Table 1 Demographic and clinical characteristics of patients with and without recurrence or metastasis

Age (years)

50.8 ± 12.8 (13.0-77.0)

52.2 ± 12.4 (15.0-81.0)

0.510

Tumor size (cm)

3.2 ± 1.9 (1.2-9.5)

3.0 ± 1.6 (0.4-8.2)

0.437

Lymph node involvement

45 (80.4%)

70 (76.9%)

0.624

TNM stages

I

5 (8.9%)

9 (9.9%)

0.511

II

24 (42.9%)

32 (35.2%)

III

27 (48.2%)

49 (53.8%)

IV

0 (0.0%)

1 (1.1%)

ER expression

26 (46.4%)

31 (34.1%)

0.168

PR expression

28 (50.0%)

36 (39.6%)

0.266

Her2 expression

29 (51.8%)

41 (45.1%)

0.471

Basal-like feature^*

9 (16.1%)

30 (33.0%)

0.018

Recurrence

40 (44.0%)

Metastasis

Skin

2 (2.2%)

Lung

20 (22.0%)

Liver

8 (8.8%)

Bones

11 (12.1%)

Brain

5 (5.5%)

Others

5 (5.5%)