Addressing health literacy needs in COVID-19 risk communication

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The digital Covid Risk Calculator (CoRiCal) tool has been developed by a team of Australian GPs and epidemiologists in collaboration with the Immunisation Coalition to facilitate informed choice about COVID-19 vaccination risk and benefits: https://corical.immunisationcoalition.org.au. The study will be a randomised experiment, to investigate the impact COVID vaccine information on participants understand. The aim of this study is to improve the risk communication interface for CoRiCal, to ensure Australians with varying health literacy have access to updated evidence on COVID-19 vaccination benefits and risks in a form they can understand and act on. Key research questions will be: 1.Does the standard CoRiCal website output increase knowledge about COVID-19 vaccination compared to control 2.Do video explanations increase knowledge about COVID-19 vaccination compared to standard CoRiCal output 3.Does the absolute risk format increase knowledge and intention compared to 1 in x format This study is a survey which will be conducted online through the Qualtrics platform. Participants will be recruited from the general Australian public using a market research company, Dynata. Once they have read the PIS and Consent form and given consent, participants will complete a 10-minute survey. Participants will answer demographic questions and then will be randomised to receive one of three interventions or a control. This will take about 5 minutes to complete. Immediately following this, they will be asked our outcome questions, which will also take about 5 minutes to complete. Therefore the complete survey will take about 10 minutes in total. They will receive a debriefing document at the end to explain the aims of the study and that the data is based on current evidence but may not apply to their own situation, with references for reliable and updated information. Participants are told in the PIS that the results of the study will be posted on the research group website (https://sydneyhealthliteracylab.org.au). TRIAL UPDATE: The trial is now completed and published as: Carissa Bonner, Melody Taba, Michael Anthony Fajardo, Carys Batcup, Ben R. Newell, Amy X. Li, Helen J. Mayfield, Colleen L. Lau, John C.B. Litt, Using health literacy principles to improve understanding of evolving evidence in health emergencies: Optimisation and evaluation of a COVID-19 vaccination risk-benefit calculator, Vaccine, Volume 42, Issue 24, 2024, 126296, ISSN 0264-410X, https://doi.org/10.1016/j.vaccine.2024.126296.

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