Abstract
Purpose
Low-dose rivaroxaban is often given to patients with atrial fibrillation (AF) around the world, but the rationale for its use remains unclear. We aimed to compare the efficacy and safety of standard- or low-dose rivaroxaban in patients with AF through systematic review of literature with meta-analysis.
Methods
We searched PubMed, Web of Science, EMBASE, Clinical Trials.gov, the Cochrane Library, and Bayer trial website from inception of each database until June 2020. Randomized controlled trials (RCTs) and cohort studies were included in the meta-analysis. A random-effects model was employed to calculate the pooled effect estimates.
Results
Two RCTs and 17 cohort studies were included in the qualitative analysis. Indirect comparison of RCTs showed no significant difference between the two rivaroxaban dosages in risk of efficacy or safety outcomes (p > 0.05). Indirect comparison of cohort studies showed a lower risk of MACE among Caucasians in standard-dose group (HR 0.779; 95% CI 0.687–0.884; p < 0.001). Bleeding outcomes did not differ significantly between the two dosage regimens in Asian or Caucasian populations, except that the standard dose was associated with higher risk of major bleeding among elderly Caucasian patients (HR 1.329; 95% CI 1.141–1.547; p < 0.001). The quality of evidence was rated ranging from very low to low for all the efficacy and safety outcomes.
Conclusion
In Caucasians with AF, standard-dose rivaroxaban may prevent MACE significantly better than low-dose treatment. Further studies in Asians are needed to verify the advantages of the standard dose.
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Funding
This study was supported by grants from the National Key R&D Program of China (No. 2016YFC0904900), National Science and Technology Major Projects for “Major New Drugs Innovation and Development” of China (No. 2018ZX09201014, No. 2017ZX09101001 and No. 2017ZX09304028), National Natural Science Foundation of China (No. 81872940, 81973395 and 82073935) and Natural Science Foundation of Beijing Municipality (No. 7171012).
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Designed research: Guangyan Mu, Hanxu Zhang, Qian Xiang, and Yimin Cui.
Performed research: Guangyan Mu, Hanxu Zhang, Zhiyan Liu, Qiufen Xie, and Zining Wang.
Analyzed data: Guangyan Mu, Shuang Zhou, and Zhe Wang.
Wrote the manuscript: Guangyan Mu, and Hanxu Zhang.
Critically reviewed the manuscript: Kun Hu, Jingyi Hou, Nan Zhao, Qian Xiang, and Yimin Cui.
All authors approved the submitted version of the manuscript.
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Mu, G., Zhang, H., Liu, Z. et al. Standard- vs. low-dose rivaroxaban in patients with atrial fibrillation: a systematic review and meta-analysis. Eur J Clin Pharmacol 78, 181–190 (2022). https://doi.org/10.1007/s00228-021-03226-6
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DOI: https://doi.org/10.1007/s00228-021-03226-6