Figure 2. Flow of Patients in a Study of the Effect of a Flying Intervention Team vs Patient Interhospital Transfer on Time to Endovascular Thrombectomy.

^aMultiple clinical exclusion criteria were possible. Patients may be included in more than 1 category.

^bGreater than 6 hours for anterior circulation occlusion without possibility of advanced imaging in primary stroke center and greater than 24 hours for posterior circulation occlusion or anterior circulation with mismatch in advanced imaging performed in primary stroke center.

^cThe Alberta Stroke Program Early CT Score is a 10-point quantitative topographic score that measures the extent of early ischemic changes in patients with middle cerebral artery stroke. Starting with 10, a 1-point deduction is made for every region involved. Scores range from 0 (10 affected regions) to 10 (0 affected regions).

^dClinical improvement and/or spontaneous recanalization.