Changing in the pattern of breast cancer burden among African-American Evidence based on 29 states and District of Columbia during 1998−2010
A partir des données des registres américains des cancers, cette étude analyse l'évolution de l'incidence du cancer du sein chez les femmes afro-américaines, sur la période 2008-2010
Purpose : Assessment of breast cancer (BC) pattern in individual states with respect to ethnicity. Methods Population-based cancer registries from the Cancer Incidence in Five Continents databases (1998−2007) supplemented with SEER data from 2008−2010 were used. Results : The age-specific burden showed a clear convergence of BC burden among African American (AA) and Caucasian American (CA) in most states. This was primarily due to a decrease in the BC rate among CA aged ≥50 years, and an increase among AA of the same age group. The 2003−2007/1998−2002 rate ratio (RR) for CA was 0.91 (95% CI=0.90–0.91) in the South, whereas it was 1.06 (95% CI=1.04–1.08) for AA. This convergence was confirmed in states with available data for the period 2008−2010. The AA/CA RR among women aged <40 years was 0.99 (95% CI=0.99–1.04) in the Northeast, 1.29 (95% CI=1.25–1.33) in the South, and 1.10 (95% CI=1.04–1.17) in the West. This pattern correlates with the ER+ and PR+ pattern. The strongest disparity in ER- was observed in Louisiana which with Detroit, have had the highest rates of ER-. Conclusions : The changes in postmenopausal hormone use and mammography screening might have played a role in the observed convergence.