Our study found that the index cases and caregivers’ perceptions of participating in a COVID-19 study demonstrated an adequate understanding of what COVID-19 is, and what medical studies are, as well as expressed understanding of the recruitment procedure. The enablers to participation included access to medical services, COVID-19 knowledge level, financial reimbursements, and advancing the science of COVID-19. The barriers to participation included suboptimal financial reimbursements, invasion of privacy, testing procedures, and the commonly cited barrier being discrimination/stigma and minimal study publicity.
Perceptions of medical studies and recruitment approaches
Findings from the study demonstrate that the participants had an overall understanding of what COVID-19 was, as well as what medical studies entail. Good knowledge levels about a disease are a key factor for them getting infected or not and help them understand the study needs when approached(17). In our study, most of the index cases and caregivers showed an understanding of what COVID-19 is which accelerated their willingness to participate in the study. This heightened level of understanding could be explained by the higher literacy level of the participants that were recruited in this study.
Participation in research must be voluntary(18) and in a manner that offers participants adequate time and the ability to freely consider whether or not they wish to take part. Undue pressure because of the timing of the request, who makes the request, the method of request, or the offering of undue inducements should be avoided (18). Our findings show that the index cases and caregivers were properly recruited by the SCATHIM research staff who gave them adequate information as well as presented them with consent forms. An earlier European study revealed that a well-conversed research team is key in the recruitment team as they will be able to share the right information with the participants (19). This means that the research stuff were well trained on recruitment procedures and giving adequate information to potential participants before recruitment.
Enablers of participation in a COVID-19 study
Our findings revealed that caregivers indicated that their patients (index cases) chose to participate largely because they wanted to access better treatment. Similarly, another study in Brazil found that many study participants enroll in clinical studies because they believe that they will have improved access to health care and better quality of care (20). The participants believe that they will be better able to check up on their health and will be able to avoid the time that they would spend in the public health sector. Moreover, the ability to call a study physician at any time is attractive to most patients (20) which was also a shared feeling among our respondents. The need for easy access to medical services could have largely been influenced by the increase in cases and deaths due to COVID-19 at the time the mother study was conducted. The COVID-19 variant Beta Wave identified in South Africa was attributed to the second wave in Malawi which was also the time when the SCATHIM study was being conducted. The increase in the number of cases during this wave resulted in hospitals being overwhelmed, further resulting in substandard services offered to COVID-19 patients(21). This has been reported before in an earlier Malawian study where participants reiterated that their main motivator to participate in a study was the guarantee of better medical treatment (9). Respondents characterized normal health care in health centres as inadequate with limited diagnostic capabilities which compromises the treatment one gets which is further compromised by the lack of supplies like medications(9). Hence, studies that are perceived to provide additional care to participants in an infectious disease setting are more likely to attract easy participation.
Our findings showed that the quest to know the COVID-19 status of other household members as a way of controlling transmission amongst their households was another factor that motivated enrolment into the SCATHIM study. This finding is consistent with results from a multicentre study conducted in Egypt, Saudi Arabia, and Jordan, which showed that approximately 50% of study participants had positive attitudes toward participation in COVID-19 trials and the main factor that influenced public willingness was the desire to protect family members from COVID-19 from accelerating so that life may return to normal (22).
The finding further agrees with the TRA’s element of belief which states that a person’s attitude towards performing some behavior is a function of the beliefs that one holds regarding the behavior(23). In this case, participants believed that their choice to participate in the study was the solution to protecting their families.
Our study showed that most participants had a good understanding of COVID-19 and medical studies which played a factor in their willingness to participate which could also be further based on the participant's demographics. Similarly, a study in India was done to appreciate the awareness and understanding of rural and urban populations about the COVID-19 virus. The study illustrated that rural people are less aware of COVID-19 than urban people and contended that rural people need far more knowledge and awareness about COVID-19 for the prevention and control of infection(24). It may be the case that those in the urban areas are likely to be educated and therefore knowledgeable and concerned about their health and well-being, through access to more information sources, and become more engaged in life events that could impact them(24), such as COVID-19. The above finding is also consistent with the Theory of Reasoned Action (TRA) which assumes that human beings are rational and make systematic use of information available to them (25). Beliefs that people hold about a behavior follow reasonably from the information and knowledge people possess about the behavior under consideration. These beliefs originate in a variety of sources exposed to them, such as personal experience, formal education, radio, newspapers, TV, the Internet, and other media, and interactions with family (25).
Financial incentives as reported in our study have been suggested as a catalyst to increase the voluntary participation and testing of individuals and can play a vital role in limiting the rapid spread of the infection at a lower cost if monetary rewards are given(5). Contrary to our findings, a study carried out on the perception of reimbursement found that women who participated in the study believed that monetary reimbursement is unlikely to coerce an individual to volunteer for a study involving procedures or requirements that they found unacceptable (26). Agreeing further with this line of thought another study had the view that individuals are less willing or able to consider the risks of participation when monetary reimbursement is involved and described payment for research participation as just one part of the “informal economy” in poor communities (27). Nonetheless, it is important to note that the amount that the main study provided as re-imbursement, which was at 2USD, was not high enough to coerce someone to join the study and that’s why others were able to opt out solely on this financial incentive basis if the other factors, in their opinion were not strong enough to persuade them to join the study.
Contributing to generation of knowledge on managing COVID-19 disease was reported as another factor behind others choosing to participate in the study. Similarly, a study carried out to understand the motivation to participate in community studies found that participants saw value in research beyond the direct context of the study in how it contributed to basic science to understand something new (28). The study reported that generating knowledge that would be really helpful for medicine or the medical field is a motivating factor to participate in studies(28). Hence, researchers could utilize this by ensuring the informed consent form and process clearly highlights how participation in the study contributes to understanding of the disease and how the results will be used.
Barriers to participation in a COVID-19 study
Respondents in our study emphasized a lack of adequate publicity as a barrier to adequate participant recruitment. Public awareness and engagement are among the main prerequisites of successful research(29). Implementation of these principles requires concerted efforts from all stakeholders, including the public (29). Literature suggests that effective outreach to potential research participants, especially those who are difficult to access, requires a partnership approach with community-based influencers, media, and other relevant stakeholders (30). Engaging community members in research activities is crucial for meeting recruitment and enrollment goals and resolving key barriers (31). Using community leaders as champions and recruiters is a successful recruitment approach as they create trust among participants (31). Additionally, a study on chemical exposure in pregnant women found that online advertising, radio, TV, posters, and flyers at hospitals and clinics were the most successful recruitment strategies (32). Our findings and those of a previous study on public awareness and perception of clinical research in India indicate that creating public awareness changes attitudes towards, enrolment, and the benefits of participation (33). There is a need to increase public awareness and understanding of research to ensure its success while being compliant with all ethical considerations. In the main study, COVID-19 was associated with stigma and community reproach. Hence, needing to balance privacy and ensuring that many people get to hear about the study, the approach of contacting people directly was employed.
Our study found that some people were scared of being stigmatized by the communities if their sickness is for some reasons disclosed to the public. The fear of being stigmatized by being in the study may lead to being labeled as those spreading COVID-19. Research has shown that stigmatized persons are often associated with the nondisclosure of disease status (34), avoidance of medical care, and non-adherence to treatment to avoid discrimination (35). This may severely disrupt the efforts to manage any infectious disease outbreak(35). Similar findings regarding the impact of disease-related stigma on research efforts are reported in other research fields including HIV and mental health research (36). One study on HIV conducted in South Africa showed that 80% of the 400 patients with HIV that participated in the study did not feel comfortable disclosing their status due to fear of stigma (37). While there are limited studies related to social stigma among individuals inflicted by COVID-19, the SCATHIM decliners' experience could be like the persons affected by other infectious diseases such as HIV/AIDS and tuberculosis (38) where a large proportion of eligible patients refused to participate in a study because of high levels of stigma from society (38). These findings are consistent with the TRA’s tenet on subjective norms as an influencer of one’s intent toward a behavior. Subjective norms involve individuals’ beliefs about the extent to which other people surrounding them think they should or should not perform behaviours (25). Subjective norms could explain the high refusal rates that were experienced during recruitment in the SCATHIM study because most of the decliners made their decision based on what others would or said. However, for those that chose to participate in the SCATHIM study, the theory also points out that sometimes even if others prescribe a certain behavior, one may still not be motivated to comply.
The concerns raised by regulatory bodies in South Africa are similarly illustrated by our findings, which indicate that a greater incentive value may have led to increased participation in the study (39). For instance, the South African Medical Council advocated for the introduction of flat rates that compensate participants only for their time, inconvenience, and expenses (39). The assertion by the medical council was not favorably received by the community members as it translated into reduced reimbursements (39). Additionally, a study in Kenya where reimbursement amounts were discussed, zero payments were deemed unfair and high reimbursements evoked suspicion among the prospective participants (40). However, participants of a study conducted in America viewed substantial financial incentives as a benefit and did not perceive them as coercive or suspicious but rather as compensation for their time (26). The importance of considering substantial financial incentives as a strategy to retain participants in longitudinal studies was similarly acknowledged by the participants in our study showing that participants will be motivated to enroll in a study when an incentive is brought into the picture. Contrary to our findings, a study done in the USA found that monetary reimbursement is unlikely to coerce an individual to volunteer for a study involving procedures or requirements that they found unacceptable no matter the amount being offered (35).
Building trustful relationships between researchers and participants is an essential value in research. This can therefore contribute to the authenticity of the study(35). Though this was done in the SCATHIM study by presenting the participants with the consent forms highlighting the privacy obligations of the researchers on whatever was to be shared with research staff, the study findings still indicated that the decliners felt their health issues were not for others to know leading to their denial in participation. In relation to this finding, a study on perspectives regarding privacy in clinical research found that when potential research participants are directly contacted by the research team after having accessed their medical records to determine which patients meet study criteria, the researchers’ access to these records violated informational privacy hence leading to the prospective participants not interested to participate in their research(41). Furthermore, findings of a study on barriers to recruitment of HIV infected people in clinical studies further found that the need for privacy in one’s status was a more potent barrier to recruitment than having others learn of their other habits such as substance use disorder. Prospective study participants were concerned about their status being exposed and family and community members discovering their HIV status because they participated in the clinical trials (42). This further means that low enrollment rates in studies can be attributed to the fear of personal information being exposed to a wider audience, as indicated by the findings.
The fear of an invasion of privacy can be linked to attitude, another element of TRA as a reason not to participate. According to the theory, attitude formation is the process by which a large set of specific beliefs, which has been associated with behavior over time, informs an overall sense of favorableness toward the behavior (25). Attitude is a multiplicative combination of behavioral beliefs, which are perceptions of the likelihood that performing a particular behavior will have certain consequences (25). In this case, the idea that participating in the SCATHIM study would lead to the consequence where their health status being known by others led to forming the attitude that participation would breach their privacy.
The COVID-19 nasal swab testing procedure used in the study was a barrier to participation. Similarly, participants in a study carried out to identify perceived barriers to COVID-19 testing in the USA described their perceptions that the nasopharyngeal swab method was too painful, echoing what has been reported by the media (43). Even those who had not been tested were deterred from testing because of their fear of the pain associated with the nasopharyngeal swab. The study further found that among all sources of samples tested, those obtained from the lower respiratory tract and nasopharyngeal area are viewed to have the highest sensitivity, compared to saliva, sputum, blood, and faeces (43).
Our theoretical framework however points out that behavioral intention is the most immediate determinant of behavior. It is defined as people’s readiness to perform a behavior(25). This intention comes because of a belief that performing the behaviour will lead to a specific outcome. It can also be attributed that the decision by the index cases and caregivers to participate was determined by one’s intention to want to participate disregarding the discomfort that comes along with the process.
Strengths and limitations
This study collected data from SCATHIM research staff through in-depth interviews, who provided a better understanding of the subject from key stakeholders who interacted with index cases, caregivers, and decliners, as well as sharing their own experiences in the study which was deemed as a strength for the study. However, the study faced limitations due to misconceptions about the study being coercive, particularly among SCATHIM decliners who had previously declined to participate in the mother study.