Table 3.

Results of disease-free survival analysis by Cox proportional hazards model for the Ki67^Medium group

	Univariate				Multivariate
	HR	95%	CI	P value	HR	95%	CI	P value
Age (years)
35–50 vs < 35	0.865	0.110	6.797	0.891	0.872	0.098	7.723	0.902
51–65 vs < 35	0.938	0.115	7.675	0.952	1.218	0.130	11.454	0.863
> 65 vs < 35	0.994	0.090	11.048	0.996	0.605	0.028	13.007	0.748
pT
T2 vs T1	2.778	1.068	7.229	0.036	2.781	1.004	7.701	0.049
T3 vs T1	9.961	0.036	37.642	0.001	6.421	1.226	33.629	0.028
N
N1 vs N0	3.087	1.255	7.589	0.014	4.572	1.500	13.933	0.008
LVI
positive vs negative	2.476	0.979	6.263	0.048	1.434	0.517	3.977	0.488
Grade
III vs I/II	4.437	1.828	10.770	0.001	4.468	1.650	12.104	0.003
PgR(%)
< 20 vs ≥20	0.714	0.209	2.437	0.591	0.602	0.159	2.274	0.454
Surgery
Mastectomy vs BCS	2.455	1.001	6.020	0.050	0.452	0.108	1.890	0.277
Chemotherapy
No vs Yes	0.556	0.129	2.396	0.431	1.048	0.116	9.452	0.967
Radiotherapy
No vs Yes	2.042	0.830	5.021	0.120	8.786	1.779	43.388	0.008