Table 2.

Risk of breast cancer specific mortality by histologic type according to age at diagnosis, 1992–2007

Histology	Number of cases	Number of deaths	Not adjusted for ER/PR status		Adjusted for ER/PR status		Adjusted for ER/PR status only 1992–2002
			HRa	95% CI	HRa	95% CI	HRa	95% CI
Women 30–49 years of age at diagnosis
Ductal	67,971	7,719	1.00	Ref	1.00	Ref	1.00	Ref
Ductal-lobular	6,326	551	0.92	0.84–1.00	1.04	0.95–1.13	1.05	0.96–1.16
Lobular	3,620	288	0.89	0.79–1.01	1.00	0.88–1.12	1.04	0.92–1.19
Mucinous	1,038	28	0.47	0.330.69*	0.52	0.36–0.76*	0.58	0.39–0.87*
Tubular	872	3	0.19	0.06–0.60*	0.21	0.07–0.67*	0.23	0.07–0.70*
Inflammatory	840	446	1.60	1.45–1.77*	1.53	1.38–1.70*	1.58	1.41–1.77*
Medullary	944	78	0.46	0.37–0.58*	0.38	0.30–0.48*	0.39	0.30–0.49*
Women 50+ years of age at diagnosis
Ductal	187,747	18,434	1.00	Ref	1.00	Ref	1.00	Ref
Ductal-lobular	20,574	1,502	0.84	0.79–0.88*	0.95	0.90–1.00	0.96	0.90–1.02
Lobular	17,442	1,391	0.85	0.80–0.89*	0.93	0.88–0.98*	0.90	0.85–0.97*
Mucinous	5,523	168	0.63	0.54–0.74*	0.69	0.59–0.80*	0.67	0.56–0.80*
Tubular	3,605	33	0.45	0.32–0.64*	0.47	0.33–0.66*	0.45	0.31–0.66*
Inflammatory	1,833	1,003	1.56	1.46–1.67*	1.50	1.41–1.61*	1.52	1.41–1.64*
Medullary	1,128	102	0.63	0.52–0.77*	0.50	0.41–0.60*	0.53	0.43–0.66*

^aAll hazard ratios (HR) are adjusted for age, diagnosis year, registry, race/ethnicity, stage, grade, surgery, radiation, and quartile of % incounty living below 200% of the federal poverty level

*p < 0.05