Table 4. Univariate and multivariate Cox proportional hazards regression analyses on the factors associated with recurrent free survival in breast cancer.
| Factors | Univariate | Multivariate | ||||
|---|---|---|---|---|---|---|
| HR | 95% CI | P values | HR | 95% CI | P values | |
| Age | 0.95 | 0.90–1.00 | 0.055 | 0.94 | 0.88–1.00 | 0.061 |
| Tumor size | 1.37 | 1.09–1.72 | 0.007 | 1.08 | 0.82–1.42 | 0.601 |
| Lymph node stage (N0 vs. N1 vs. N2 vs. N3) | 2.64 | 1.64–4.23 | < 0.001 | 2.31 | 1.35–3.94 | 0.002 |
| Nuclear grade (1 vs. 2 vs. 3) | 2.06 | 1.21–3.48 | 0.007 | 1.47 | 0.85–2.54 | 0.164 |
| SAA in tumor cell (− vs. +) | 3.06 | 0.97–9.67 | 0.057 | 1.97 | 0.66–5.88 | 0.227 |
| SAA+ macrophage (− vs. + vs. ++) | 3.34 | 1.49–7.48 | 0.003 | 2.33 | 1.02–5.33 | 0.046 |
| CD68+ macrophage (− vs. + vs. ++) | 3.56 | 1.21–10.52 | 0.021 | 1.12 | 0.26–4.79 | 0.882 |
Note: SAA: serum amyloid A; vs.: versus. Lymph node stage: N0, indicates no lymph node metastasis; N1, 1–3 lymph node metastasis; N2, 4–9 lymph node metastasis; N3, ≥ 10 lymph node metastasis.