Title:Statin Therapy and Flow-Mediated Dilation: A Systematic Review and Dose-Response Meta-Analysis Using the GRADE of Data from Randomized Controlled Trials
Volume: 20
Issue: 2
Author(s): Seyyed Mostafa Arabi, Mahla Chambari, Leila Sadat Bahrami, Saeid Hadi and Amirhossein Sahebkar*
Affiliation:
- Applied Biomedical Research Center,
Mashhad University of Medical Sciences, Mashhad, Iran
- Biotechnology Research Center, Pharmaceutical Technology
Institute, Mashhad University of Medical Sciences, Mashhad, Iran.
Keywords:
Statins, endothelial function, randomized controlled trial, flow-mediated dilation, dose-response analysis, blood vessels.
Abstract:
Introduction: A previous meta-analysis reported the positive effects of statin therapy
on endothelial function. However, the obtained result had several limitations that necessitated updating
the information in this field. Therefore, a systematic and meta-analysis review was conducted
to determine whether statin therapy could improve endothelial function, as assessed by flow--
mediated dilation (FMD).
Methods: MEDLINE, SciVerse Scopus, and Clarivate Analytics Web of Science were searched to
identify randomized placebo-controlled trials assessing the impact of statin therapy on FMD. A
random-effects model was used for meta-analysis to calculate the mean difference in weight. Meta-
regression and subgroup analyses were used to identify sources of heterogeneity. In addition,
nonlinear dose-response, quality of evidence, influence analysis, and publication bias evaluation
were assessed using standard methods.
Result: Thirty-five trials (41 arms) involving 2178 participants were included in the meta-analysis
study. Statin treatment significantly improved FMD [weighted mean difference (WMD): 1.7%,
95% CI: 1.3-2.2, p < 0.001). However, significant heterogeneity was observed (I2=97.9%, p <
0.001). The results of the subgroup analysis showed that health status can contribute to heterogeneity.
Non-linear dose-response analysis revealed the most significant improvement in FMD with
atorvastatin at a dose of 20 mg/day and simvastatin at 80 mg/day.
Conclusion: Statin therapy significantly improved endothelial function, as assessed by FMD. These
changes are clinically significant, but their use should be approached with caution.