 receptor, TNBC triple-negative breast cancer.

*All values are presented as n (%) unless otherwise indicated.