Reducing Vaccine Hesitancy (VH) And Vaccine Refusal (VR): Its' Correlation Factors and an Educational Intervention Programme

Research Objectives

1. Examine the association among vaccination intention, attitudinal belief, subjective norms, perceived behavioral control, vaccine hesitancy and its reasons among the Malaysian population.
2. Develop an educational intervention Programme on COVID-19 vaccination to increase knowledge, positive attitudes, and acceptance toward COVID-19 vaccination
3. Assess the effectiveness of the educational intervention programme

Research Hypothesis

The hypotheses are:

1. The Ministry of Sciences and Technology (2021) reported that the percentage of Malaysians who voluntarily registered for the COVID-19 vaccine is still low. The researcher, therefore, hypothesize that the level of knowledge, positive attitudes, and acceptance towards the COVID-19 vaccine among Malaysian population to be rather low.
2. The researcher hypothesize that there is an association among vaccination intention, attitudinal belief, subjective norms, perceived behavioral control, vaccine hesitancy and its reasons among the Malaysian population
3. The researcher hypothesize that the educational intervention programme has a statistically significant effect on reducing vaccination hesitancy and vaccination refusal between the baseline and the assessment soon after the program as well as at 3 months after the programme as compared to the control group)

The Study There are 2 phases in this study. Phase 1 is the cross-sectional study, while Phase 2 will look into the programme development and feasibility and the implementation of a cluster randomised controlled trial (RCT).

Phase 1 Cross-sectional Study

Study design \& procedure:

1. This cross-sectional study will utilize both online and paper questionnaire.
2. The sample will be recruited through both voluntary response sampling and snowball sampling methods. The survey will be sent out to Malaysian who are more than 18 years old in the online social media platforms.
3. To ensure the cross-sectional study to be effective, the researcher decided our sample size based on Krejcie \& Morgan (1970) method that has commonly and widely been used in simple random sampling studies for each sample. Thus, for a wide of 32 million of population in Malaysia, the researcher had targeted for a total of 384 participants are sufficient.
4. This cross-sectional study aims to examine the association among vaccination intention, attitudinal belief, subjective norms, perceived behavioural control, vaccine hesitancy and its reasons among the Malaysian population.

Study site and participants

1. The cross-sectional study will be taking place in online setting. A few social media platforms are chosen for this purpose such as Facebook, Instagram, WhatsApp, and et-cetera.
2. Recruitment materials and survey will be shared on the social medial platforms and advocate public to share among others who are eligible.

Phase 2 (a): Programme Development and Feasibility Study

Study design \& procedure:

1. A group of experts consisting of public health experts in health education, health psychology, and other health-care providers (communicable disease background) will hold online meetings (Focus Group Discussions) to develop the modules for the Programme based on literature review, best practices in the field and in consultation with public health experts and other ministerial departments.
2. For a focus group discussion (FGD) to be effective, the number of participants shall between 6-8 per group (Krueger \& Casey, 2002). The researcher will target 8 per group and organize up to 5 groups and/or when the researcher reach data saturation points.
3. The FGDs will aim to build the content and activities of the Programme. The core members of this research team will finalise the Programme structure, before holding a second online meeting with the experts involved to confirm its validity. This Programme will continue to be refined throughout the study based on the feasibility study results.

Phase 2 (b): Cluster Randomised Controlled Trial (RCT).

Study design \& procedure:

1. To evaluate the effectiveness of the Programme, a cluster randomised controlled trial with three assessment points (Baseline, immediate after intervention and 3-month follow-up) will be conducted with the materials and outcome measures listed.
2. This will be a study based on pre/post multiple time series study design.
3. Students from the School of Medical \& Life Sciences, Sunway University, Faculty of Social Sciences, Quest University International, Ipoh and Centre of Community Health Studies, UKM will be engaged in the design and development of the approved content. By doing so, students from various universities would have a chance to apply what they have learned in the classrooms into the real life.
4. Materials will be in the form of pamphlet, webinar content and SMS and in Bahasa Malaysia.

Sample size calculation:

1. Non-inferiority designed will be used to show that the new treatment is as effective but need not superior when compared to the standard treatment (Zhong, 2009).
2. For non-inferiority design, the formula is:
3. Based on the recent published results, non-response rate of standard vaccine rate is reported to be 7% (Khubchandani et al., 2021). Thus, sample size required would be:

• N= 2 x [(1.645+0.845)/0.1]2 x 0.07 x (1-0.07)
• N= 80.7 (approximately 81 participants)

1. Assuming a dropout rate of 20%, the researcher will recruit at least 100 participants in each category for each education material used, making a total of 300 for each site (Figure 1).

Study site and participants

1. The cluster randomised controlled trial with three parallel arms (i.e., 3 intervention groups ) will be performed in both West and East Coast Malaysia. One major health facility/university will be selected and approached.
2. Recruitment materials designed will be shared and distributed both online and offline to the health facilities, schools, churches, mosques, temples, NGOs, recreation malls and societies.