Associations of Neuralgic Amyotrophy with COVID-19 Vaccination: Disproportionality Analysis Using the World Health Organization Pharmacovigilance Database
Overview
Affiliations
Introduction/aims: There are limited studies on the association of COVID-19 vaccination with neuralgic amyotrophy (NA). Therefore, we evaluated the association between COVID-19 vaccination and the occurrence of NA.
Methods: We explored unexpected safety signals for NA related to COVID-19 vaccination through disproportionality analysis using VigiBase, the World Health Organization's pharmacovigilance database.
Results: On October 15, 2021, 335 cases of NA were identified in the database. The median time to onset of NA after vaccination was around 2 weeks. A significant signal of disproportionality of NA was observed for the ChAdOx1 nCoV-19 vaccine (AstraZeneca) (information component [IC] = 0.33, reporting odds ratio [ROR] = 1.30) and two mRNA-based COVID-19 vaccines (BNT162b2 [Pfizer and BioNTech] and mRNA-1273 [Moderna]) (IC = 1.74, ROR = 3.82) compared with the entire database. However, when compared with influenza vaccines, we did not detect any signal of disproportionality of NA for both the ChAdOx1 nCoV-19 vaccine (IC = -2.71, ROR = 0.05) and mRNA-based COVID-19 vaccines (IC = -1.38, ROR = 0.13).
Discussion: A weak association was observed between NA and COVID-19 vaccines. However, the risk did not surpass that of influenza vaccines.
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