Table 4. Univariate and multivariate analysis of overall survival in young breast cancer patients.

Covariates	Univariate analysis		Multivariate analysis
HR (95%CI)	P	HR (95%CI)	P
Family history of breast cancer
No	1.000		—
Yes	1.670 (0.232–11.999)	0.610
T of TNM staging
T1/T2	1.000		1.000
T3/T4	3.219 (2.009–5.159)	<0.001	1.686 (1.006–2.823)	0.047
Node status
Negative	1.000		1.000
Positive	7.507 (3.450–16.333)	<0.001	8.748 (3.135–24.408)	<0.001
ER status
Negative	1.000		1.000
Positive	0.588 (0.369–0.938)	0.026	0.485 (0.290–0.811)	0.006
BRCA1 nuclear status
Negative	1.000		—
Positive	0.851 (0.309–2.342)	0.851