Breast cancer survival in African-American women by hormone receptor subtypes

被引:18
作者
Akinyemiju, Tomi [1 ]
Moore, Justin Xavier [1 ,2 ]
Altekruse, Sean F. [3 ]
机构
[1] Univ Alabama Birmingham, Dept Epidemiol, Birmingham, AL 35294 USA
[2] Univ Alabama Birmingham, Dept Emergency Med, Sch Med, Birmingham, AL 35294 USA
[3] NCI, Canc Stat Branch, Div Canc Control & Populat Sci, Bethesda, MD 20892 USA
关键词
Breast cancer; Hormone receptor subtype; Triple negative; African Americans; Survival;
D O I
10.1007/s10549-015-3528-7
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Breast cancer accounts for over 200,000 annual cases among women in the United States, and is the second leading cause of cancer-related deaths. However, few studies have investigated the association between breast cancer subtype and survival among African-American women. We analyzed cancer-related deaths among African-American women using data obtained from the SEER database linked to the 2000 U.S. census data. We examined distribution of baseline socio-demographic and clinical characteristics by breast cancer subtypes and used Cox proportional hazard models to determine associations between breast cancer subtypes and cancer-related mortality, adjusting for age, socio-economic status, stage at diagnosis, and treatment. Among 19,836 female breast cancer cases, 54.4 % were diagnosed with the HER2-/HR+ subtype, with the majority of those cases occurring among women ages 55 and older. However, after adjusting for age, stage, and treatment type (surgery, radiation, or no radiation and/or cancer-directed surgery), TNBC (HR 2.34; 95 % CI 1.95-2.81) and HER2+/HR- (HR 1.39, 95 % CI 1.08-1.79) cases had significantly higher hazards of cancer-related deaths compared with HER2+/HR+ cases. Adjusting for socio-economic status did not significantly alter these associations. African-American women with TNBC were more likely to have a cancer-related death than African-American women with other breast cancer subtypes. This association remained after adjustments for age, stage, treatment, and socio-economic status. Further studies are needed to identify subtype-specific risk and prognostic factors aimed at better informing prevention efforts for all women.
引用
收藏
页码:211 / 218
页数:8
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