Cumulative incidence of an arterial event stratified by age of the patients at time of HSCT. (A) The cumulative incidence at 20 years is 8.7% for patients younger than 20 years, 20.2% for patients between 20 and 40 years, and 50.1% for patients between 40 and 60 years of age at HSCT (P < .001). (B) The cumulative incidence of an arterial vascular event at 15 years, adjusted for age. Using an adjusted Cox model, the relative risk is significantly higher after allogeneic than after autologous HSCT.