Disparities in cancer risk management among BRCA carriers across a diverse sample of young black, Hispanic, and non-Hispanic white breast cancer survivors.

Abstract

LBA1504 Background: Rates of risk-reducing bilateral mastectomy (RRM) or risk-reducing prophylactic oophorectomy (RRSO) among BRCA carriers are based on studies of non-Hispanic whites (NHW), with little known among blacks or Hispanics. Methods: A population-based sample of NHW, black, and Hispanic women diagnosed with invasive BC < age 50 in 2009-12 were recruited through the Florida State Cancer Registry and completed a baseline survey. Among the subset of BRCA carriers, we compared risk management for: 1) ovarian cancer (OC) through RRSO; and 2) BC through RRM or MRI screening, by calculating percentages and conducting logistic regression to control for other variables. Results: Of 1570 participants, 884 reported BRCA testing. Of the 91 BRCA carriers, 1) RRSO was 71% (36/51) among NHW, 32% (9/28) among blacks, and 83% (10/12) among Hispanics; 2) either breast MRI or RRM was 98% (50/51) among NHW, 85.7% (24/28) among blacks, and 100% (12/12) among Hispanics. BC risk management modality differed across groups, with lower rates of RRM among blacks (67%) compared to Hispanics (83%) and NHW (94%). After controlling for age at enrollment, time since diagnosis, income, family history of BC, family history of OC and private insurance at diagnosis: 1) Hispanics and NHW were significantly more likely than blacks to have RRSO (p = 0.01 and 0.02 respectively); and 2) NHW were also significantly more likely than blacks to have RRM (p = 0.03), although Hispanic race approached statistical significance (p = 0.10). Conclusions: The racial disparities in uptake of RRSO observed among blacks is particularly concerning given that RRSO is strongly recommended as the main OC prevention option due to the absence of effective OC early detection methods. The benefit from genetic testing comes from uptake of cancer risk management options, rather from testing itself. Future studies are needed to better understand and develop methods to improve cancer risk management practices across all populations.