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Adequate Adherence to Direct Oral Anticoagulant is Associated with Reduced Ischemic Stroke Severity in Patients with Atrial Fibrillation.
Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association 2018 October 12
BACKGROUND: The impact of adherence to direct oral anticoagulants (DOACs) is unknown. We aimed to assess the effects of preceding anticoagulation treatment on neurologic severity at admission and functional outcomes at discharge in patients with atrial fibrillation (AF) who developed acute ischemic stroke.
METHODS: We retrospectively assessed consecutive patients with acute ischemic stroke and AF. Adherence to DOACs was assessed using the 4-item Morisky Medication Adherence Scale. Associations between preceding DOAC treatment and stroke severity at admission and functional outcomes at hospital discharge were examined.
RESULTS: Of 387 patients with AF and acute ischemic stroke, 248 (64.1%) were not administered an anticoagulant before stroke onset, 95 (24.5%) had subtherapeutic warfarin with an international normalized ratio less than 2 at the time of stroke, 16 (4.1%) had therapeutic warfarin, 6 (1.6%) had DOACs with nonadherence, and 22 (5.7%) had DOACs with adequate adherence. Multivariate analysis showed that DOAC treatment with adequate adherence was associated with lower odds of severe stroke (National Institute of Health Stroke Scale ≥10 at admission) (odds ratio, .24; 95% confidence interval, .03-.98; P = .04) and higher odds of excellent recovery (modified Rankin Scale score, 0-1 at discharge) (odds ratio, 4.89; 95% confidence interval, 1.51-20.6; P < .01) compared with no anticoagulation therapy.
CONCLUSIONS: Preceding DOAC treatment with adequate adherence has beneficial effects on stroke severity at admission and functional outcome at discharge in patients with AF. Hence, our results encourage an increased effort to bolster adherence to DOACs in patients with AF.
METHODS: We retrospectively assessed consecutive patients with acute ischemic stroke and AF. Adherence to DOACs was assessed using the 4-item Morisky Medication Adherence Scale. Associations between preceding DOAC treatment and stroke severity at admission and functional outcomes at hospital discharge were examined.
RESULTS: Of 387 patients with AF and acute ischemic stroke, 248 (64.1%) were not administered an anticoagulant before stroke onset, 95 (24.5%) had subtherapeutic warfarin with an international normalized ratio less than 2 at the time of stroke, 16 (4.1%) had therapeutic warfarin, 6 (1.6%) had DOACs with nonadherence, and 22 (5.7%) had DOACs with adequate adherence. Multivariate analysis showed that DOAC treatment with adequate adherence was associated with lower odds of severe stroke (National Institute of Health Stroke Scale ≥10 at admission) (odds ratio, .24; 95% confidence interval, .03-.98; P = .04) and higher odds of excellent recovery (modified Rankin Scale score, 0-1 at discharge) (odds ratio, 4.89; 95% confidence interval, 1.51-20.6; P < .01) compared with no anticoagulation therapy.
CONCLUSIONS: Preceding DOAC treatment with adequate adherence has beneficial effects on stroke severity at admission and functional outcome at discharge in patients with AF. Hence, our results encourage an increased effort to bolster adherence to DOACs in patients with AF.
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