Table 4 Univariate and multivariate analyses of OS in MBC

Age ≤ 50

1.48(0.57–3.83)

0.42

Premenopausal

1.03(0.40–2.67)

0.96

T(T3 + T4)

5.37(1.80–19.71)

 < 0.01

2.39(0.48–11.95)

0.29

LN(positive)

6.15(2.27–16.67)

 < 0.01

3.70(1.03–13.34)

0.04

M(M1)

10.53(2.18–50.85)

 < 0.01

1.42(0.19–10.50)

0.73

AJCC stage(III + IV)

6.04(2.32–15.73)

 < 0.01

1.91(0.51–7.17)

0.34

Subtype(TN-MBC)

0.50(0.16–1.54)

0.22

Chemotherapy (yes)

1.78(0.24–13.56)

0.57

Radiotherapy (yes)

1.96(0.71–5.40)

0.19

endocrine therapy (yes)

1.25(0.17–9.53)

0.83

Operation (BCS)

0.63(0.14–2.74)

0.53

Operation (SLNB)

0.71(0.26–1.95)

0.51