Table 1 Summary statistics of the Cox regression analysis and stepwise backward selection.

Immune clusters

 Cluster B vs Clusters A–C

0.38 (0.24–0.61)

0.72 (0.59–0.88)

0.63 (0.37–1.05)

0.47 (0.32–0.7)

0.47 (0.22–1)

0.51 (0.29–0.88)

0.34 (0.16–0.7)

0.65 (0.47–0.92)

0.57 (0.33–1.01)

0.22 (0.09–0.54)

0.55 (0.24–1.24)

<0.0001

0.001

0.078

<0.0001

0.049

0.02

0.004

0.014

0.053

0.001

0.151

ER status

 ER neg vs ER pos

0.54 (0.33–0.89)

2.37 (1.04–5.36)

0.015

0.039

PAM50

 Basal-like vs Her2

1.14 (0.86–1.5)

2.29 (1.02–5.1)

0.9 (0.49–1.65)

1.67 (0.6–4.67)

0.43 (0.14–1.35)

0.84 (0.46–1.53)

1.7 (0.72–4.03)

2 (0.66–6.07)

0.370

0.044

0.726

0.326

0.147

0.572

0.227

0.222

 Basal-like vs LumA

0.41 (0.31–0.54)

0.81 (0.34–1.93)

0.63 (0.37–1.08)

0.26 (0.09–0.78)

0.19 (0.07–0.5)

0.39 (0.25–0.61)

0.4 (0.16–1.04)

0.62 (0.14–2.68)

<0.0001

0.636

0.093

0.016

0.001

<0.0001

0.061

0.526

 Basal-like vs LumB

0.92 (0.72–1.19)

1.58 (0.71–3.53)

1.39 (0.85–2.26)

1.19 (0.53–2.68)

0.46 (0.19–1.1)

0.95 (0.64–1.41)

0.97 (0.38–2.5)

1.18 (0.42–3.33)

0.529

0.262

0.188

0.673

0.081

0.792

0.953

0.750

 Basal-like vs Normal

0.72 (0.5–1.04)

2.69 (1–7.22)

0.25 (0.06–1.06)

0.16 (0.02–1.28)

0.54 (0.18–1.63)

0.07 (0.01–0.48)

0.62 (0.2–1.89)

7.58 (0.86–66.95)

0.079

0.050

0.060

0.084

0.275

0.007

0.400

0.068

Lymph node status

 Node neg vs Node pos

2.15 (1.74–2.65)

2.59 (1.51–4.46)

1.64 (1.2–2.23)

1.35 (0.63–2.92)

<0.0001

<0.0001

0.002

0.443

Stage

 Stage 1 vs Stage 2

1.83 (0.91–3.69)

0.73 (0.58–0.92)

0.088

0.008

 Stage 1 vs Stage 3

2.2 (1.05–4.63)

1.38 (0.97–1.96)

0.037

0.073

 Stage 1 vs Stage 4

5.68 (2.18–14.82)

3.09 (1.43–6.68)

<0.0001

0.004

Age

 Continuous variable

1.03 (1.02–1.05

<0.0001

Tumor size

 Continuous variable

1.01 (1–1.01)

1.53 (1.24–1.89)

1.01 (1–1.02)

0.86 (0.68–1.09)

1.09 (0.89–1.33)

<0.0001

<0.0001

0.040

0.209

0.406