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Black-to-white breast cancer mortality and incidence rate ratios (RRsBW) for three age groups. A) Mortality RRBW. B) Incidence RRBW. Observed values (dots, age ≥70 years; squares, ages 50–69 years; and triangles, ages 30–49 years) are shown along with the corresponding fitted trends (solid line, dashed line, and dot–dash line, respectively) with 95% confidence intervals (shaded areas). Broken black line indicates an RRBW = 1.
