Age at first stroke and cumulative incidence of stroke in SCD according to the type of SCD

Age at first stroke (ischemic or hemorrhagic) and cumulative incidence of stroke in 2436 patients with sickle cell disease. The graph shows the percentage of individuals without a stroke. These data largely represent patients who did not receive primary prevention. The number of patients of each type is as follows:

• Hb SS – 2346
• Hb S-beta⁰ thalassemia – 188
• Hb S-beta⁺ thalassemia – 184
• Hb SC disease – 839