Effective Public Health Communication to Influence COVID-19 Vaccination Intent and Message Propagation: A Randomized Controlled Experiment
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 5,784
- 试验地点
- 1
- 主要终点
- Change in intent to recommend the COVID-19 vaccine to healthy adults.
研究概览
简要总结
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- Single (Participant)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •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
排除标准
- •Received at least one COVID-19 vaccination dose
研究组 & 干预措施
Descriptive Norm (70%)
Intervention in the form of a message likened to a social media post. Composed of 3 parts:
- Opening tag line highlighting the main concern that Malaysians have about the COVID-19 vaccine (safety and side effects)
- Message content describing that about 70% of Malaysians have expressed acceptance for the COVID-19 vaccine.
- Rally slogan: "It's safe and effective!"
干预措施: Health message exposure (Behavioral)
Descriptive Norm
Intervention in the form of a message likened to a social media post. Composed of 3 parts:
- Opening tag line highlighting the main concern that Malaysians have about the COVID-19 vaccine (safety and side effects)
- Message content describing that the COVID-19 vaccine has been widely tested including with the elderly and people with existing health conditions, while subsequently highlighting that the vaccine was already received by millions worldwide.
- Rally slogan: "It's safe and effective!"
干预措施: Health message exposure (Behavioral)
Healthcare worker (HCW) recommendation
Intervention in the form of a message likened to a social media post. Composed of 3 parts:
- Opening tag line highlighting the main concern that Malaysians have about the COVID-19 vaccine (safety and side effects)
- Message content highlights recommendation from Malaysian healthcare workers to get the vaccine, since majority of them has already received it, including the Malaysian Health Director General
- Rally slogan: "It's safe and effective!"
干预措施: Health message exposure (Behavioral)
Negative attribute framing
Intervention in the form of a message likened to a social media post. Composed of 3 parts:
- Opening tag line highlighting the main concern that Malaysians have about the COVID-19 vaccine (safety and side effects)
- Message content describing the rate of side effects occurring with COVID-19 vaccination in a negative frame.
- Rally slogan: "It's safe and effective!"
干预措施: Health message exposure (Behavioral)
Positive attribute framing
Intervention in the form of a message likened to a social media post. Composed of 3 parts:
- Opening tag line highlighting the main concern that Malaysians have about the COVID-19 vaccine (safety and side effects)
- Message content describing the rate of side effects occurring with COVID-19 vaccination in a positive frame.
- Rally slogan: "It's safe and effective!"
干预措施: Health message exposure (Behavioral)
Risky choice framing (Safety)
Intervention in the form of a message likened to a social media post. Composed of 3 parts:
- Opening tag line highlighting the main concern that Malaysians have about the COVID-19 vaccine (safety and side effects)
- Message content describing a risky choice frame which compares the death rates occurring with COVID-19 vaccination versus contracting the virus itself.
- Rally slogan: "It's safe and effective!"
干预措施: Health message exposure (Behavioral)
Risky choice framing (Side effects)
Intervention in the form of a message likened to a social media post. Composed of 3 parts:
- Opening tag line highlighting the main concern that Malaysians have about the COVID-19 vaccine (safety and side effects)
- Message content describing a risky choice frame that compares the incidence rates of blood clots occurring with COVID-19 vaccination versus contracting COVID-19.
- Rally slogan: "It's safe and effective!"
干预措施: Health message exposure (Behavioral)
Control message
Control message containing only rally slogan: "It's safe and effective!"
干预措施: Health message exposure (Behavioral)
Combination message: Descriptive Norm (70%) + Descriptive Norm
Participants received 2 messages which were exposed one at a time. Sequence of message appearing randomly rotated.
干预措施: Health message exposure (Behavioral)
Combination message: Descriptive Norm (70%) + HCW recommendation
Participants received 2 messages which were exposed one at a time. Sequence of message appearing randomly rotated.
干预措施: Health message exposure (Behavioral)
Combination message: Descriptive Norm (70%) + Negative attribute framing
Participants received 2 messages which were exposed one at a time. Sequence of message appearing randomly rotated.
干预措施: Health message exposure (Behavioral)
Combination message: Descriptive Norm (70%) + Positive attribute framing
Participants received 2 messages which were exposed one at a time. Sequence of message appearing randomly rotated.
干预措施: Health message exposure (Behavioral)
Combination message: Descriptive Norm (70%) + Risky choice framing (Safety)
Participants received 2 messages which were exposed one at a time. Sequence of message appearing randomly rotated.
干预措施: Health message exposure (Behavioral)
Combination message: Descriptive Norm (70%) + Risky choice framing (Side effects)
Participants received 2 messages which were exposed one at a time. Sequence of message appearing randomly rotated.
干预措施: Health message exposure (Behavioral)
结局指标
主要结局
Change in intent to recommend the COVID-19 vaccine to healthy adults.
时间窗: 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.
时间窗: 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.
时间窗: 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 yes"to Definitely yes".
Change in intent to recommend the COVID-19 vaccine to elderly.
时间窗: 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.
时间窗: 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".
次要结局
- Reliability of various information sources about COVID-19.(Immediately after message exposure during questionnaire administration.)
- Moderators of vaccination intent.(Immediately after message exposure during questionnaire administration.)
研究者
Nicholas Hing Yee Liang
Researcher, Principle Investigator, Pharmacist
Clinical Research Centre, Malaysia