A qualitative investigation of reasoning behind decisions to decline participation in a research intervention: A study-within-a-trial

Abstract

The current study-within-a-trial explored individuals’ decisions to decline participation in research trialling a chronic illness-focused therapy (i.e. multiple sclerosis). Four themes were identified from seven semi-structured interviews with participation decliners and were confirmed by the host trial’s Patient & Public Involvement (PPI) panel: acknowledgement of the value of research; ‘fit’ of the study; misinterpretation of participant information; and ‘ignorance is bliss’ – discussed in light of theory and research. This study-within-a-trial extends research on trial recruitment and participation decline; while also suggesting that PPI can be utilised in both a practical and impactful manner.

Background

Randomised Controlled Trials (RCTs) are often considered the gold standard of clinical trials (Hariton and Locascio, 2018), generally consisting of a systematic research strategy for determining an intervention’s efficacy. However, recruitment of participants to a RCT can be a challenging process; for example, with respect to achieving the pre-determined sample necessary to reliably derive conclusions (e.g. so as to avoid false-negative results in light of statistical non-significance). Thus, the enhancement of recruitment strategies has become an important objective in many RCT designs, as research suggests that poor recruitment rates often result in elevated cost and prolonged use of ineffective or potentially harmful extant interventions (Huang et al., 2018; Hughes-Morley et al., 2016).

One potential method of better understanding strategies for recruitment (and perhaps subsequent retention) is the exploration of the views of those who declined to participate in a RCT. However, this method is often overlooked given the substantial lack of research evaluating the reasoning behind refusal to participate in research and RCTs in particular (e.g. Barnes et al., 2012; Canvin and Jacoby, 2006). Notably, of the few studies that have assessed participation decline/refusal, many have done so quantitatively (e.g. Blanch et al., 2008; Harrison et al., 2016; Langford et al., 2014); however, given that the data to be assessed, in this context, come from individuals who decline to further participate, it is often the case that these data are few and limited – for example, to demographic information only. Thus, a substantial portion of extant research in this area lacks detail regarding the reasons individuals decline to participate, such as that which might be garnered through subsequent qualitative data collection. Nevertheless, the dearth of research that has been conducted suggests that potential participants’ perceptions should be accounted for, including patient perceptions of the intervention’s potential efficacy (Arfken and Balon, 2011).

While some qualitative research has explored more detailed reasons for declining (e.g. negative feelings and experiences influencing perception of the therapy; perceived ineligibility; and misunderstandings about the research (Barnes et al., 2012)), the literature also recommends that more robust research needs to be conducted to further inform the currently lacking evidence base in this particular area (Beijers et al., 2016), which is important considering that the percentage of those who decline – regardless of reason(s) – is not accounted for in terms of accurately representing the population under investigation. Of course, this methodological ‘flaw’ is inherent in all research that studies human participants; however, enhanced efforts to diminish decline and enhance recruitment is not only important for statistical purposes, but also for strengthening the validity of conclusions with respect to implementation in ‘real-world’ scenarios. Thus, the aims of this qualitative study-within-a-trial (SWAT) is to explore individuals’ decisions to decline participation in a research programme trialling a therapy related to their chronic illness (see Study Context & Design) and to extend research on recruitment, which may, in turn, enhance the development and administration of future RCTs (Huang et al., 2018).

Methodology

Study context

The qualitative SWAT took place within the context of a RCT of a Cognitive, Occupation-Based programme for people with Multiple Sclerosis (Dwyer et al., 2020) – from here on referred to as the host trial, which is a single-blind, cluster-randomised controlled feasibility trial, using a two-arm (i.e. treatment and wait-list controls), pre-post study design and two additional follow-up testing times (i.e. 12 weeks and 6 months). Within the host trial, potential participants were recruited through advertisement in relevant newsletters (e.g. monthly MS Ireland newsletter); on websites offering information and services to people living with MS (e.g. MS Ireland); occupational therapists; posters and information leaflets posted in relevant clinics around the Republic of Ireland (e.g. neurology, general practitioner, primary care and physiotherapy); social media; and local media (e.g. radio and newspapers throughout the Republic of Ireland). Individuals who expressed interest in participating contacted the research team via email or telephone and were sent a participant information sheet and consent form. At this stage of the recruitment process, individuals decided to either participate (i.e. provide consent) or decline participation.

Notably, recruitment was halted after 4 months by arrival of the COVID-19 pandemic. Also noteworthy is that potential participants were provided one of two possible participant information sheets (see Online Supplemental Material), both of which included all information pertinent to study procedures, informed consent and mainly differed with respect to formatting and wording. This design manipulation was implemented consistent with the aims of another one of the host trial’s SWATs, which was to compare the effects of two patient information sheets (PISs): a patient-designed-and-informed PIS and a standard, researcher-designed PIS on: recruitment, decision certainty, retention; understanding, readability, accessibility, likeability and decision to consent (Dwyer et al., 2020). As a result, all individuals expressing interest in the host trial had a 50% chance of receiving the patient-developed PIS or the researcher-developed PIS.

Study design

A series of semi-structured, one-on-one telephone interviews were conducted to explore decliners’ reasons not to participate in the host trial, as well as their perception of the research. An inductive, interpretive qualitative approach was implemented in order to facilitate exploration and a deeper understanding of participants’ perspectives, the identification of clear and relevant themes (Willig and Rogers, 2017) and the gaining of insight into participants’ experiences of little understood topics (Silverman, 2013). Following preliminary analysis of the interview data (Phase 1), a focus group was conducted with the host trial’s Public & Patient Involvement (PPI) panel (i.e. people with lived experience of the particular condition as consultants throughout the research process (e.g. Crocker et al., 2018a, 2018b)), in order to review the findings and further elaborate on concepts and themes (Phase 2). As focus groups support interactive discussion, which capitalises on added depth of shared ideas (Carey, 2016; Parker and Tritter, 2006), the addition of the PPI focus group was implemented in order to add both depth and richness to the analysis and interpretation of findings; and also to provide a means of ensuring trustworthiness of the Phase 1 data. All data from Phases 1 and 2 were collected and analysed via reflexive thematic analysis (i.e. an iterative, recursive process, characterised by the ongoing formation and revision of themes following reading and re-reading of the data), which facilitates an inductive approach to identifying, analysing and reporting themes within qualitative data (Braun and Clarke, 2006).

Participants

Participants were recruited from the host trial’s list of individuals who expressed interest in participating, but ultimately declined to take part. Eligibility criteria for this SWAT were: (1) that individuals were eligible to take part in the host trial (see Author, 2020a for these criteria); and (2) these individuals explicitly declined to take part in the host trial (as opposed to ‘not responding’). Recruitment for decliner interviews ceased upon the arrival of the COVID-19 pandemic, given its potential contamination of qualitative data regarding reasons for declining to participate.

Materials

An Olympus Digital Voice Recorder WS-852 was used to record the telephone interviews and focus group. The semi-structured interview guide (see Table 1) was developed in light of the aim of exploring participant reasoning for declining to take part in the host trial and was further informed by: researcher observation during the recruitment process; expert review; and PPI input. Following development, the interview guide was pilot-tested with the research team’s PPI panel. Notably, in an effort to reduce bias, PPI members involved with the Phase 2 focus group were not included in the development or pilot-testing of the interview guide. Coding and analyses were supported by NVivo 11 (2015) software. The COREQ checklist (Tong et al., 2007) provided a framework for study development and guidance for reporting of results.

Table 1.

Semi-structured interview guide.^*

1. So, to start, where did you first hear about the COB-MS study? 2. Can you recall what initially piqued your interest in taking part in this research? 3. We are interested in learning more about the decision-making process regarding participation in our research study. We currently don’t know about how people go about making the decision regarding whether they want to take part in research, so that’s why we’re asking to get some insight into this from you; so, would you mind helping us understand how you came about making the decision to not participate in the COB-MS programme? a. . . .and what would you say were the main reasons for choosing not to participate? 4. Was this an easy decision for you? a. Did this decision take time to make? 5. Can you recall getting a chance to read through the information sheet? a. Was there anything in the information sheet that concerned you? b. Were there any particular elements of what was presented in the information sheet that did make you consider taking part? 6. What change or changes would need to have been made for you to participate? 7. Do you have any experience of taking part in research before? a. (Yes) Can you tell me a bit about it? 8. Can you tell me how you felt about the possibility of taking part in this research study before declining? 9. Based on the information provided to you, what did you think of the appropriateness and acceptability of the COB-MS programme with respect to your situation? 10. Did you have any concerns about your ability to participate in the programme? 11. Can you tell me how you feel about participating in research now?

^*The PPI panel was asked to comment, discuss and/or elaborate on the interview responses to these semi-structured questions.

Procedure

Participants were recruited through purposive sampling (i.e. individuals who declined to participate in the host trial) and provided informed consent to participate in an audio-recorded telephone interview. Upon ceasing recruitment for decliner interviews, 228 individuals had expressed interest in the host trial, of whom 110 were both eligible and consenting, with another 64 ineligible. As 37 of the 54 remaining individuals halted correspondence, the researchers were unable to make contact regarding an invitation to participate in an interview exploring reasons for ‘declining’, if applicable. Thus, the 17 individuals who communicated their ‘decline’ were contacted to participate in the interviews. Specifically, the 17 individuals eligible for the SWAT were telephoned by a member of the research team (either a research assistant or post-doctoral researcher) the asked to take part. Those agreeing to participate were sent an information sheet and consent form and returned their informed consent either by post or email. Following recruitment, a series of seven semi-structured interviews were conducted between January and May 2020 (mean duration = 10 m 55 s; ranging between 5 and 19 minutes) by a research assistant or post-doctoral researcher. Both researchers were involved with and knowledgeable of the host trial. Both were also experienced in qualitative research. The audio recordings were transcribed verbatim by two researchers and anonymised. The transcripts were then checked for both accuracy and missing data by both the interview facilitator and another member of the research team, prior to conducting the data analysis.

With respect to the focus group, three of five PPI panel members of the host trial were available to accept invitation to participate in an online focus group. Panel members were first presented and asked the same semi-structured interview questions as the decliners (without amendment and bearing in mind the perspective of interviewees, in light of having only engaged their allocated PIS) as a means of further exploring consistency between what the panel identified as potential reasons for decline and actual Phase 1 responses. The PPI panel was asked these questions prior to being advised of the decliners’ responses in order to limit any potential bias. Notably, PPI focus group members were not previously involved in the development of the PPI-developed PIS. Following discussion of the panel’s responses, PPI members were then presented the decliners’ various reasons for refusing participation; and asked to comment and elaborate, in light of both their perspectives regarding potential reasons for decline (as previously discussed) and their working understanding of the host trial. The resulting audio data from the focus group (duration 1 h 45 m) were again transcribed verbatim and checked for accuracy and missing data by the focus group facilitator (i.e. the post-doctoral researcher), prior to analysing focus group data.

Data analysis

Data were analysed by three members of the research team. Consistent with Braun and Clarke (2020), analysis was conducted by the researchers through: familiarisation with the data; coding and theme identification; and the reviewing and refining of themes. Specifically, familiarisation with the data began during data collection and involved the reading and re-reading of the interview transcripts, accompanied by observational note-taking. Researchers then systematically generated concise, meaningful codes, followed by identification of patterns from/within the data, both of which were discussed by the researchers. Themes were then identified in relation to one another, before completion of the iterative review and refinement of these themes against the transcripts, for the purpose of ensuring their credibility (Mays and Pope, 2000). As such, trustworthiness of the data and credibility of the findings were ensured through a variety of methods, including triangulation (e.g. multiple observers/observations and analysts/analyses), the immersion of researchers into the data for the purpose of ensuring rich descriptions and the consultation of the PPI panel. Notably, member-checking was deemed inappropriate for ensuring trustworthiness during the design of this study in an effort to avoid creating burden for the host trial’s ‘declining’ cohort.

Findings

Though a majority of the 17 ‘decliners’ shared reasons for declining (see Table 2 for reasons provided by the 17 decliners; NB: three individuals provided multiple reasons), only seven (N = 7; 4 f, 3 m) consented to participate in a telephone interview. PPI panel members included three individuals with MS familiar with the design and requirements of the study (2 f; 1 m). Pseudonyms were used for all participants in the SWAT.

Table 2.

Reasons for declining.

Broader reason	N	Specific reason (N)
Candidacy	3	Programme didn’t suit their personal preferences (1)
		Didn’t think: they were a good candidate/programme was a good fit for their particular circumstances (2).
Scheduling	4	Other personal obligations (3)
		Other treatment opportunity (1)
Worries/fears	5	Would prefer not to think about MS symptoms and worried the program would highlight these (1)
		Fear of a lack of understanding (1)
		Concerns over voice (1)
		Worries regarding transportation (1)
		Doesn’t want to do group sessions as they don’t want people to know about their MS yet (1)
Perceived mental well-being	2	Marriage separation – ‘not in a good mindspace’ (1)
		Program seemed too daunting (1)
Unrelated health problems	2	Recent surgery (1)
		Tumour treatment (1)
Unspecified personal reasons	1
No reason(s) provided.	2

Phase 1

Consistent with the aims of the SWAT, results from a series of seven semi-structured interviews with host trial ‘decliners’ revealed a number of reasons behind the decision to decline participation in the host trial (see Table 3), including mostly personal reasons – as opposed to perceived problems with the program within the host trial. With respect to this thematic analysis, four themes were identified, including: (1) Acknowledgement of the Value of Research; (2) ‘Fit’ of the Study; (3) Misinterpretation of Participant Information; and (4) ‘Ignorance is Bliss’.

Table 3.

Participant characteristics.

Pseudonym	PIS type	Primary reason	Secondary reason(s)
Anna	Patient-designed	Not a good ‘fit’	Time commitment
		Misinterpretation – thought it was about work/’occupation’ and social/environmental setting	Physical symptoms a barrier
Brian	Researcher-designed	Difficulty with communicating and answering questions.
Carmel	Researcher-designed	Misinterpretation – thought she had to travel out of region for intervention
David	Patient-designed	Not a good ‘fit’ – doesn’t think they have cognitive difficulties
		Misinterpretation – not a good ‘fit’ – perception of social focus
Edward	Patient-designed	Chose to participate in a different programme
Frank	Researcher-designed	Too daunting	Other illness at time of decision
		Too much time commitment	Negative research experience
Gabrielle	Patient-designed	Didn’t want to think about her symptoms

Theme 1: Acknowledgement of the Value of Research

The first theme explains that despite declining to participate, decliners still viewed research, their interest in it and its potential value in a positive light. Given that potential participants for the host trial were required to contact the research team with an expression of interest in order to be sent further information on the trial, it is not surprising that initial thoughts of all seven decliners were positive, though slightly different from one another with respect to the focus of interest. For example, whereas Anna, Frank and Edward were interested specifically in learning about the cognitive aspects of the programme, Brian, David and Gabrielle implied that they were interested because it could be of potential benefit – be it for themselves or others. Carmel was interested in the programme in order to learn more about MS from the standpoint of valuing MS-focused research. That is, though feeling it necessary to decline (as discussed below), a major focus of Carmel’s was the ‘value of research’:

‘Because there’s so much research and money going in to cancer, I felt there should be something going into MS. . . because it was just kind of. . . disappointing when there’s no research. . . coming out to link about it. . .Just the fact that that anybody was taking the time and trouble to do research and. . . you know, because it seems to be very low down on the list. . .’

Not only was the value of research acknowledged from an epistemological standpoint, but also from the perspective of being interested in getting actively involved, particularly for the purposes of benefitting others, as well as one’s self. For example,

‘I believe everyone should do research if they can, if not for yourself but for the health of others, because if you do enough research, you might get some good out of it.’ – David

Theme 2: ‘Fit’ of the study

Whereas Theme 1 focused on decliners’ accounts of why they would have liked to participate in research like the host trial, exposition on both the explicit and more ‘underlying’ reasons why a decision to decline was made begins in the second theme. Specifically, Theme 2 addresses, through three sub-themes (i.e. too much commitment; comorbidity and other symptoms; as well as candidacy), participants’ perceptions of the study’s relevance to them with respect to ‘fit’. With respect to ‘too much commitment’, some of the decliners indicated that the coupling of the study’s duration and time requirements. . .

‘I would be anxious about committing myself to, you know, so much. . . so much time.’ – Anna

. . .along with what Frank suggested as the potentially daunting nature of a programme like the host trial, the commitment involved and how it would potentially interfere with life. For example, as Frank put it:

‘The whole thing came to me like. . . I think you are working from a university background and it was very much designed as you would design something as you guys do for a university project; and all the I’s dotted and t’s crossed and you know, it pretty much came across as this ‘all-singing and all-dancing’; and I’m not ‘all-singing and all-dancing’ at the moment, myself. I just decided that. . . I just did not want to take part and I thought it would be interfering too much in my life.’

Though no refusal to participate by interviewees was based primarily on ‘comorbidity and other symptoms’ (i.e. the second sub-theme), it was a concern expressed as a secondary reason for declining to take part (see again, Table 3). For example, Anna states:

‘I have bowel and urine and bladder problems, so that would affect my ability to commit.’

Brian also emphasised particular symptoms or disease affecting his ability to participate:

‘Some, some of the questions were too difficult. . . I couldn’t really understand. . . My voice is bit off at times, now. . . I have a wee bit of difficulty in communicating. . . I have difficulty umm. . . thinking, ah, something in my head. . . I have difficulty getting out words.’

The final sub-theme of ‘fit of the study’ referred to decliners’ perceptions regarding their candidacy for the host trial, in light of the participant information sheet and advertisements made available to them. For example, according to Frank:

‘I wasn’t afraid of my ability as much. . . to be able to do really, I was afraid of my suitability sort of. . . I’m not sure if it was for me.’

In David’s case, following review of the participant information sheet, he recognised that the programme wasn’t a good ‘fit’ for him given that he reports not having cognitive difficulties – which is the primary focus of the host trial:

‘I didn’t know what it was, I don’t think I have that problem, in fairness. I didn’t. . . I didn’t know what it was. . . and it turned out. . . I didn’t think it would be of any use to me.’

Likewise, Anna also recognised not being a good candidate or ‘fit’ for the programme; however, Anna’s recognition, in this context, was based on a misinterpretation of the trial’s focus:

‘It’d be totally irrelevant to me, because I don’t operate in groups. . . I just realized that because I don’t operate in. . . public situations, with other people, it just wouldn’t suit me. It wouldn’t be of any use. . . I think your study. . . is not related to my particular situation. So, I can’t see myself, umm. . . fitting in with it; that’s all.’

Anna’s response is particularly notable for multiple reasons. First, of course, it exemplifies the importance of the notion of a study’s relevance and fit with a potential participant, but it also exemplifies both a simplification of decision-making and, to some extent, assuredness in this process, even though the decision is being made from a false – or, more accurately, misinterpreted premise. Such examples suggest not only the importance of potential participants ensuring that they understand the research they choose to participate/not participate in, but also the need for researchers to provide sufficient opportunities to clarify any misinterpretations such individuals may have. In light of this last point, Anna’s quote provides segue to the concept of misinterpretation, which was identified and analysed as the third theme.

Theme 3: Misinterpretation of participant information

Misinterpretation of participant information contained two sub-themes: ‘misinterpretation of the target demographic’ and ‘misinterpretation of study requirements’. As Anna’s previous response suggests, her misinterpretation was associated with the study’s target demographic. She further elaborated:

‘When I got the paperwork, there were three categories. . . three suggestions of various scenarios. I realized that I didn’t fit into either of them. . . It seems to me that there was. . . one particularly involved people who work and problems that you have. I don’t work. So, you know, I have total control over my environment and my socialization and everything else. So, this wouldn’t. . . wouldn’t seem relevant.’

Though the host trial does invite people who work to take part, the intervention is not restricted to this demographic and is just as relevant to those who do not work. Though there were indeed three scenarios provided as examples in the patient-designed PIS (see Online Supplemental Material), for how cognitive difficulties might impact on daily functioning, only one addressed ‘work’ (as well as one that addresses socialising, which perhaps account for the misinterpretation in Anna’s previous statement regarding ‘fit’ and ‘operating in groups’). It is also possible that the name of the trial could have facilitated this confusion – a ‘Cognitive Occupation-Based Programme for People with MS’; however, the use of ‘occupation’ in this context refers to discipline of occupational therapy – from which the programme is informed.

Consistent with Anna’s focus on ‘operating in groups’, David may have also misinterpreted the target demographic:

‘I didn’t think it’d be of any use to me, because I didn’t think I would have problems like that. . . and my job is basically meeting people all the time. That’s what I do – and I wouldn’t have any trouble going meeting people. . ..So I wouldn’t have anything like that. . . .I know there are some people who have trouble, let’s say mixing with others. . . whereas I wouldn’t.’

With respect to the sub-theme of misinterpretation of study requirements, Carmel addressed her inability to take part in the host trial as a result of (misinterpreting) the need for lengthy travel. For example:

‘If it’s to go up to [location]. . . I can’t. I live down in the ‘wild Atlantic way’ and the roads are bad and it’s hard to go up to [location]. . . I don’t have a car and, you see, it’s expensive travelling. If you did get a taxi. . . it’d be expensive anyway.’

Another example of the sub-theme of misinterpretation of study requirements is akin to ‘too much commitment’ under the second theme, ‘fit’ – according to Frank:

‘I read through it [the PIS]. . . now, I didn’t read through it three or four times, like, you know [but], I did go through the information sheet. . . I got the wrong impression, because I thought it was going to take more of a chunk over my life than umm. . . It seemed – it seemed too much of a commitment to me. Too many steps for me to say, ‘yeah’, and I figured, well, I’ve, I’ve wasted these people’s. . . enough of their time now, so better. . . better stop now, rather than go ahead and waste more resources on this.’

Notably, whereas the first half of Frank’s response reflects a misinterpretation of what might be required of him (i.e. level of commitment), what follows reflects a position of not wanting to waste resources in light of such misinterpretation, which is also consistent with valuing research, as in the first theme.

Theme 4: ‘Ignorance is Bliss’

The final theme was the concept of Ignorance is Bliss, which refers to the desire to abstain from research that could potentially draw too much of the individual’s attention to their own chronic illness, which they felt could have negative consequences. For example, Gabrielle identified this very theme as the core reason for her decline to participate:

‘I just thought, at the time, it sounded like something really interesting to do. Umm. . . but I thought more, then. . . I was just thinking, it’d make it even more obvious that’s what my symptoms are and I don’t want to know about it. . . being conscious of the symptoms that I have and remember. . . I prefer to try not to think about it; and if I go on with the study, I would be forced to think about it. . . and it’d annoy me a little bit if I had to think about it, which I normally put into the back of my head.’

Though David did not decline primarily as a result of this concept (rather, ‘fit’), he does address the notion of ‘ignorance is bliss’ and provides some interesting analogies for its mechanics:

‘I don’t believe in. . .. how can I put this? You give me medicines – I believe the biggest cause of side effects is knowing what the side effects are. I know there are things that can happen with MS that I don’t know about. . . But I believe if I know about them, the more the chance of it happening, if you know what I mean? It’s not that I’m scared to know things. I just don’t believe. . . If you looked at a medical encyclopedia, you will have the first three symptoms of about everything in it. . . A bit of ignorance can be a thing that is good as well. . . not to dwell on things and just get on with it, if you understand where I’m coming from? But then maybe, it’s just me hiding away from stuff. I don’t know. But I do believe that if you think something’s going to happen, as much as. . . like when you get a blood test or injection and they say, ‘it’s going to pinch a bit’, it almost hurts before you get it; whereas if they don’t say it, you don’t feel it.’

Phase 2

Following responses to the semi-structured interview guide and subsequent discussion of findings from Phase 1, overall, the results of the PPI panel’s focus group were largely consistent with the themes identified within Phase 1. For example, according to Amy, in relation to Phase 1 responses:

‘That sounds exactly valid, if I was in the other person’s shoes; so, it sounds reasonable. . . that all those concerns and kind of subconscious ways of kind of thinking yourself out of doing something or out of taking part; so, that’s very relatable.’

The PPI panel also expressed surprise about ‘getting’ as much data as researchers’ collected during Phase 1. For example, Cindy noted that:

‘I thought it would be pretty hard to kind of pin people down. I mean, because we can all understand. . . it’s very easy to say why you want to do lots of things, but why you don’t want to do lots of things. . . you don’t feel comfortable, kind of going, ‘Sorry, but I don’t want to do this because. . .’’.

With respect to the theme of ‘value of research’, the PPI panel likewise acknowledged the potential benefits of taking part in research, be it for themselves or others. Consistent with Carmel’s perspective in Phase 1, they also noted how some research programmes, such the host trial, have the added value of potentially ‘filling in gaps’ with respect to a lack of services. For example, according to Cindy:

‘Now, [my cousin who also has MS] she’s based in Scotland; so, we were able to compare and contrast our treatments. . . she was actually amazed by the lack of. . . treatment[s] available here [in Ireland]. . . there’s no hiding the fact that there is a big gap in our in resources over here for things. . . definitely, I think cognitive issues come under that.’

Furthermore, the PPI panel also indicated that one’s valuing of research may result from their background or knowledge of science. For example:

‘I suppose I would like to think that I’d be very pro – the whole idea of research and advancement of study. I mean, my background is electronic engineering; like, I’d be fairly outward looking, really.’ – Bill

Notably, the PPI panel also identified the concept of knowledge background as an important aspect of ‘misinterpretation of participant information’ (i.e. Theme 3 from Phase 1); for example:

‘I think to understand. . . some [participant information sheets] are kind of overly com-plicated. . . that I’ve seen before and others then are fantastic that they’re just literally straight to the point, nothing like over-talked, it was just straightforward. So yeah, there can be that difference. . . like it means something to someone who. . . maybe has a science background or whatever, but to a complete lay person – they mightn’t know.’ – Amy

The PPI panel also shed further light on the theme of ‘ignorance is bliss’ through their discussion of various stages of acceptance in living with MS, in which case ‘ignorance is bliss’ was equated with ‘denial’ as a sort of coping mechanism. For example:

‘It is denial. It is absolutely denial – yeah, because I think I’ve lived so long with denial, like I kept my MS a secret for so many years, from so many people; and then finally went to counselling for it and worked through that denial and told everyone about it. So like it’s definitely. . . the denial thing is a coping mechanism to just shut – kind of, give yourself tunnel vision to basically just keep going. . . If you can’t see it, it’s not going to bother you kind of thing.’ – Amy

In this context, acceptance of MS was also described by the PPI panel as occurring on both an emotional and an intellectual level, in which the relationship between these ‘levels’ may play an important role their decision to decline. For example, though potential participants may have been prepared to engage in the research process on an intellectual level (e.g. finding out more information about their illness), they may subsequently decline as a result of the perceived emotional stress associated with discussing their MS in social settings. According to Amy:

‘There is a kind of a paradox; like, you can deal with it on an intellectual level, but you can’t deal with it at some, like, emotional level. . . so it’s kind of like you want to know all you can, from say, like the research side of, like you know, all the current treatments, how effective they are; and then, because you can’t kind of accept where you are at the moment; and emotionally, you don’t want to talk about it; but you’re doing all this research you’re not talking about.’

The panel also indicated that the ‘ignorance is bliss’ theme may somewhat, similarly, involve a reluctance to place oneself in situations where they might compare themselves with others who have the same illness, such as the group sessions involved in the host trial’s intervention; wherein decliners may have felt forced to confront their own symptoms. For example, according to Cindy:

‘The one thing that I really dreaded about the neurology clinic was you actually have to sit in a room with people who are mostly in the same boat as you, and there’s an element of, you know, I don’t want to compare myself to anybody else. I don’t want to know if. . . [I’m] doing better or worse. . . because either way, like there’s no winners there, you know. . . we know that it could be worse. . . there’s always someone out there. . . worse than yourself; but, at the same time it’s a bit of a sort of Pandora’s box, you know? If I start to explore this, what are the results at the other end? Am I going to be – how. . . am I going to feel about this at the end of the day?’

Concerns regarding this social-emotional aspect of ‘ignorance is bliss’ also applies to the theme of ‘fit of the study’, in that anxiety over participating in groups may stem from a lack of confidence in social situations, as a result of their MS; thus, being a poor fit for these individuals and, subsequently, influencing their decision to not partake in the research. Notably, this could be of particular significance to Anna’s decision not to participate as a result of her not ‘operating in groups’ (see Phase 1). For example, according to Amy:

‘. . .MS affects your social life a fair bit – you’re not as active or as outgoing as you used to be. But, you know, that could lead to a bit of kind of anxiety about being in big groups of people. . . and that’s one of the kind of side effects of MS. . . that you definitely spend more time on your own than you used to and that could probably kind of make groups not fit right or feel right.’

Specific unto ‘fit of the study’, the panel indicated that the potential for ‘fit’ could be split into two main categories, including contextual reasons for declining regarding general practicalities around participating (such as the sub-themes from Phase 1 interviews: too much commitment; candidacy; and comorbidity and other symptoms):

‘I can’t guarantee. . . like, say tomorrow, that I’ll be in good form and be able to do something. You know, it’s very much ‘take one day at a time’ and, like, that really doesn’t gel with like taking on something as a thing that you want to kind of keep up. . . It’s very unpredictable. . . how you’re going to feel; and that affects your day and then that affects your ability to do things.’ – Amy

. . .as well as reasons for declining as a means of self-preservation and avoiding feelings of being overwhelmed. With respect to this second ‘category’, Cindy described the importance of being mindful of not overworking oneself for fear of her health deteriorating:

‘You have to kind of think about yourself first a lot of the time, in some respects, because you have to be like, well, you know, ‘I’m no good to anyone if I get worse, so I have to look after myself.’

She also highlighted the importance of knowing one’s threshold for taking on too much:

‘You have to kind of build up the skill set for yourself to learn how to manage and know when your cut-off point is and. . . at the same time, it’s very hard to incorporate something new, like by getting involved in a study like this’

. . .and an awareness of not over-burdening herself to the point of being overwhelmed:

‘It’s any slight little increase and, we’ll say, the general burden just becomes too much and overwhelming; and then you just don’t want to take part.’

Discussion

Interpretation of results

Results from the SWAT revealed a number of reasons behind the decision to decline participation in the host trial, most of which were of a personal nature, rather than perceived problems with the host trial’s intervention (e.g. concerns regarding candidacy, scheduling, mental-well-being, unrelated health problems, as well as other worries and fears). Furthermore, four themes were identified which, cumulatively, suggested that though decliners see the value of research aimed at their particular chronic illness, there remained the potential for declining as a result of either misconstruing the details of the study or perceiving participation as not being a good fit for them. For example, some may already feel at capacity with respect to how they cope with their MS. Thus, not participating may be their way of prioritising their own health (e.g. ‘ignorance is bliss’).

These results are consistent with research by Barnes et al. (2012), who also found that perceptions of candidacy/ineligibility, as well as misinterpretation of study-related information were important reasons for why potential participants often decline. The latter issue is also akin to research findings by Moynihan et al. (2012), regarding confusion about/misinterpretation of trial processes. Likewise, acknowledging the value of research is also consistent with past research (e.g. Canvin and Jacoby, 2006), given that it is a common feature for initially expressing interest in participation. Findings are further consistent with recent research by Mundy et al. (2020), who also found ‘fit’ and ‘time commitment’ (i.e. ‘It’s not for us’) as important (sub)themes regarding participation decline. However, the notion of ‘fit’ and ‘ignorance is bliss’, from the perspective of coping and psychological well-being, appear be to novel – though not entirely surprising – findings that were identified, developed and refined through analysis and discussion as major themes during both Phase 1 and 2 of the SWAT. As indicated, though potential participants may often decline because of misinterpretation or more practical reasons (e.g. scheduling; time commitment; perceptions of candidacy/eligibility; and/or interference from symptoms or comorbid illnesses), they may also decline for more subtle, psychologically-based reasons consistent with their preferred strategies of coping with their illness – be it adaptive (e.g. to avoid overwhelm) or maladaptive (e.g. denial).

Nevertheless, the decision-making process may not always be as automatic or as easy as some participants in this SWAT suggest it to be. According to research by Hughes-Morley et al. (2016), the decision to decline might resemble a four-stage process that is somewhat consistent with many of the themes and sub-themes identified in this SWAT. For example, individuals interested in the research first assess potential participation in the context of their experiences and attitudes. If they remain positive, they then assess their eligibility (e.g. candidacy); thereafter, they assess their level of need for the intervention and its potential benefit (see also Cohen-Mansfield, 2003); and then, finally, they conduct a cost-benefit analysis of participation (e.g. will the potential benefits outweigh the time and effort required to participate). From this perspective, though the decision to decline may not be as automatic or as easy as suggested in this SWAT, it also implies that there are a variety of opportunities to decide to decline before coming to the decision to consent.

Limitations

Though the results of this qualitative SWAT yielded a number of interesting findings, there are multiple limitations that must be considered. For example, Phase 1 interviews were relatively short with respect to what was anticipated by the research team and, similarly, it could be argued that the depth of the data’s qualitative ‘richness’ was lacking – which was addressed by the PPI panel. Though it was anticipated that interviews would be approximately 15–20 minutes each in length, in retrospect, it seems reasonable to suggest that the brevity of the interviews resulted from participants having said all they had to say on the topic. This recommendation is made given: the nature of participants not actually having taken part in the host trial and only being able to report on why they declined (in light of the PIS); and not as a result of the scope of the interview guide (again, see Table 1) or the experience of the researchers. Moreover, despite anticipating longer interviews, the research team was also aware of this potentiality; hence designing the study to incorporate the PPI panel’s focus group, which was conducted in order to elaborate, further explain and interpret Phase 1 responses. Thus, while the length and lack of depth of Phase 1 interviews can be considered a potential limitation of the SWAT, the duration of the shortest interview is consistent with similar, recent research by Mundy et al. (2020) and the addition of a PPI panel focus group succeeded in adding strength to the SWAT by reinforcing efforts to interpret the data.

Another potential limitation that must be considered was the, arguably, small sample size of participants interviewed within Phase 1. As addressed in the Methodology, recruitment ceased after 4 months in light of the COVID-19 pandemic, given its potential for contamination of data regarding reasons for declining to participate. Moreover, though a sample size of seven is by no means insufficient for this type of research, coupling this figure with short interviews and a potential lack of depth with respect to ‘richness’, caution with respect to interpretation is advised. Again, however, given the input of the PPI panel’s 1hr45min focus group, which yielded deep, rich qualitative data, significantly elaborated upon Phase 1 findings and facilitated thorough interpretation of Phase 1 data, it can also be argued that such limitations were accounted for and overcome.

Conclusion

The results of this SWAT are informative with respect to identifying targets of focus in future research aiming to enhance recruitment to RCTs. For example, future research should aim to: (1) design and develop methods of sharing ‘participant information’ that reinforce the value of research, ensuring to make explicit the benefits of the research both to the individual and to others; (2) acknowledge that misinterpretation is likely and so, to avoid this, make greater efforts to ensure clarity and accessibility of information provided to potential participants; and (3) acknowledge that some individuals will not outweigh participation in favour of their own coping strategies – be it avoidance of overwhelm or isolation from large groups. Likewise, the findings also suggest that PPI can be utilised in both a practical and impactful manner, such as in the SWAT, wherein a PPI panel worked with researchers in a focus group to help elaborate on and interpret qualitative data.

Research Data

sj-docx-1-hpq-10.1177_13591053211037736 – for A qualitative investigation of reasoning behind decisions to decline participation in a research intervention: A study-within-a-trial

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sj-docx-1-hpq-10.1177_13591053211037736 for A qualitative investigation of reasoning behind decisions to decline participation in a research intervention: A study-within-a-trial by Christopher P Dwyer, Anusha Moses, Fionnuala M Rogers, Dympna Casey, Robert Joyce and Sinéad M Hynes in Journal of Health Psychology