Accuracy of self-reported COVID-19 vaccination status compared with a public health vaccination registry in Québec : observational diagnostic study
Accuracy of self-reported COVID-19 vaccination status compared with a public health vaccination registry in Québec : observational diagnostic study
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- dc.contributor.author
- Archambault, Patrick M.
- Rosychuk, Rhonda J.
- Audet, Martyne
- Bola, Rajan
- Vatanpour, Shabnam
- Brooks, Steven C.
- Daoust, Raoul
- Clark, Gregory
- Grant, Lars
- Vaillancourt, Samuel
- Welsford, Michelle
- Morrison, Laurie J.
- Hohl, Corinne M.
- Canadian COVID-19 Emergency Department Rapid Response Network (CCEDRRN) investigators
- Network of Canadian Emergency Researchers
- Canadian Critical Care Trials Group
- dc.date.accessioned
- 2025-02-06T15:50:05Z
- dc.date.available
- 2025-02-06T15:50:05Z
- dc.date.issued
- 2023-06-16
- dc.description.abstract - en
- <p>Background: The accuracy of self-reported vaccination status is important to guide real-world vaccine effectiveness studies and policy making in jurisdictions where access to electronic vaccine registries is restricted.</p> <p>Objective: This study aimed to determine the accuracy of self-reported vaccination status and reliability of the self-reported number of doses, brand, and time of vaccine administration.</p> <p>Methods: This diagnostic accuracy study was completed by the Canadian COVID-19 Emergency Department Rapid Response Network. We enrolled consecutive patients presenting to 4 emergency departments (EDs) in Québec between March 24, 2020, and December 25, 2021. We included adult patients who were able to consent, could speak English or French, and had a proven COVID-19 infection. We compared the self-reported vaccination status of the patients with their vaccination status in the electronic Québec Vaccination Registry. Our primary outcome was the accuracy of the self-reported vaccination status (index test) ascertained during telephone follow-up compared with the Québec Vaccination Registry (reference standard). The accuracy was calculated by dividing all correctly self-reported vaccinated and unvaccinated participants by the sum of all correctly and incorrectly self-reported vaccinated and unvaccinated participants. We also reported interrater agreement with the reference standard as measured by unweighted Cohen κ for self-reported vaccination status at telephone follow-up and at the time of their index ED visit, number of vaccine doses, and brand.</p> <p>Results: During the study period, we included 1361 participants. At the time of the follow-up interview, 932 participants reported at least 1 dose of a COVID-19 vaccine. The accuracy of the self-reported vaccination status was 96% (95% CI 95%-97%). Cohen κ for self-reported vaccination status at phone follow-up was 0.91 (95% CI 0.89-0.93) and 0.85 (95% CI 0.77-0.92) at the time of their index ED visit. Cohen κ was 0.89 (95% CI 0.87-0.91) for the number of doses, 0.80 (95% CI 0.75-0.84) for the brand of the first dose, 0.76 (95% CI 0.70-0.83) for the brand of the second dose, and 0.59 (95% CI 0.34-0.83) for the brand of the third dose.</p> <p>Conclusions: We reported a high accuracy of self-reported vaccination status for adult patients without cognitive disorders who can express themselves in English or French. Researchers can use self-reported COVID-19 vaccination data on the number of doses received, vaccine brand name, and timing of vaccination to guide future research with patients who are capable of self-reporting their vaccination data. However, access to official electronic vaccine registries is still needed to determine the vaccination status in certain susceptible populations where self-reported vaccination data remain missing or impossible to obtain.</p> <p>Trial Registration: Clinicaltrials.gov NCT04702945; https://clinicaltrials.gov/ct2/show/NCT04702945</p>
- dc.description.sponsorship
- This network was funded by the Canadian Institutes of Health Research (447679, 464947, and 466880); Ontario Ministry of Colleges and Universities (C-655-2129); Saskatchewan Health Research Foundation (5357); Genome BC (COV024 and VAC007); Fondation du CHU de Québec (Octroi No. 4007); and Sero-Surveillance and Research (COVID-19 Immunity Task Force Initiative), who provided peer-reviewed funding. The BC Academic Health Science Network and BioTalent Canada provided non–peer-reviewed funding.
- dc.identifier.doi
- https://doi.org/10.2196/44465
- dc.identifier.issn
- 2369-2960
- dc.identifier.pubmedID
- 37327046
- dc.identifier.uri
- https://open-science.canada.ca/handle/123456789/3399
- dc.language.iso
- en
- dc.publisher - en
- JMIR Publications
- dc.rights - en
- Creative Commons Attribution 4.0 International (CC BY 4.0)
- dc.rights - fr
- Creative Commons Attribution 4.0 International (CC BY 4.0)
- dc.rights.uri - en
- https://creativecommons.org/licenses/by/4.0/
- dc.rights.uri - fr
- https://creativecommons.org/licenses/by/4.0/deed.fr
- dc.subject - en
- Health
- Coronavirus diseases
- Immunization
- dc.subject - fr
- Santé
- Maladie à coronavirus
- Immunisation
- dc.subject.en - en
- Health
- Coronavirus diseases
- Immunization
- dc.subject.fr - fr
- Santé
- Maladie à coronavirus
- Immunisation
- dc.title - en
- Accuracy of self-reported COVID-19 vaccination status compared with a public health vaccination registry in Québec : observational diagnostic study
- dc.type - en
- Article
- dc.type - fr
- Article
- local.acceptedmanuscript.articlenum
- e44465
- local.article.journaltitle - en
- JMIR Public Health and Surveillance
- local.article.journalvolume
- 9
- local.pagination
- 1-15
- local.peerreview - en
- Yes
- local.peerreview - fr
- Oui
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