Serious Adverse Events of Special Interest Following mRNA Vaccination in Randomized Trials:
https://papers.ssrn.com/sol3/papers....act_id=4125239
Quote:
22 Pages Posted: 23 Jun 2022
Joseph Fraiman
Louisiana State University - Lallie Kemp Regional Medical Center
Juan Erviti
Navarre Health Service
Mark Jones
Bond University - Institute for Evidence-Based Healthcare
Sander Greenland
University of California, Los Angeles (UCLA) - Jonathan and Karin Fielding School of Public Health
Patrick Whelan
University of California at Los Angeles
Robert M. Kaplan
Stanford University
Peter Doshi
University of Maryland - School of Pharmacy
Abstract
Introduction: In 2020, prior to COVID-19 vaccine rollout, the Coalition for Epidemic Preparedness Innovations and Brighton Collaboration created a priority list, endorsed by the World Health Organization, of potential adverse events relevant to COVID-19 vaccines. We leveraged the Brighton Collaboration list to evaluate serious adverse events of special interest observed in phase III randomized trials of mRNA COVID-19 vaccines.
Methods: Secondary analysis of serious adverse events reported in the placebo-controlled, phase III randomized clinical trials of Pfizer and Moderna mRNA COVID-19 vaccines (NCT04368728 and NCT04470427), focusing analysis on potential adverse events of special interest identified by the Brighton Collaboration.
Results: Pfizer and Moderna mRNA COVID-19 vaccines were associated with an increased risk of serious adverse events of special interest, with an absolute risk increase of 10.1 and 15.1 per 10,000 vaccinated over placebo baselines of 17.6 and 42.2 (95% CI -0.4 to 20.6 and -3.6 to 33.8), respectively. Combined, the mRNA vaccines were associated with an absolute risk increase of serious adverse events of special interest of 12.5 per 10,000 (95% CI 2.1 to 22.9). The excess risk of serious adverse events of special interest surpassed the risk reduction for COVID-19 hospitalization relative to the placebo group in both Pfizer and Moderna trials (2.3 and 6.4 per 10,000 participants, respectively).
Discussion: The excess risk of serious adverse events found in our study points to the need for formal harm-benefit analyses, particularly those that are stratified according to risk of serious COVID-19 outcomes such as hospitalization or death.
Note:
Funding Information: This study had no funding support.
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This is a Preprint where the authors performed a secondary analysis of serious adverse events reported in the placebo-controlled, phase III randomized clinical trials of Pfizer and Moderna mRNA COVID-19 vaccines.
They found:
The excess risk of serious adverse events of special interest surpassed the risk reduction for COVID-19 hospitalization relative to the placebo group in both Pfizer and Moderna trials.
Their words not mine.
-jp
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