biostudies-literatureUnknown9(1)Hohl CM<h4>Background</h4>Emergency physicians lack high-quality evidence for many diagnostic and treatment decisions made for patients with suspected or confirmed coronavirus disease 2019 (COVID-19). Our objective is to describe the methods used to collect and ensure the data quality of a multicentre registry of patients presenting to the emergency department with suspected or confirmed COVID-19.<h4>Methods</h4>This methodology study describes a population-based registry that has been enrolling consecutive patients presenting to the emergency department with suspected or confirmed COVID-19 since Mar. 1, 2020. Most data are collected from retrospective chart review. Phone follow-up with patients at 30 days captures the World Health Organization clinical improvement scale and contextual, social anCMAJ openE261-E270https://www.ebi.ac.uk/biostudies/studies/S-EPMC8096396biostudies-literatureDevelopment of the Canadian COVID-19 Emergency Department Rapid Response Network population-based registry: a methodology study.PMC8096396Turner JPFok PTAtzema CDahn TStachura MLang EDaoust RDavis PMohindra RYan JWTaylor JWiemer HMartin IBrar BLandes MWelsford MCheng IOhle RYadav KPerry JJHayward JCanadian COVID-19 Emergency Department Rapid Response Network investigators and for the Network of Canadian Emergency Researchers and the Canadian Critical Care Trials GroupMorrison LJHohl CMMercier ETing DKArchambault PVaillancourt SRosychuk RJAndolfatto GMcGavin CMcRae ADJelic TBrooks SCKhangura JKRowe BHfalseDevelopment of the Canadian COVID-19 Emergency Department Rapid Response Network population-based registry: a methodology study.<h4>Background</h4>Emergency physicians lack high-quality evidence for many diagnostic and treatment decisions made for patients with suspected or confirmed coronavirus disease 2019 (COVID-19). Our objective is to describe the methods used to collect and ensure the data quality of a multicentre registry of patients presenting to the emergency department with suspected or confirmed COVID-19.<h4>Methods</h4>This methodology study describes a population-based registry that has been enrolling consecutive patients presenting to the emergency department with suspected or confirmed COVID-19 since Mar. 1, 2020. Most data are collected from retrospective chart review. Phone follow-up with patients at 30 days captures the World Health Organization clinical improvement scale and contextual, social an2021-01-01T00:00:00Z2021 Jan-Mar2026-05-01T07:40:08.035Z2025-02-19T00:18:48.739ZS-EPMC80963963373142710.9778/cmajo.20200290