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. Author manuscript; available in PMC: 2019 Jan 11.
Published in final edited form as: Neuroepidemiology. 2018 Jan 11;50(1-2):23–28. doi: 10.1159/000486174

Figure 1. Ischemic stroke subtype classifications based on three criteria.

Figure 1

Ischemic stroke subtypes are: large vessel, extracranial (LV EC); large vessel, intracranial (LV IC); cardioembolic (CE); small vessel (SV); other specific mechanisms (Other); multiple mechanisms (Multiple); or undetermined. The diagonal arrows show how those in the undetermined subtype in the first row and multiple subtype in the second row are redistributed. In the first row (N=211), strict criteria were applied, and the undetermined subtype included those in the multiple subtype. In the second row (N=211), less strict criteria were applied to those classified as undetermined based on strict criteria. For the multiple subtype with less strict criteria, all 7 had SV combined with LV EC in 2, LV IC in 2, CE in 2 and Other in 1. These 14 additional subtypes were added to the numbers in the second row to yield the Less Strict+ criteria listed in the third row (N=218), allowing each event to have 2 subtypes.