Ну а наличие первой группы крови, как и следовало ожидать, повышает риск кровоточивости:
Twenty-two studies totalling 9,468 bleeding patients and more than 450,000 controls were included. The prevalence of O blood group was significantly higher in bleeding patients than in controls, with a resulting pooled OR of 1.33 (95% CI = 1.25 to 1.42; p < 0.001). The result of this meta-analysis of a very large sample of bleeding patients and controls suggests that O blood group is a potentially important genetic risk factor for bleeding.
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Semin Thromb Hemost. 2013 Feb;39(1):72-82.
Relationship between ABO blood group and hemorrhage: a systematic literature review and meta-analysis.
Dentali F, Sironi AP, Ageno W, Bonfanti C, Crestani S, Frattini F, Steidl L, Franchini M.
тоже справедливо и для пациентов на варфарине:
The relationship between ABO blood group and the risk of bleeding during vitamin K antagonist treatment.
Garcia AA, van der Heijden JF, Meijers JC, Rosendaal FR, Reitsma PH.
J Thromb Haemost. 2006 Jun;4(6):1418-20
Relationship between ABO blood group and bleeding complications in orally anticoagulated patients.
Franchini M, Crestani S, Frattini F, Mengoli C, Bonfanti C.
J Thromb Haemost. 2012 Aug;10(8):1688-91.
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