Assessment of COVID-19 Vaccine Acceptance and Reluctance Among Staff Working in Public Healthcare Settings of Saudi Arabia: A Multicenter Study

Objective The study aimed to evaluate the novel coronavirus disease 2019 (COVID-19) vaccination acceptance and reluctance among staff working in Saudi healthcare facilities. Methods A cross-sectional study was conducted during April – May 2021, among healthcare workers in five public hospitals under the National Guards Health Association located in Alahsa, Dammam, Jeddah, Madinah, and Riyadh. The study used a questionnaire in English language, which was distributed through official email communication among healthcare staff currently working at study venues. The data was analyzed using IBM SPSS v23. An ethical approval was obtained. Results A total of 1,031 responses were recorded. Most of the staff had both doses of COVID-19 vaccine (89%). The mean score for vaccine acceptance on a scale of 1 (strongly disagree) to 5 (strongly agree) was 3.55 ± 1.6. The mean score for vaccine reluctance on the same scale was 2.71 ± 1.05. Most participants mentioned safety (76.9%) and efficacy (56.3%) as vaccine concerns and believed that COVID-19 vaccine may not be effective because of changes in virus strain (55.5%). The variables of gender and nationality significantly affected vaccine acceptance, while age, gender, nationality, and profession significantly affected vaccine reluctance (p < 0.05). Conclusion Most healthcare staff were vaccinated, and a high acceptance for COVID-19 vaccination was reported. Several demographic factors affected the vaccine acceptance and reluctance.


INTRODUCTION
The novel coronavirus disease 2019 (COVID-19) pandemic has spread globally and infected millions across the globe, while many have lost their lives due to this infection (1). The world is in the midst of COVID-19 pandemic that is still evolving in terms of its infectiousness and transmissibility. Several new variants of the virus that have high transmission and capability to spread are reported in the scientific literature (2,3). Besides, the daily reporting of new cases and deaths attributable to COVID-19 is a common occurrence in the news media these days. This has propagated a sense of fear and anxiety among Saudi healthcare workers (4)(5)(6).
The emphasis and extensive coverage of COVID-19 in the media and the possibility of early availability of vaccine are unique in this pandemic (1). Besides, the disease has adversely affected the global economy owing to restrictions with regards to social interaction, work, and travel (7). Most of the countries already have strategies to respond to the pandemic crisis, including restrictions on social and large gatherings, travel bans, hand hygiene, and use of face mask. Significant improvement has been observed because of these measures. However, such strategies are not sustainable, and this requires a permanent solution such as medications or vaccines. Efforts are already being made for vaccine development. Therefore, the availability of a COVID-19 vaccine has heightened public excitement (1). It could be said that there is an expectation to return to a normal life post pandemic.
It is important to assess the reaction of healthcare workers toward a novel COVID-19 vaccine as it becomes available. The evaluation of the intent and observed behavior is essential to predict how the recovery from pandemic would take shape. Several studies have been conducted, which strived to report vaccine acceptance among healthcare staff. A study in Indonesia reported that healthcare professionals were more likely to accept a vaccine for COVID-19 (8). In Saudi Arabia, a study reported that >60% of the participants indicated their interest in receiving a COVID-19 vaccine, should it become available (9). However, the study was conducted among the general public and did not analyze the responses from a healthcare subject group specifically.
This study was conducted during the time when the vaccines against the viral infection were approved and prioritized for healthcare staff (10). At the time of this study, the first wave had passed and it was the beginning of the second wave. The healthcare staff were either in the process of receiving a vaccine or had received it. However, receiving vaccination may not be reflective of an individual's acceptance or reluctance as there may be other factors that shape an individual's perception about the vaccine. Such factors may include an individual agreeing to receive a vaccine as a requirement of a purpose such as essential travel during the pandemic. Moreover, some individuals may agree to receive a vaccine as they may believe that it is helpful; however, their confidence may depend on its safety and effectiveness. Therefore, it is important to report the confidence, i.e., acceptance and reluctance in a vaccine for COVID-19, among healthcare staff working in Saudi healthcare settings, as it would not only predict the shape of post-pandemic recovery but also highlight how this confidence would translate into public acceptance in future as healthcare professionals play a pivotal role in providing education and promoting awareness among patients and the general public.

Study Aim
The study strived to document whether the healthcare staff were willing to get vaccinated against COVID-19 disease, and/or report if there was any reluctance to vaccinate. The confidence of the staff was measured through documentation of three traits: the tendency toward registration for a vaccine, the acceptance of a vaccine, and the reluctance toward the same. Therefore, the study aimed to evaluate the confidence of healthcare workers toward COVID-19 vaccination.

Study Participants and Eligibility Criteria
The target participants for the study were healthcare staff working at the afore-mentioned venues. The staff who were employed in the above mentioned hospitals and deemed eligible for COVID-19 vaccination as per the Saudi health regulator's COVID-19 vaccination guidelines at the time of study were included. Participants who did not provide consent to participate were not included.

Sampling Strategy and Sample Size Calculation
The convenience sampling technique was used to collect data from the participants. Participants who had their contact emails available in the list containing organizational emails were contacted. The venue consisted of five public hospitals located in five cities across different regions of the country. It included all the workers of these hospitals. The sample size was calculated using a sample size calculator (11). The margin of error was considered at 3%, while the confidence level was kept at 95%. The required sample size was 1,014. Since the data was collected online, the aim was to gather data more than the required sample size to account for any unforeseen circumstance such as incomplete surveys. An error rate of 10% was included in the final sample. The final sample size was 1,127. The survey analyzed 1,031 complete responses.

Research Instrument
The research instrument used in this study was a questionnaire. It was developed after review of relevant literature (12)(13)(14)(15)(16).
Additionally, opinions from practicing healthcare professionals in Saudi healthcare settings were also considered in creating questions. The questionnaire consisted of four sections. The first section was the socio-demographic section that contained questions related to age, gender, marital status, education, nationality, profession, work experience, and workplace. The number of items in this section was 8. The second section contained items related to registration for a vaccine and vaccination status. The number of items in this section was 5. The third section was related to vaccine acceptance and contained 5 items. The last section contained items related to reluctance and concerns and had 8 items.
Mean scores for the acceptance and reluctance toward COVID-19 vaccine were calculated. Items related to vaccine acceptance included belief about importance of vaccine to address the COVID-19, acknowledging the pandemic as a serious health issue in the country, confidence in the accuracy of a vaccine, willingness to get vaccinated upon availability of a COVID-19 vaccine, and willingness to vaccinate family members upon availability of a COVID-19 vaccine. Items related to vaccine reluctance included reluctance to vaccinate, concerns about the possible adverse effects, and concerns about the rushed pace of vaccine development overlooking potential adverse effects. All items were designed as Likert scale from 1 to 5, where 1 meant strongly disagree while 5 meant strongly agree. A mean score was calculated from these items. Some items were dichotomous, i.e., contained a Yes/No response, and were not included in scoring.
The questionnaire was available in English language as it was the primary means of communication among the employees at the study venues. The questionnaire was also piloted on 15 participants before the actual study. Healthcare professionals, academicians, and students participated in the pilot study. The instrument was piloted on 7 pharmacists, 3 medical practitioners, 3 academicians, and 2 pharmacy students. All participants, except students, had at least 3 years of work experience. No difficulty in understanding of the questions was observed. The pilot data was not included in the actual study.

Data Collection
Data for the study was collected from the staff using the questionnaire. The survey was encoded by the data management section of the institute using Lime Survey platform, in a weblink, and was distributed via email through the corporate communication office of MNGHA. Several email reminders were sent later using the same staff list to increase the response rate to achieve the desired sample size. The data collected was anonymous, and the respondents could not be identified from their responses.

Data Analysis and Management
Data analysis was done through IBM SPSS program version 23. The descriptive statistics such as mean, median, and standard deviation (SD) were used for reporting continuous data, while frequency (%) and sample counts (N) were used to report categorical data. The variables of "vaccine acceptance" and "vaccine reluctance" were the dependent variables. Simple and multiple linear regression analyses were employed to report the significance predictors of vaccine confidence. The level of significance was 5%.
The data was without any personal identifiers, and the data file was password protected. It was sent through official communication and stored in a password-protected computer. Any hardcopies created during analysis were securely disposed.

Ethics Approval and Consent
The study was approved by the Institutional Review Board at the King Abdullah International Medical Research Center (KAIMRC), Saudi Arabia, on 10th April, 2021. The study number was NRA21A/015/03 and the memo reference number was IRBC/0804/21. The approval was applicable to all healthcare facilities. The questionnaire was filled through an email link sent through official communication. The survey was accessible to participants after they reviewed the study consent section and agreed to participate voluntarily.
The majority (N = 935, 90.7%) registered themselves on the web application for vaccination, while more than half (N = 697, 67.6%) strongly agreed that they were willing to register immediately upon announcement. Slightly more than a third of participants (N = 337, 32.7%) registered themselves on the web application between 1 and 3 months. Majority had taken an influenza vaccine (N = 811, 78.7%) and both doses of COVID-19 vaccine at the time of data collection (N = 918, 89%) ( Table 2).
For the participant's view of vaccine acceptance, the mean score was 3.55 (3.45-3.65 for 95% confidence interval [CI], 1.60 SD). The Cronbach's alpha value of the items was 0.979 that highlighted an acceptable reliability. The mean score for several items related to the COVID-19 vaccine acceptance are mentioned in Table 3.
For the participant's view of vaccine reluctance, the average mean score of the three items related to the COVID-19 vaccine reluctance was 2.71 (2.65-2.78 for 95% CI, 1.05 SD). The Cronbach's alpha value of the items was 0.715 that highlighted an acceptable reliability. The mean score for several items related to the COVID-19 vaccine acceptance are mentioned in Table 4.
The model for COVID-19 vaccine acceptance revealed that gender and nationality were significant predictors after adjusting   experience were non-significant when adjusted for demographic characteristics of participants ( Table 6).
Simple regression revealed that except for the master level of education, all variables including participants' age, It was observed that most of the staff were quite positive toward vaccination, as more than 90% mentioned that they registered themselves for vaccination through the web application as soon as it became available. At the time of data collection, almost 90% of the respondents had taken their second dose. In this context, a study among healthcare workers in the US reported that out of every 20 participants surveyed, 3 were found to be hesitant (17). On the other hand, another study in the same population in Germany reported a vaccine acceptance of 91% (18).
Secondly, the respondents showed good acceptance of COVID-19 vaccine, as the average mean score for the items regarding the same was 3.55 out of 5. In this context, a study among healthcare workers in the neighboring country of the UAE reported that vaccine acceptance was high (>89%) (19). Similar finding was reported from the same population in Kuwait (20). The staff shared their opinion that vaccine was important in addressing the pandemic, and acknowledged it as a serious issue in the country. Several studies conducted among the general population of Saudi Arabia reported an increased readiness to vaccinate, and most participants held positive perceptions about the vaccines. However, a sizeable portion of the population also showed their reluctance with concerns regarding safety (21). Another study conducted among a small sample of healthcare workers in Saudi Arabia highlighted that 50% were willing to receive a vaccine, out of which roughly 49% seemed willing to receive it immediately upon availability (22). Another study reported an acceptance of roughly 65% (23). However, the timeline of data collection for both studies was up to December 2020. Our study has been relatively recent and highlights that this acceptance greatly increased and literally doubled in the following year. Such an occurrence shows the increase in confidence of healthcare staff toward vaccination.
The Organization for Economic Cooperation and Development (OECD) mentions that public trust in vaccines against COVID-19 is as important as the effectiveness of the vaccines, and the actions of the governments to increase this trust could be a determinant for their success (24). According to published sources, Saudi health authorities approved the use of vaccine for preventing COVID-19 as early as December 2020 and prioritized geriatrics and healthcare workers to receive the vaccine (25). Later, two more vaccines were approved for use (23). Moreover, the health authority launched the web applicaton to register for receiving a vaccine. The receipients were able to book a date as early as 24 h (26). Such measures were pivotal in increasing the uptake of vaccines by the residents. Hence, these might be the reasons as to why there was an increase in acceptance compared to previous studies. However, this change also points to the fact that such opinions toward vaccination have been largely fluid and may not be consistent. Therefore, it is imperative that such measures are continued to ensure that acceptance remains consistent or improves further. Further, it was reported that the average mean score for reluctance toward a COVID-19 vaccine was 2.71 out of 5. Although it was low, and given the fact that 90% of the participants received a vaccine, it still cannot be ignored. A high mean score >3 was observed for the statement regarding worry about adverse effects of vaccine. This apprehension was also reported by participants in previous studies (21,23). Moreover, another statement with a high mean score for reluctance >3 was about the failure to detect dangerous adverse effects due to the rushed pace of vaccine development. This occurrence was also witnessed as health regulators found rare adverse effects such as blood disorders and myocarditis as a consequence of receiving COVID-19 vaccines (27,28). To this end, a study in Qatar reported that a small proportion of healthcare workers, roughly 13%, had vaccine hesitency (29).
An important finding was that more than half of the participants were of the view that the vaccine may not remain effective owing to the mutations that occur in a circulating virus. The healthcare workers in Qatar also had doubts over vaccine's protection (29). According to the World Health Organization (WHO), the currently available vaccines may not become completely ineffective in the face of emerging variants and would continue to offer reasonable protection against these new variants. However, it is imperative that measures are taken to reduce the spread so as to reduce the likelihood of the virus to mutate into a new variant (30).
There is a massive drive for vaccination in MNGHA hospitals. The organization had a dedicated vaccination center in each hospital for staff at the time of writing. Therefore, vaccine related information is readily availabile and accessible. The availability of vaccine is ensured within the hospital. This study had a limitation. It was not possible to estimate the response rate and at the same time, considering the online nature of study, the response is usually low. Several email reminders were sent to overcome the issue of a low response rate. We estimate that our response rate was lower than 70%.

CONCLUSION
The findings of this study reveal that most participants were vaccinated and expressed confidence in COVID-19 vaccination. Some of the apprehensions such as adverse effects and effectiveness of vaccines on variants of COVID-19 virus were genuine and were true in retrospection. Several demographic factors affected the vaccine acceptance and reluctance.

DATA AVAILABILITY STATEMENT
The datasets presented in this article would be available from corresponding author upon suitable request. Requests to access the datasets should be directed to AL, azfar.hd@hotmail.com.

AUTHOR CONTRIBUTIONS
MM: conceptualization, interpretation and writing-original draft, revision, and editing. MI: conceptualization, methodology, analysis, validation and writing-review original draft, revision, and editing. AA: conceptualization, interpretation and writing-original draft, revision, and editing, proposal review, ethics review process, critical review of manuscript, and feedback. ZN: writing, critical review of manuscript, revision, and feedback. NA: methodology, writing, critical review of manuscript, and feedback. MA: writing, results, critical review of manuscript, and feedback. MH and AM: conceptualization, methodology and writing-review, and editing. NF: conceptualization, interpretation, critical feedback, and editing. MAA and FA: proposal review, ethics review process, critical review of manuscript, and feedback. ZA: conceptualization, interpretation, methodology, results, and writing-original draft and editing. All authors agreed on the final version for submission.

ACKNOWLEDGMENTS
We extend our gratitude to all the participants for taking out time and responding to our survey. It would not have been possible without their help. We also wish to thank all the IT staff for their help in carrying out the electronic survey.