Table 2 The 10-year overall survival rates and univariate Cox regression analysis
Factors | overall survival rates | Hazard ratio | Â | Log-rank test p-value | |
|---|---|---|---|---|---|
| Â | 10-year (%) | 95% CIa | Â | 95% CI a | Â |
Age | Â | Â | Â | Â | Â |
   < 35 | 69.6 | 57.7–81.5 | 1.00 | - | 0.30 |
   35–54 | 78.1 | 75.2–81.0 | 0.69 | 0.30–1.59 |  |
   ≥ 55 | 73.4 | 69.9–77.0 | 0.90 | 0.39–2.08 |  |
cTNM | Â | Â | Â | Â | Â |
   Stage I | 85.7 | 81.3–90.0 | 1.00 | - | <0.001 |
   Stage II | 75.8 | 73.1–78.5 | 2.32 | 1.31–4.09 |  |
   Stage III | 54.5 | 46.9–62.0 | 4.85 | 2.55–9.22 |  |
pTNM | Â | Â | Â | Â | Â |
   Stage I | 89.4 | 85.8–93.1 | 1.00 | - | <0.001 |
   Stage II | 81.7 | 79.1–84.4 | 2.10 | 1.10–4.03 |  |
   Stage III | 46.4 | 40.8–51.9 | 7.77 | 4.08–14.81 |  |
pN | Â | Â | Â | Â | Â |
   pN0 | 86.7 | 84.2–89.1 | 1.00 | - | <0.001 |
   pN1 | 76.4 | 72.1–80.7 | 1.74 | 1.08–2.82 |  |
   pN2 | 46.6 | 39.7–53.4 | 5.25 | 3.34–8.27 |  |
   pN3 | 38.2 | 26.9–49.5 | 5.34 | 3.01–9.47 |  |
ER status | Â | Â | Â | Â | Â |
   Negative | 71.0 | 67.7–74.3 | 1.00 | - | 0.012 |
   Positive | 79.5 | 76.5–82.5 | 0.63 | 0.44–0.91 |  |
Breast surgery | Â | Â | Â | Â | Â |
   Breast conserving surgery | 76.1 | 71.2–81.0 | 1.00 | - | 0.093 |
   Modified radical mastectomy | 76.2 | 73.7–78.7 | 1.31 | 0.84–2.04 |  |
   Standard radical mastectomy | 19.1 | 2.29–35.8 | 4.09 | 1.57–10.64 |  |