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No evidence for an association between ABO blood group and overall ischemic stroke or any of the major etiologic subtypes

Journal article
Authors Ellen Hanson
Sara Karlsson
Katarina Jood
Staffan Nilsson
Christian Blomstrand
Christina Jern
Published in Thrombosis Research
Volume 130
Issue 3
Pages 339-342
ISSN 0049-3848
Publication year 2012
Published at Institute of Neuroscience and Physiology
Institute of Neuroscience and Physiology, Department of Clinical Neuroscience and Rehabilitation
Department of Mathematical Sciences, Mathematical Statistics
Pages 339-342
Language en
Links dx.doi.org/10.1016/j.thromres.2012....
https://gup.ub.gu.se/file/192098
Keywords ABO blood group, Ischemic stroke, TOAST subtype, cerebral-hemorrhage, risk, disease, infarction, genotype
Subject categories Neurology

Abstract

Introduction: The ABO blood group system is encoded by one gene, ABO. Previous studies have reported an association between blood group non-O (i.e. phenotype A, B or AB) and myocardial infarction. Studies on stroke and ABO are, however, more scarce. Therefore, we aimed to investigate whether ABO phenotype or genotype is associated with ischemic stroke and/or etiologic subtypes of ischemic stroke. Materials and methods: The study was performed in the Sahlgrenska Academy Study on Ischemic Stroke (SAHLSIS), which comprises 600 patients with ischemic stroke before the age of 70 years, and 600 matched controls. Patients were classified according to the TOAST criteria. Results: There was no significant association between ABO phenotype (blood group O vs. non-O) and overall ischemic stroke (multivariable odds ratio of 0.9, 95% confidence interval 0.7-1.2). This was also true for blood group O vs. A and O vs. B. Furthermore, no association between ABO genotypes and ischemic stroke was detected. The ischemic stroke subtype analysis was confined to large-vessel disease, small-vessel disease, cardioembolic stroke and cryptogenic stroke. In this analysis, there was no significant association between any ischemic stroke subtype and ABO phenotype or genotype. Conclusions: The findings in this study suggest that ABO phenotype or genotype does not have a major impact in the pathophysiology of ischemic stroke or any of the ischemic stroke subtypes.

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