Clinical impact of major bleeding in patients with venous thromboembolism treated with factor Xa inhibitors or vitamin K antagonists.

Abstract:

:Factor Xa (fXa)-inhibitors are as effective and safer than vitamin-K-antagonists (VKA) in the treatment of venous thromboembolism (VTE). We previously classified the severity of clinical presentation and course of all major bleeding events from the EINSTEIN, AMPLIFY and HOKUSAI-VTE trials separately. The current aim was to combine these findings in order to increase precision, assess a class effect and analyse presentation and course for different types of bleeding, i. e. intracranial, gastro-intestinal, and other. We classified the clinical presentation and course of all major bleeding events using pre-defined criteria. Both classifications comprised four categories; one being the mildest, and four the most severe. Odds ratios (OR) were calculated for all events classified as category three or four between fXa-inhibitors and VKA recipients. Also, ORs were computed for different types of bleeding. Major bleeding occurred in 111 fXa-inhibitor recipients and in 187 LMWH/VKA recipients. The clinical presentation was classified as category three or four in 35% and 48% of the major bleeds in fXa inhibitor and VKA recipients, respectively (OR 0.59, 95% CI 0.36-0.97). For intracranial, gastro-intestinal and other bleeding a trend towards a less severe presentation was observed for patients treated with fXa inhibitors. Clinical course was classified as severe in 22% of the fXa inhibitor and 25% of the VKA associated bleeds (OR 0.83, 95% CI 0.47-1.46). In conclusion, FXa inhibitor associated major bleeding events had a significantly less severe presentation and a similar course compared to VKA. This finding was consistent for different types of bleeding.

journal_name

Thromb Haemost

authors

Bleker SM,Brekelmans MPA,Eerenberg ES,Cohen AT,Middeldorp S,Raskob G,Büller HR

doi

10.1160/TH16-12-0946

subject

Has Abstract

pub_date

2017-10-01 00:00:00

pages

1944-1951

issue

10

eissn

0340-6245

issn

2567-689X

journal_volume

117

pub_type

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