open access

Vol 76, No 5 (2018)
Original articles
Published online: 2018-01-12
Submitted: 2017-09-24
Accepted: 2017-12-18
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Comparison of clinical characteristics of real-life atrial fibrillation patients treated with vitamin K antagonists, dabigatran, and rivaroxaban: results from the CRAFT study

Paweł Balsam, Krzysztof Ozierański, Agata Tymińska, Katarzyna Żukowska, Martyna Zaleska, Katarzyna Szepietowska, Kacper Maciejewski, Michał Peller, Marcin Grabowski, Piotr Lodziński, Anna Praska-Ogińska, Inna Zaboyska, Łukasz Kołtowski, Anna Kowalczuk, Janusz Bednarski, Krzysztof J. Filipiak, Grzegorz Opolski
DOI: 10.5603/KP.a2018.0027
·
Kardiol Pol 2018;76(5):889-898.

open access

Vol 76, No 5 (2018)
Original articles
Published online: 2018-01-12
Submitted: 2017-09-24
Accepted: 2017-12-18

Abstract

Background:

The first-line drugs for the treatment of non-valvular atrial fibrillation (AF) are non-vitamin K antagonist oral anticoagulants (NOACs), which are preferred over vitamin K antagonists (VKAs). There is some evidence that there are dis-crepancies between everyday clinical practice and the guidelines.


Aim:

The study aimed to compare the characteristics of patients on VKAs, dabigatran, and rivaroxaban in everyday practice (i.e. baseline characteristics, drug doses, risk factors for bleeding and thromboembolic events). Additionally, we assessed the frequency of prescription of different oral anticoagulants (OACs) in recent years.
Methods: This study consisted of data from the multicentre CRAFT (MultiCentre expeRience in AFib patients Treated with OAC) study (NCT02987062). This was a retrospective analysis of hospital records of AF patients (hospitalised in the years 2011–2016) treated with VKAs (acenocoumarol, warfarin) and NOACs (dabigatran, rivaroxaban). A total of 3528 patients with non-valvular AF were enrolled in the CRAFT study.


Results:

The total cohort consisted of 1973 patients on VKA, 504 patients on dabigatran, and 1051 patients on rivaroxaban. Patients on rivaroxaban were older (70.5 ± 13.1 years) and more often female (47.9%), compared with those on VKAs (67.0 ± 12.8 years, p < 0.001; 35.5%, p < 0.001) and on dabigatran (66.0 ± 13.9 years, p < 0.001; 38.9%, p = 0.001). Among NOACs, patients with persistent and permanent AF were more likely to receive rivaroxaban (54.7% and 73.4%, re-spectively) than dabigatran (45.3%, p < 0.001 and 26.6%, p = 0.002, respectively). Patients on rivaroxaban had higher risk of thromboembolic events (CHA2DS2VASc 3.9 ± 2.0, CHADS2 2.2 ± 1.4) than those on VKAs (3.3 ± 2.0, 1.9 ± 1.3) and on dabigatran (3.1 ± 2.0, 1.8 ± 1.3). Patients on rivaroxaban had also a higher rate of prior major bleeding (11.2%) than those on VKAs (6.7%, p < 0.001) and on dabigatran (7.3%, p = 0.02). Patients on lower doses of dabigatran and rivaroxaban had a significantly higher risk of thromboembolic and bleeding events. Use of VKAs in the year 2011 was reported in over 96% of patients on OACs, but this proportion decreased to 34.6% in 2016. In the last analysed year (2016) AF patients were treated mainly with NOACs — dabigatran (24.2%) and rivaroxaban (41.3%).


Conclusions:

The prescription of VKAs declined significantly after the introduction of NOACs. Patients treated with different OACs demonstrated a distinct baseline clinical profile. The highest risk of thromboembolic events and incidence of major bleedings was observed in patients on rivaroxaban, in comparison to patients on VKAs and dabigatran. Among NOACs, patients treated with lower doses of dabigatran and rivaroxaban were older and had a significantly higher risk of thromboembolic and bleeding events.

Abstract

Background:

The first-line drugs for the treatment of non-valvular atrial fibrillation (AF) are non-vitamin K antagonist oral anticoagulants (NOACs), which are preferred over vitamin K antagonists (VKAs). There is some evidence that there are dis-crepancies between everyday clinical practice and the guidelines.


Aim:

The study aimed to compare the characteristics of patients on VKAs, dabigatran, and rivaroxaban in everyday practice (i.e. baseline characteristics, drug doses, risk factors for bleeding and thromboembolic events). Additionally, we assessed the frequency of prescription of different oral anticoagulants (OACs) in recent years.
Methods: This study consisted of data from the multicentre CRAFT (MultiCentre expeRience in AFib patients Treated with OAC) study (NCT02987062). This was a retrospective analysis of hospital records of AF patients (hospitalised in the years 2011–2016) treated with VKAs (acenocoumarol, warfarin) and NOACs (dabigatran, rivaroxaban). A total of 3528 patients with non-valvular AF were enrolled in the CRAFT study.


Results:

The total cohort consisted of 1973 patients on VKA, 504 patients on dabigatran, and 1051 patients on rivaroxaban. Patients on rivaroxaban were older (70.5 ± 13.1 years) and more often female (47.9%), compared with those on VKAs (67.0 ± 12.8 years, p < 0.001; 35.5%, p < 0.001) and on dabigatran (66.0 ± 13.9 years, p < 0.001; 38.9%, p = 0.001). Among NOACs, patients with persistent and permanent AF were more likely to receive rivaroxaban (54.7% and 73.4%, re-spectively) than dabigatran (45.3%, p < 0.001 and 26.6%, p = 0.002, respectively). Patients on rivaroxaban had higher risk of thromboembolic events (CHA2DS2VASc 3.9 ± 2.0, CHADS2 2.2 ± 1.4) than those on VKAs (3.3 ± 2.0, 1.9 ± 1.3) and on dabigatran (3.1 ± 2.0, 1.8 ± 1.3). Patients on rivaroxaban had also a higher rate of prior major bleeding (11.2%) than those on VKAs (6.7%, p < 0.001) and on dabigatran (7.3%, p = 0.02). Patients on lower doses of dabigatran and rivaroxaban had a significantly higher risk of thromboembolic and bleeding events. Use of VKAs in the year 2011 was reported in over 96% of patients on OACs, but this proportion decreased to 34.6% in 2016. In the last analysed year (2016) AF patients were treated mainly with NOACs — dabigatran (24.2%) and rivaroxaban (41.3%).


Conclusions:

The prescription of VKAs declined significantly after the introduction of NOACs. Patients treated with different OACs demonstrated a distinct baseline clinical profile. The highest risk of thromboembolic events and incidence of major bleedings was observed in patients on rivaroxaban, in comparison to patients on VKAs and dabigatran. Among NOACs, patients treated with lower doses of dabigatran and rivaroxaban were older and had a significantly higher risk of thromboembolic and bleeding events.

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Keywords

anticoagulation, atrial fibrillation, drug dose, non-vitamin K antagonist oral anticoagulants (NOACs), vitamin K antagonists (VKAs)

About this article
Title

Comparison of clinical characteristics of real-life atrial fibrillation patients treated with vitamin K antagonists, dabigatran, and rivaroxaban: results from the CRAFT study

Journal

Kardiologia Polska (Polish Heart Journal)

Issue

Vol 76, No 5 (2018)

Pages

889-898

Published online

2018-01-12

DOI

10.5603/KP.a2018.0027

Bibliographic record

Kardiol Pol 2018;76(5):889-898.

Keywords

anticoagulation
atrial fibrillation
drug dose
non-vitamin K antagonist oral anticoagulants (NOACs)
vitamin K antagonists (VKAs)

Authors

Paweł Balsam
Krzysztof Ozierański
Agata Tymińska
Katarzyna Żukowska
Martyna Zaleska
Katarzyna Szepietowska
Kacper Maciejewski
Michał Peller
Marcin Grabowski
Piotr Lodziński
Anna Praska-Ogińska
Inna Zaboyska
Łukasz Kołtowski
Anna Kowalczuk
Janusz Bednarski
Krzysztof J. Filipiak
Grzegorz Opolski

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