Nonrelapse mortality. (A) Nonrelapse mortality by recipient age and donor-recipient relationship. The 2-year cumulative incidence of nonrelapse mortality adjusted for recipient cytomegalovirus serostatus and graft type among recipients younger than 55 years was 11% (95% CI, 6%-18%) for parent donors, 12% (95% CI, 8%-17%) for sibling donors, and 18% (95% CI, 11%-26%) for offspring donors, and among recipients at least 55 years old, it was 29% (95% CI, 20%-39%) for sibling donors and 21% (95% CI, 16%-26%) for offspring donors. (B) Nonrelapse mortality by recipient age and donor age. The 2-year cumulative incidence of nonrelapse mortality adjusted for recipient cytomegalovirus serostatus and graft type among recipients younger than 55 years was 13% (95% CI, 8%-19%) with donors younger than 30 years and 14% (95% CI, 10%-19%) with donors at least 30 years old, and among recipients at least 55 years old, it was 18% (95% CI, 11%-27%) with donors younger than 30 years and 25% (95% CI, 20%-30%) with donors at least 30 years old.