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. 2022 Jun 24:9:907197.
doi: 10.3389/fcvm.2022.907197. eCollection 2022.

Effectiveness and Safety of DOACs vs. Warfarin in Patients With Atrial Fibrillation and Frailty: A Systematic Review and Meta-Analysis

Shan Zeng  1 , Yuxiang Zheng  2 , Jingzhou Jiang  3 , Jianyong Ma  4 , Wengen Zhu  3 , Xingming Cai  5
Affiliations

Effectiveness and Safety of DOACs vs. Warfarin in Patients With Atrial Fibrillation and Frailty: A Systematic Review and Meta-Analysis

Shan Zeng et al. Front Cardiovasc Med. .

Abstract

Background: Patients with atrial fibrillation (AF) and frailty are a considerable group in clinical practice. However, existing studies provide insufficient evidence of anticoagulation strategies for these patients. Therefore, we conducted a meta-analysis to determine the effectiveness and safety outcomes of direct oral anticoagulants (DOACs) for these patients.

Methods: Randomized controlled trials or observational studies reporting the data about the DOACs and warfarin therapy among frail AF patients were included. The search was performed in the PubMed and Embase databases up to March 2022. Frailty was defined using the most widely used claims-based frailty index or the cumulative deficit model-based frailty index.

Results: A total of 4 studies involving 835,520 patients were included. Compared with warfarin, DOACs therapy reduced the risks of stroke or systemic embolism (HR = 0.79, 95%CI: 0.69-0.90), ischemic stroke (HR = 0.79, 95%CI: 0.71-0.87), hemorrhagic stroke (HR = 0.52, 95%CI: 0.35-0.76), and all-cause death (HR = 0.90, 95%CI: 0.84-0.96). In safety outcomes, DOACs was significantly associated with reduced risks of major bleeding (HR = 0.79, 95%CI: 0.64-0.97) and intracranial hemorrhage (HR = 0.58, 95%CI: 0.52-0.65) compared to warfarin, but there were no statistically differences in gastrointestinal bleeding (HR = 0.97, 95%CI: 0.73-1.29).

Conclusions: DOACs exerted superior effectiveness and safety outcome than warfarin in AF patients with frailty.

Keywords: anticoagulation; atrial fibrillation; frailty; meta-analysis; prognosis.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
The flow chart of literature retrieval of this meta-analysis.
Figure 2
Figure 2
Comparing effectiveness of DOACs with warfarin in AF patients with frailty. AF, atrial fibrillation; SSE, stroke and systemic embolism; DOACs, direct oral anticoagulants; CI, confidence interval; IV, inverse of the variance; SE, standard error.
Figure 3
Figure 3
Comparing safety of DOACs with warfarin in AF patients with frailty. AF, atrial fibrillation; DOACs, direct oral anticoagulants; CI, confidence interval; IV, inverse of the variance; SE, standard error.
See this image and copyright information in PMC

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