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Kaplan-Meier curves depicting survival of adults with SCD. Median survival was 48.0 years (95% CI, 44.4-58.4) for individuals with the HbSS/HbSβ0/HbSD phenotypes (n = 225) and 54.7 years (95% CI, 38.6-62.9) for individuals with the HbSC/HbSβ+ phenotypes (n = 75).
