Associations of anaemia with bleeding and thrombotic complications in patients with atrial fibrillation treated with warfarin: a registry-based nested case–control study

Autor: Pekka Raatikainen, Jari Haukka, Riitta Lassila, Mika Lehto, Tuukka Antero Helin
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: BMJ Open, Vol 13, Iss 11 (2023)
Druh dokumentu: article
ISSN: 2044-6055
DOI: 10.1136/bmjopen-2022-071342
Popis: Objectives We studied association of laboratory testing beyond the international normalised ratio (INR) with bleeding and stroke/transient ischaemic attack (TIA) outcomes in patients with atrial fibrillation treated with warfarin.Design This was a retrospective nested case–control study from the Finnish Warfarin in Atrial Fibrillation (FinWAF) registry (n=54 568), reporting the management and outcome in warfarin-anticoagulated patients. Associations of blood count test frequency and results were assessed together with risk of bleeding or stroke/TIA during 5-year follow-up.Setting National FinWAF registry, with data from all six hospital districts. Follow-up period for complications was 1 January 2007–31 December 2011.Participants A total of 54 568 warfarin-anticoagulated patients.Results The number of patients with bleeding was 4681 (9%) and stroke/TIA episodes, 4692 (9%). In patients with bleeds, lower haemoglobin (within 3 months) preceded the event compared with the controls (median 126 vs 135 g/L; IQR 111–141 g/L vs 123–147 g/L, p
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