Table 1 Patients characteristics, (n = 553)

Gender

Female

97.8%

Male

2.2%

Age group (years)

65–69

48.8%

70–74

29.3%

75–79

14.6%

≥ 80

7.2%

Histology

IDC

83.2%

ILC

10.8%

Others^c

6.0%

Tumor Size (T)^a

Tis

T1

0.23%

26.0%

T2

52.2%

T3

10.9%

T4

3.0%

Tx

7.5%

Axillary nodal metastasis^a

Negative

40.5%

Positive

55.6%

Unknown

3.9%

Stage

I

13.4%

II

19.7%

III

43.6%

IV

20.6%

NA

2.7%

Grade^a

I

8.7%

II

51.5%

III

38.7%

NA

1.1%

Lymphovascular invasion (LVI)^a

Unidentified Negative

Identified Unknown

47.0%

39.4%

14.1%

Progesterone Receptors (PR)

Negative

18.8%

Positive

79.7%

Unknown

1.4%

Estrogen Receptors (ER)

Negative

15.7%

Positive

82.8%

Unknown

1.4%

HER2-neu^b

Negative

81.6%

Positive

18.4%

Unknown

9.4%