Table 3 Factors associated with disease-free survival on the Cox proportional hazards model

Age, years

0.451

 ≥ 40

1.00 (reference)

 < 40

1.58 (0.48–5.13)

Ki-67

0.426

 < 14

1.00 (reference)

 ≥ 14

1.62 (0.50–5.26)

Hormonal therapy

0.011

0.639

 Yes

1.00 (reference)

1.00 (reference)

 No

2.31 (1.21–4.44)

1.31 (0.43–3.97)

HER2-targeted agent

0.570

 Yes

1.00 (reference)

 No

1.75 (0.62–4.95)

Adjuvant chemotherapy

0.014

0.051

 Yes

1.00 (reference)

1.00 (reference)

 No

3.28 (1.27–8.45)

2.58 (0.99–6.68)

TNM stage

0.109

 IIA

1.00 (reference)

 IIB

1.71 (0.89–3.30)

Pathologic prognostic stage

0.046

0.324

 I

1.00 (reference)

1.00 (reference)

 II

1.68 (0.84–3.37)

0.99 (0.33–2.98)

 III

3.82 (1.39–10.51)

2.19 (0.50–9.66)

SUVmax

0.004

0.948

 ≤ 12.8

1.00 (reference)

1.00 (reference)

 > 12.8

3.03 (1.43–6.43)

1.04 (0.34–3.16)

SUVpeak

<  0.001

0.007

 ≤ 8.2

1.00 (reference)

1.00 (reference)

 > 8.2

3.46 (1.78–6.74)

2.58 (1.29–5.15)

TLR

0.012

0.078

 ≤ 2.1

1.00 (reference)

1.00 (reference)

 > 2.1

3.81 (1.35–10.77)

2.65 (0.90–7.82)

MTV (cm³)

0.001

0.241

 ≤ 5.1

1.00 (reference)

1.00 (reference)

 > 5.1

3.10 (1.63–5.93)

1.60 (0.73–3.49)