Table 5.

Multivariate analysis for predictors of recurrence based on the Cox proportional hazards regression model after exclusion of patients >50 years old.

Variables	HR	95% Confidence interval	p
Age <35 years	1.8	1.17–2.81	0.008
Tumor size ≥ 2 cm	1.7	1.06–2.84	0.028
Lymph node-positive	4.2	2.64–6.82	<0.001
Nuclear grade 3	1.0	0.60–1.91	0.810
Histological grade 3	1.0	0.58–1.89	0.883
ER	1.1	0.71–1.78	0.625
PR	2.0	1.27–3.37	0.004
c-erbB2	1.4	0.97–2.21	0.069