Table 3.

Uni and multivariate COX regression analysis of survival in women with breast cancer (n = 2,715)

	Univariate Analysis			Multivariate Analysis
Age (y)	P-value	HR	95% CI	P-value	HR	95% CI
< 40	0.111	1.29	0.94–1.78	0.339	1.17	0.85–1.61
40 to 49	0.037	0.74	0.56–0.98	0.033	0.74	0.56–0.98
50 to 59	-	1.00	-	-	1.00	-
60 to 69	0.273	1.15	0.90–1.46	0.127	1.21	0.95–1.54
70 to 79	< 0.001	2.02	1.59–2.56	< 0.001	2.27	1.79–2.88
≥ 80	< 0.001	4.09	3.20–5.22	< 0.001	4.16	3.24–5.33
	Univariate Analysis			Multivariate Analysis
Stage	P-value	HR	95% CI	P-value	HR	95% CI
Stage 0	0.049	0.61	0.37–0.99	0.101	0.66	0.41–1.08
Stage I	-	1.00	-	-	1.00	-
Stage II	0.057	1.39	0.99–1.96	0.016	1.53	1.08–2.15
Stage III	< 0.001	3.72	2.70–5.12	< 0.001	4.05	2.94–5.59
Stage IV	< 0.001	8.00	5.99–10.68	< 0.001	8.57	6.41–11.45
Unknown	< 0.001	2.29	1.69–3.10	< 0.001	2.08	1.54–2.82

H.R. Hazard Ratio, 95% CI 95% Confidence Interval. Variables were selected by Stepwise Criteria