Kaplan-Meier curves for all-cause mortality by race/ethnicity in the (A) Pulmonary Arterial Hypertension Biobank and the (B) Allegheny Health Network cohort. Survival was calculated from enrollment up to date of death or censoring. In the Pulmonary Arterial Hypertension Biobank, January 1, 2018, was used as the date of censoring. In the Allegheny Health Network cohort, if a specific date for last contact was not recorded, the date December 19, 2014, was used as the censoring date. Logrank tests were performed for differential survival between race/ethnic groups. Kaplan-Meier curves were stopped when 10% of the original number at risk remained. AAs = African American patients; no. = number.