Table 2.

Cox regression analysis for disease-free survival in southern China.

Variables	Univariate analysis			Multivariate analysis
	Hazard ratio	95% confidence interval	P value	Hazard ratio	95% confidence interval	P value
Age	0.874	0.644–1.186	0.388	0.977	0.600–1.591	0.926
Tumour stage > 2 cm	0.894	0.652–1.227	0.488	1.257	0.793–1.990	0.330
Node-positive	1.108	0.850–1.446	0.448	1.116	0.754–1.653	0.584
Estrogen receptor-positive	1.109	0.846–1.454	0.453	1.154	0.660–2.017	0.615
Progesterone receptor-positive	1.116	0.852–1.463	0.426	1.122	0.662–1.904	0.669
HER2-positive	0.885	0.675–1.162	0.380	1.091	0.740–1.608	0.662
Ki-67 high expression	1.376	1.000–1.894	0.050	0.960	0.385–2.392	0.930
Mastectomy	0.934	0.521–1.673	0.818	0.985	0.650–1.492	0.943
Radiation therapy	1.016	0.770–1.342	0.910	0.889	0.596–1.326	0.564