Table 4.

Contribution of various potential prognostic factors to overall survival by Cox regression analysis in early breast cancer patients receiving epirubicin‐based adjuvant chemotherapy

Variable	Hazard ratio	95% confidence interval	P‐value
Nodes status†	5.130	1.063–24.754	0.041
Estrogen receptor status‡	1.017	0.317–3.259	0.97
Progesterone receptor status‡	0.406	0.121–1.358	0.14
Grading§	4.058	0.870–18.923	0.07
Cyclin E¶	1.439	0.484–4.275	0.51

^† The risk ratio is given as node‐positive versus node‐negative.

^‡ The risk ratio is given as negative versus positive tumors.

^§ The risk ratio is given as G3 versus G2 tumors.

^¶ The risk ratio is given as high‐ versus low‐expressing tumors.