Table 5.

Multivariate analysis (model I) of survival (overall survival) for breast cancer patients in women who had first delivery in 2007.

		Adjusted Hazard Ratio (95% CI)	P Value
(model I)
Age at diagnosis of breast cancer	20-29	ref
	30-39	0.94 (0.38, 2.33)	0.8874
	40-49	0.73 (0.28, 1.91)	0.5270
	≥50	0.51 (0.06, 4.56)	0.5506
Time-since-first-delivery	<5yr	ref
	5yr-10yr	0.48 (0.32, 0.71)	0.0002
	>10yr	0.49 (0.27, 0.87)	0.0152
(model II)
Age at diagnosis of breast cancer	20-29	ref
	30-39	0.73 (0.29, 1.83)	0.5029
	40-49	0.78 (0.30, 2.04)	0.6070
	≥50	0.42 (0.05, 3.71)	0.4324
Time -since-first-delivery	<5yr	ref
	5yr-10yr	0.50 (0.34, 0.74)	0.0006
	>10yr	0.63 (0.35, 1.14)	0.1305
Endocrine therapy	No	ref
	Yes	0.29 (0.20, 0.42)	<.0001
Chemotherapy	No	ref
	Yes	6.59 (4.08, 10.65)	<.0001
Target therapy	No	ref
	Yes	0.89 (0.57, 1.38)	0.6025