Background incidence rates of hospitalisations and emergency department visits for thromboembolic and coagulation disorders in Ontario, Canada for COVID-19 vaccine safety assessment: a population-based retrospective observational study.
Sharifa NasreenAndrew J CalzavaraMaria E SundaramShannon Elizabeth MacDonaldChristiaan H RigholtMenaka PaiThalia S FieldLily W ZhouSarah E WilsonJeffrey C KwongPublished in: BMJ open (2021)
Our estimated background rates help contextualise observed events of these potential adverse events of special interest and to detect potential safety signals related to COVID-19 vaccines.