GP consultations for menstrual disorders after COVID-19 vaccination – A self-controlled cohort study based on routine healthcare data from the Netherlands

Introduction: Several studies described that COVID-19 vaccinations can cause menstrual disorders. Our study aimed to describe whether this also resulted in more general practitioner (GP) consultations for menstrual disorders after COVID-19 vaccination, based on a large cohort study. Methods: A retrospective self-controlled cohort study was performed including vaccinated women in 2021 aged 12–49 years from two large, representative GP databases in the Netherlands. Incidence rates and incidence rate ratio's (IRR) were calculated using Poisson regression, adjusting for SARS-CoV-2 infection as tim... Mehr ...