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ABO genotype and risk of thrombotic events and hemorrhagic stroke.


ABSTRACT: Background: The non-O alleles of the ABO genotype have been associated with an increased risk of thrombosis. Risk associated with the specific A(1), A(2) or B alleles is not well defined.

Objectives: To examine the association of the ABO genotype with myocardial infarction (MI), ischemic stroke, hemorrhagic stroke, and venous thrombosis (VT).

Patients and methods: We used data from two ongoing population-based case-control studies of MI, stroke, and VT. Cases included hypertensive adults and postmenopausal women with incident non-fatal MI (n = 1063), ischemic stroke (n = 469), and hemorrhagic stroke (n = 91), and postmenopausal women with incident non-fatal VT (n = 504). Controls were frequency matched to cases on age, sex, hypertension status, and year of identification. ABO genotypes were determined using single-nucleotide polymorphisms, and subjects were grouped by diplotype according to the presence of O(1), O(2), A(11), A(2) and B alleles. Logistic regression was used to test the association of diplotypes with risk of each outcome.

Results: As compared with the O(1)O(1) group, the A(11) allele was associated with an increased risk of VT [odds ratio (OR) 1.79; 95% confidence interval (CI) 1.41-2.26] and MI (OR 1.23; 95% CI 1.05-1.44). The B allele was associated with an increased risk of VT (OR 1.82; 95% CI 1.29-2.57) and ischemic stroke (OR 1.59; 95% CI 1.17-2.17). The AB diplotype category was associated with a 2.7-fold risk of VT (OR 2.70; 95% CI 1.73-4.21). No other associations reached significance.

Conclusions: The VT and MI findings are confirmatory, and the ischemic stroke finding with the B allele is a novel finding and needs replication.

SUBMITTER: Wiggins KL 

PROVIDER: S-EPMC2946410 | biostudies-literature | 2009 Feb

REPOSITORIES: biostudies-literature

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ABO genotype and risk of thrombotic events and hemorrhagic stroke.

Wiggins K L KL   Smith N L NL   Glazer N L NL   Rosendaal F R FR   Heckbert S R SR   Psaty B M BM   Rice K M KM   Lumley T T  

Journal of thrombosis and haemostasis : JTH 20081125 2


<h4>Background</h4>The non-O alleles of the ABO genotype have been associated with an increased risk of thrombosis. Risk associated with the specific A(1), A(2) or B alleles is not well defined.<h4>Objectives</h4>To examine the association of the ABO genotype with myocardial infarction (MI), ischemic stroke, hemorrhagic stroke, and venous thrombosis (VT).<h4>Patients and methods</h4>We used data from two ongoing population-based case-control studies of MI, stroke, and VT. Cases included hyperten  ...[more]

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