Skip to main content
OpenTrials
Completed

NCT Number: NCT04813770

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

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.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Vaccination Behavior COVID-19 Coronaviridae Infections Coronavirus Infections Covid19 Health Behavior Infections Lung Diseases Nidovirales Infections Pneumonia Pneumonia, Viral RNA Virus Infections Respiratory Tract Diseases Respiratory Tract Infections Treatment Adherence and Compliance Treatment Refusal Vaccination Hesitancy Vaccination Refusal Virus Diseases

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University of Glasgow

Glasgow, United Kingdom

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Theory-based messages

Behavioral

COVID-19 vaccination information structured to address vaccination necessity and concerns.

General messages

Behavioral

General messages about the COVID-19 virus and the vaccination programme.

Primary outcomes

  1. Covid-19 vaccination intention measured by a single item and aggregated as the proportion of intenders.

    Time frame: Immediately post-intervention

    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.

Secondary outcomes

  1. Mean COVID-19 illness coherence score as assessed by the IPQ-R

    Time frame: Immediately post-intervention

    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.

  2. Mean perceived necessity score as assessed by the BMQ

    Time frame: Immediately post-intervention

    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.

  3. Mean perceived concerns score as assessed by the BMQ

    Time frame: Immediately post-intervention

    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.

Sponsors and collaborators

Lead sponsor

University of Glasgow

Other

Registry information

Important dates

Study start
2021
Primary completion
2021
Study completion
2021
First posted
Mar 24, 2021
Registry last updated
May 10, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.