Cumulative incidence of stroke by risk group for the (A) Childhood Cancer Survivor Study (n = 13,060 at baseline), (B) St Jude Lifetime (n = 1,842 baseline), and (C) Emma Children’s Hospital/Academic Medical Center (n = 1,362 at baseline) cohorts. Curves start when all eligible cohort members have entered follow-up (age 26 years, except for St Jude Lifetime Cohort, which starts at age 35 years). As such, initial values shown may be > 0%.