Table 6.

Multivariate cox regression analyses for factors affecting overall survival rates.

Variable	Hazard ratio	95% CI	P value
Node positivity (positive vs negative)	2.3	1.2–4.4	0.012
Tumor size >2 cm (vs ≤2 cm)	1.9	1.0–3.9	0.058
Nuclear grade (high vs low&intermediate)	1.2	0.6–2.3	0.591
Histologic grade (high vs low&intermediate)	1.6	0.8–3.0	0.160
Lymphovascular invasion (positive vs negative)	1.6	0.8–3.0	0.160
Estrogen receptor (negative vs positive)	1.9	1.0–3.4	0.036
TLI (high vs low)	1.6	0.8–3.0	0.161