The Impact of Theory-based Messaging on Covid-19 Vaccination Intentions

Covid19 Clinical Trial

Official title:

The Impact of Theory-based Messaging on Covid-19 Vaccination Intentions

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04813770
• Other study ID #: 200200052
• Status: Completed
• Phase: N/A
• Start date: April 6, 2021
• Est. completion date: April 26, 2021

Study information

• Verified date: May 2021
• Source: University of Glasgow
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Uptake of vaccination against COVID-19 is key to controlling the pandemic. However, a significant proportion of people report that they do not intend to have a vaccine, often because of concerns they have about its side effects or safety. It is important to identify ways to communicate information about the vaccines that facilitate informed decisions rather than promoting uptake through coercion. This study will assess whether theory-based messages can change beliefs and increase intentions to receive a COVID-19 vaccine in Scotland. The messages will be based on publicly available information about the need for COVID-19 vaccination and the safety of the vaccines, and structured to address specific types of treatment beliefs. Participants will be randomised to either a group shown the messages or a control group shown general information messages about the COVID-19 virus and vaccination programme. By comparing the two groups we aim to test what impact the theory-based messages have on intentions and beliefs about COVID-19 vaccination.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 1113
• Est. completion date: April 26, 2021
• Est. primary completion date: April 26, 2021
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Willing and able to give informed consent for participation in the trial

• Aged 18 years or above

• Resident in Scotland

Exclusion Criteria:

• Received at least one COVID-19 vaccination dose

Related Conditions & MeSH terms

• Covid19
• Vaccination

Intervention

Behavioral:
• Theory-based messages
COVID-19 vaccination information structured to address vaccination necessity and concerns.
• General messages
General messages about the COVID-19 virus and the vaccination programme.

Locations

Country	Name	City	State
United Kingdom	University of Glasgow	Glasgow

Sponsors (1)

Lead Sponsor	Collaborator
University of Glasgow

Country where clinical trial is conducted

United Kingdom, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Covid-19 vaccination intention measured by a single item and aggregated as the proportion of intenders.	Participants will be asked: "If you were invited to have a COVID-19 vaccination would you take the vaccine?" Those responding "yes, probably" or "yes, definitely" will be treated as intenders. Those responding "don't know", "probably not" or "definitely not" will be treated as non-intenders.	Immediately post-intervention
Secondary	Mean COVID-19 illness coherence score as assessed by the IPQ-R	Self-reported COVID-19 illness coherence as assessed by the the illness coherence subscale of the revised Illness Perception Questionnaire (IPQ-R), with a minimum score of 5, a maximum score of 25 and a higher score representing greater personal understanding of COVID-19.	Immediately post-intervention
Secondary	Mean perceived necessity score as assessed by the BMQ	Self-reported perceived necessity of a COVID-19 vaccine as assessed by the Specific-Necessity subscale of the Beliefs about Medicines Questionnaire (BMQ), with a minimum score of 5, a maximum score of 25 and a higher score representing greater perceived necessity of a COVID-19 vaccine.	Immediately post-intervention
Secondary	Mean perceived concerns score as assessed by the BMQ	Self-reported perceived concerns about a COVID-19 vaccine as assessed by the Specific-Concerns subscale of the Beliefs about Medicines Questionnaire (BMQ), with a minimum score of 5, a maximum score of 25 and a higher score representing greater perceived concerns about a COVID-19 vaccine.	Immediately post-intervention