Table 6.

Results from multivariable Cox proportional hazards model reveals significant parameters assessing influence of de novo status, age at diagnosis, and ER status of primary tumor on overall survival (OS).

Parameter	OS
	P-value	95% CI	Hazard Ratio
De novo Status	0.002	1.36, 3.81	2.27
Age at Dx	0.001	1.01, 1.05	1.03
ER primary, n = 160 (ref = negative)	0.005	0.21, 0.75	0.39