Health Communication to Influence COVID-19 Vaccination Intent and Message Propagation

Effective Public Health Communication to Influence COVID-19 Vaccination Intent and Message Propagation: A Randomized Controlled Experiment

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT05244356

Acronym

CONVINCE

Enrollment

5784

Registered

2022-02-17

Start date

2021-04-29

Completion date

2021-06-07

Last updated

2022-02-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Behavior, Health, Coronavirus Infections, COVID-19, Infectious Disease, Lung Diseases, Pneumonia, Pneumonia, Viral, Respiratory Disease, Respiratory Tract Infections, Vaccine Refusal

Keywords

message, messaging, propagation, intent, vaccine, recommend

Brief summary

This is a randomised controlled experiment in the form of a web based survey study which randomly exposes participants to different forms of public health messages, after which participants will be assessed on their intent to take up the COVID-19 vaccine, recommend the vaccine, and also willingness to propagate the exposed message.

Interventions

BEHAVIORALHealth message exposure

Participants exposed to a health message and requested to read it completely. Subsequently requested to answer post intervention questions that form basis for outcome measures.

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

OTHER

Masking

SINGLE (Subject)

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* Willing and able to give informed consent for participation in the trial * Malaysian nationality. * Can understand either the English or Malay language. * Aged 18 years or above

Exclusion criteria

* Received at least one COVID-19 vaccination dose

Design outcomes

Primary

Measure	Time frame	Description
Change in intent to recommend the COVID-19 vaccine to healthy adults.	Immediately before and after message exposure during questionnaire administration.	Outcome measure was assessed using a questionnaire answered through a 5 point ordinal scale. Scale ranges from Strongly disagree, Disagree, Not sure, Agree, and Strongly agree.
Change in intent to recommend the COVID-19 vaccine to people with existing health conditions.	Immediately before and after message exposure during questionnaire administration.	Outcome measure was assessed using a questionnaire answered through a 5 point ordinal scale. Scale ranges from Strongly disagree, Disagree, Not sure, Agree, and Strongly agree.
Intent to share message on social media platform.	Immediately after message exposure during questionnaire administration.	Outcome measure was assessed using a questionnaire answered through a 5 point ordinal scale.Scale ranges from Strongly disagree, Disagree, Not sure, Agree, and Strongly agree.
Change in intent to accept the COVID-19 vaccine amongst the Malaysian adult population.	Immediately before and after message exposure during questionnaire administration.	Outcome measure was assessed using a questionnaire answered through a 4 point ordinal scale. Scale ranges from 'Definitely no, Not sure, but probably no, Not sure, but probably yesto Definitely yes.
Change in intent to recommend the COVID-19 vaccine to elderly.	Immediately before and after message exposure during questionnaire administration.	Outcome measure was assessed using a questionnaire answered through a 5 point ordinal scale. Scale ranges from Strongly disagree, Disagree, Not sure, Agree, and Strongly agree.

Secondary

Measure	Time frame	Description
Reliability of various information sources about COVID-19.	Immediately after message exposure during questionnaire administration.	Outcome measure assessed using a questionnaire that list out various types of information sources and having participants to rate the reliability for each source using a 5 point ordinal scale. Scale ranges from Strongly not reliable, Not reliable, Not sure, Reliable, and Strongly reliable.
Moderators of vaccination intent.	Immediately after message exposure during questionnaire administration.	Outcome measure assessed using a series of questions answered through a 5 point ordinal scale. Scale ranges from Strongly disagree, Disagree, Not sure, Agree, and Strongly agree.

Countries

Malaysia

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 12, 2026