The Adherence eValuation After Ischemic Stroke Longitudinal (AVAIL) Registry: Design, rationale, and baseline patient characteristics

Persistence diagram. Persistence represents the duration of time from initiation to discontinuation of therapy. Patients on a medication at 1 study time point who report taking the medication at a further study time point are considered to be persistent through that period (dark green arrows). Patients for whom the timing of medication initiation is unknown, that is, begun after a study time point, are considered initiators (indicated by dotted green line). Unknown end date for medication use is indicated by a dotted red line.