FIG 8. Kaplan-Meier event-free survival from ipsilateral stroke for patients with near occlusion.

A, The 3-year intention-to-treat risk of ipsilateral stroke in NASCET patients was 17.9% for medically treated and 11.4% for surgically treated. The 3-year risk of ipsilateral stroke for medically treated NASCET patients who continued to receive medical therapy throughout the duration of the trial (on-treatment) was 27.3%.

B, The 3-year intention-to-treat risk of ipsilateral stroke in ECST patients was 11.1% for medically treated and 10.5% for surgically treated. The 3-year risk of ipsilateral stroke for medically treated ECST patients who continued to receive medical therapy throughout the duration of the trial (on-treatment) was 11.6%.