Translating qualitative data into intervention content using the Theoretical Domains Framework and stakeholder co-design: a worked example from a study of cervical screening attendance in older women

Background Previous screening interventions have demonstrated a series of features related to social determinants which have increased uptake in targeted populations, including the assessment of health beliefs and barriers to screening attendance as part of intervention development. Many studies cite the use of theory to identify methods of behaviour change, but fail to describe in detail how theoretical constructs are transformed into intervention content. The aim of this study was to use data from a qualitative exploration of cervical screening in women over 50 in the UK as the basis of intervention co-design with stakeholders using behavioural change frameworks. We describe the identification of behavioural mechanisms from qualitative data, and how these were used to develop content for a service-user leaflet and a video animation for practitioner training. The interventions aimed to encourage sustained commitment to cervical screening among women over 50, and to increase sensitivity to age-related problems in screening among primary care practitioners. Methods Secondary coding of a qualitative data set to extract barriers and facilitators of cervical screening attendance. Barrier and facilitator statements were categorised using the Theoretical Domains Framework (TDF) to identify relevant behaviour change techniques (BCTs). Key TDF domains and associated BCTs were presented in stakeholder focus groups to guide the design of intervention content and mode of delivery. Results Behavioural determinants relating to attendance clustered under three domains: beliefs about consequences, emotion and social influences, which mapped to three BCTs respectively: (1) persuasive communication/information provision; (2) stress management; (3) role modelling and encouragement. Service-user stakeholders translated these into three pragmatic intervention components: (i) addressing unanswered questions, (ii) problem-solving practitioner challenges and (iii) peer group communication. Based on (ii), practitioner stakeholders developed a call to action in three areas – clinical networking, history-taking, and flexibility in screening processes. APEASE informed modes of delivery (a service-user leaflet and a cartoon animation for practitioners). Conclusion The application of the TDF to qualitative data can provide an auditable protocol for the translation of qualitative data into intervention content. Supplementary Information The online version contains supplementary material available at 10.1186/s12913-022-07926-2.


Background
Cancer of the cervix is one of the most preventable forms of the disease: pre-cancerous cells can be identified using a screening test and treated before they develop into cancer. Public cervical screening programmes are provided in many countries, but do not generally reach target participation rates [1]. Reviews of interventions to encourage screening uptake demonstrate that cervical screening programmes face different challenges to breast and colorectal screening [2,3]. Cancer screening is targeted by age and gender: in England, women aged 50 to 70 are invited for breast screening, men and women aged 60 to 74 for colorectal cancer screening and women aged 25 to 64 for cervical screening. Cervical screening is stratified further, transitioning from 3-yearly to 5-yearly screening from the age of 50. Cervical screening also differs from breast and colorectal screening in other ways. Screening the cervix is an invasive procedure, requiring a sample from inside an intimate area of the body. Having this procedure carried out by a GP or practice nurse can cause embarrassment or distress [4,5]. Health beliefs surrounding cervical cancer can also affect attendance -for example, stigma and perceptions of risk arising from the association of cervical cancer with promiscuity [6][7][8]. Research into barriers that keep women from attending for screening suggests that a multiplicity of demographic and cultural factors also contribute to decision-making [9,10], in addition to health knowledge and structural issues such as the costs associated with taking time off work or travelling to appointments [5,11].
In 2019-20, a preliminary test was introduced for human papillomavirus (HPV), a common, symptomless infection which can be contracted from a single sexual contact and is the main causal factor in the development of cervical cancer. Prior to this test becoming standard in the UK, all screening samples were subject to cytology (examining cells from the cervix for pre-cancerous changes); under current protocols, only those which are positive for a high-risk strain of HPV are now taken forward. Vaccination to protect against HPV was introduced for girls aged 12-13 in the UK in 2008, with the eldest girls to benefit now aged 30-31. The vaccine is not routinely given to older women as it offers less protection and is less cost-effective [12], leaving them at greater risk. Home testing for HPV is currently being trialled in the UK [13]; if this approach is successful, women over 50 will need encouragement to engage with home testing. Where a HPV test is positive, they will subsequently need to attend their GP surgery for a cervical screening test.
Among the demographic factors, age is now playing a key role in the challenges facing cervical screening programmes. In the UK, a quarter of women aged 50 to 64 do not attend free screening offered by the National Health Service, and rates for attendance drop further at the top of this age range [14][15][16][17]. Evidence suggests that women over 45 are more likely to make the decision to stop attending than younger women [5,8], to cite past traumatic experiences as a reason for non-attendance [4,18,19], and to experience the screening procedure as more painful [20]. Current evidence predicts a potential rise of more than 60% in rates of cervical cancer among older women by 2036 [21], suggesting an urgent need for targeted interventions to engage women in this cohort with home testing and cervical screening.
The impact of initiatives to encourage screening uptake is often low, localised or short term [7,[22][23][24]. In the European literature, interventions are largely taskfocused, based on raising awareness by altering the content or source of information provision [2,3]. Evidence from Africa and America suggests that consciousnessraising alone, while increasing women's knowledge and awareness of the benefits of screening, does not necessarily translate into action [7,[24][25][26]. Engagement with screening requires behavioural change, and behavioural change is shaped by social and environmental context. Successful interventions beyond Europe have often developed around community education initiatives, and demonstrate how stakeholder involvement in intervention development can tailor interventions to fit local social and cultural contexts [27][28][29].
In the UK, Medical Research Council (MRC) guidelines for complex interventions [30] and National Institute for Health and Care Excellence guidelines [31,32] emphasise the need to ground behaviour change within a theoretical framework. The explicit use of theory also allows us to understand the mechanisms of influence of such interventions and to replicate these [33]. Systematic review evidence demonstrates the effectiveness of the application of theory in this way [34][35][36]. Studies which have used behavioural theories to develop their interventions have shown more success in increasing screening rates [37,38]. Crucially, these interventions take social determinants into account [3,39] -those that influence women's attitudes and health beliefs, including, for example, factors shaping women's past experiences of screening and perceptions of risk. Many studies cite the use of theory to identify methods of behaviour change, but fail to describe in detail how theoretical constructs are transformed into intervention content [40][41][42][43]. Transparency about this process will broaden the toolbox for future intervention development, and enable more effective evaluation [33]. In this paper, our aim is to describe how barriers and facilitators to attending cervical screening, identified in qualitative data from a primary research study grounded in a constructionist epistemology [44], were categorised into theoretical constructs and used to identify appropriate behaviour change techniques. We then describe the stakeholder co-design of the content and mode of delivery of two pragmatic interventions: a service-user leaflet and a video animation for practitioners, for use in primary care (doctors' surgeries and associated health networks) in the UK.

Study design and setting
The raw material for intervention development took the form of a data set from a qualitative study [44] conducted immediately prior to stakeholder co-design workshops. We selected the Theoretical Domains Framework [45] as the theoretical basis for our study as it synthesises all published models of behaviour and behaviour change, offering us a comprehensive means of understanding environmental, social, cultural, institutional and individual practice behaviour determinants. The framework uses language accessible to non-psychologists, giving it utility in the stakeholder co-design process, and once determinants are categorised to the framework it offers a pragmatic means of selecting the behaviour change techniques that are most likely to be effective [46]. The TDF has been tried and tested in other areas of health care [47][48][49] to inform interventions for both practitioner [50] and service-user [51] behaviour change.
Strategy for the analysis was formulated by the project steering team (all authors). BCT theory was applied by conducting secondary coding of the qualitative data set to draw out quotations describing barriers and facilitators of attendance; similar quotations were pooled to create a set of representative barrier and facilitator statements in a collaborative session involving three members of the research team (AB 1 , JD, HC). AB 1 , HC and JD are female researchers with PhD-level research methods training, each with applied health research experience spanning 10 years or more; JD is an implementation science specialist.
Barrier and facilitator statements were then categorised using the TDF to identify key domains [45], and the behavioural change techniques associated with these domains [46]. The barrier and facilitator data were presented to stakeholders by AB 1 , HC and JD in one lay focus group (FG1) and by AB 1 and HC in two practitioner focus groups (FG2, FG3) convened in 2017 and 2018 in the two urban districts involved in the primary interview study. Focus groups were audio recorded, transcribed verbatim and anonymised; recordings were placed in secure data storage at the University of Hull. The focus groups formulated target behaviours for two interventions (one for service-users, one for practitioners), and designed intervention content based on the behavioural change techniques associated with key domains identified using the TDF. Interventions were then developed by the research team based on the focus group discussions, intended for implementation via primary care networks (general practitioner surgeries) in the UK.

Sampling and recruitment of stakeholders for intervention development
FG1, which took place at the University of Hull, was convened by the research team from service-users interviewed as part of the qualitative study [44]. Participants from the previous study were asked at the end of their interviews whether they wished to take part in the codesign of an intervention; the majority declined and were not asked to give a reason for declining. Five serviceuser interviewees between the ages of 55 and 64 volunteered to assist (two had stopped attending for screening, two delayed attendance for complex reasons, and one attended regularly). The practitioner focus groups (FG2 and FG3) took place at primary care premises in two towns in the north of England serving areas with a high degree of deprivation. Both groups were recruited by three practitioners interviewed for the qualitative study, and included 11 further screening practitioners from their local primary care networks. FG2 involved four GPs and four practice nurses; FG3 included one GP and five practice nurses. All participants for focus groups were female.

Intervention development procedure
The target behaviour specified was attendance for cervical screening in women over 50. Intervention development subsequently involved three stages: the recoding of qualitative data to produce a set of barrier and facilitator statements, the categorisation of barrier and facilitator statements into domains following the TDF, and service-user and practitioner focus groups to facilitate the stakeholder co-design of intervention content from both perspectives. See Fig. 1 for a flow diagram of procedures.

Stage 1 -secondary coding of qualitative data set
The data set from the primary qualitative study focused on experiences of cervical screening in women over 50, and practitioner experiences of conducting cervical screening with women over 50. The thematic coding template developed in the original qualitative study was used as a guide to draw out statements representing barriers and facilitators of attendance (AB 1 ). Themes exploring women's difficult previous screening experiences, myths and misunderstandings surrounding screening, and the challenges faced by practitioners contributed data representing barriers. Themes exploring family health talk, sexual health and relationships, and history-taking and rapport-building during appointments contributed data representing facilitators. Less prevalent barriers and facilitators were noted where they appeared elsewhere in the data -for example, knowledge deficits and environmental influences (such as perceived difficulties with screening equipment, where women associated the procedure with a metal speculum and scraper used in earlier decades rather than the present-day plastic speculum and brush). Multiple quotations from the qualitative data represented similar concepts. The statements were read by three research team members (AB 1 , JD, HC), and in a full day collaborative analysis session, the team pooled similar quotations into two sets of summary statements representing barriers and facilitators in preparation for stage 2 (see Table 1 for examples).

Stage 2 -categorisation of barriers and facilitators into theoretical domains
For this project we chose to use the consensus matrix proposed by Michie et al. [46] for its clarity and utility. This provided a clear protocol for linking TDF domains with behavioural change techniques. This work has been developed further by Michie et al. [52] and Carey et al. [53], and intervention developers can now take advantage of an online Theory & Techniques Tool [54]. Summary statements representing barriers and facilitators were categorised under the following constructs from the TDF: knowledge, skills, role and identity, beliefs about capabilities, beliefs about consequences, motivation and goals, memory/attention/decision processes, environmental context and resources, social influences, emotions and action planning. Matching data with domains was a subjective process involving discussion and negotiation among the team until consensus was reached.

Stage 3: stakeholder focus groups
Focus group 1 involved service-users, focus groups 2 and 3 involved practitioners; each focus group lasted 1.5 hours.
Service-user focus group In focus group 1, patient stakeholders were introduced to the concept of identifying the target behaviour (cervical screening attendance in women over 50). The research team presented barriers and facilitators data and explained the process of linking these with the domains of the TDF. Behavioural change techniques for addressing the key identified TDF domains were then introduced by the team's behaviour change specialist (JD) (see Table 2). Photographs from popular advertising focusing on lifestyle and health were used to assist an explanation of the principles of behaviour change, and to provoke thought about the focus of an intervention (for example, images of people over 50 engaging in 'healthy' activities, and of interactions between health care professionals and patients). Stakeholders were encouraged to discuss their ideas for intervention content based on the relationship between the target demographic to which they belonged (women over 50) and the qualitative data statements. Potential modes of delivery were brainstormed with APEASE criteria in mind: affordability, practicability, effectiveness, acceptability, safety and equity [55].
Practitioner focus groups In focus groups 2 and 3, the same barriers and facilitators of attendance were presented in categories, shaped by the service-user focus group discussion of practitioner challenges ('patient' barriers, practice barriers, and facilitators of good practice). Stakeholders were asked to identify key challenges in the practice of cervical screening with women over 50 in relation to the barriers to attendance, and to match facilitators to the challenges in a way that characterised 'good practice' , evidencing sensitivity to age-related issues connected with cervical screening. Key elements of these discussions are summarised in Table 3.
Transcripts of the focus groups were summarised to guide the written intervention content, which was structured to fit the mode of delivery recommended by stakeholders. The translation of qualitative data into intervention content is described in detail below.

Results
The majority of the barrier/facilitator data clustered beneath three TDF concepts: beliefs about consequences, social influences and emotion, and smaller clusters of data corresponded with beliefs about capabilities and deficits in knowledge. Examples of data mapped on to the domains are given in Table 3. The mapping framework from Appendix B of Michie et al. [46] was used to match the three most prevalent TDF concepts with appropriate behaviour change techniques: persuasive communication and the provision of information regarding behaviour/ outcome to address beliefs about consequences, stress management to address difficult emotions, and role modelling and encouragement to harness social influences (see Table 2).

Service-user stakeholder group
Stakeholders were introduced to behaviour change techniques related to the processes described above, and how these might be harnessed in the development of intervention content ( Table 2). The target behaviour was attendance for cervical screening.

Development of intervention content
There was a strong consensus that the provision of information for women over 50 should focus on questions about screening protocols or uncertainties about continuing screening, and that as 'patients' , women do not Stakeholders stated that the questions included needed to be uniquely pertinent to the experience of aging and menopause. On reconsidering suggested modes of delivery after this discussion, a printed leaflet asking and answering age-related questions about screening was suggested as the most practical way of addressing these concerns, with content guided by experiences of intimate examinations and misunderstandings about screening among women over 50 drawn from the barriers and facilitators data.
In considering how the visual elements of the question-and-answer section would work, stakeholders emphasised that rapport between women and screening practitioners was central among the facilitator statements. Among the visual material provided to provoke discussion, stakeholders chose a photograph of a nurse and patient to represent the importance of personal communication and the building of rapport: 'there's like some sort of relationship, their heads are right close together' (Stakeholder 2). The consensus was reached that questions and answers could be presented as a conversation between a practice nurse and a 'patient' , and that this should be introduced by a service-user story created from the interview data in which a woman over 50 is described talking with friends about cervical screening, to role model attendance behaviour. See Fig. 2 for the service-user story and examples of question-and-answer text.
Stakeholders perceived stress management as part of the practitioner's role, citing barriers to attendance which described difficulties in communication with service providers, and emphasised the need for confidence and reassurance: 'I don't do doctors any more, just forget it, you know, it causes aggravation... I'll just stay at home, I'll just Google, it'll be fine!' (Stakeholder 1). Discussion of strategies for stress management led to the identification of the target behaviour for a practitioner intervention: the demonstration of increased sensitivity to age-related issues during the screening process (which included appointment making and pre-screening conversations as well as the test itself ), as a way of managing the stress that can be experienced by women over 50 in relation to cervical screening.

Mode of delivery
Service-user stakeholders considered the range of contexts in which information about cervical screening in women over 50 could be effectively disseminated. Ideas included printed messages on supermarket till receipts, leaflets, open days at doctor's surgeries, and the use of role models via media campaigns. Focusing on the APEASE criteria [55], in particular on practicability, it was felt that women's need for privacy could be reflected in a concertina-style leaflet, folded up to hide the content, to fit inside a purse or pocket. Distribution was to occur via primary care or via suitable community venues.

Practitioner stakeholder groups
In preparation for the practitioner focus groups, barrier statements were categorised under Challenges to attendance and divided into the subcategories 'Patient' barriers and Practice barriers. To guide the discussions, data statements were summarised into four key challenges related to reducing the stress that can be associated with cervical screening for women over 50 (see Table 3): two challenges emerged at the organisational level (1 and 2) and two at the individual practitioner level (3 and 4). Facilitator statements offered examples of potential good practice in each area.

Development of intervention content
The four challenges were discussed in relation to the local demographic contexts of individual GP practices, and developed in more detail to inform the intervention content. Appropriate communication (challenge 1) was linked by practitioners with proactive contact with non-attenders, introducing cervical screening opportunistically during other health consultations, and allowing responsibility for the decision to rest with the patient. Flexibility (challenge 2) included allowing for pre-screening appointments to explore difficulties, and maintaining individual nurse-patient relationships across multiple screening appointments where possible. The development of rapport (challenge 3) was connected with taking time to explore women's past experiences: That, that is the key and the crux to being able to get a successful smear and for that lady to come back and have that confidence in you, is, is the history taking, I think that's the most important thing. (Stakeholder 1, FG3, Practice Nurse) Suggestions for tailoring the screening process to women over 50 (challenge 4) included increasing practitioners' knowledge of alternative positioning to accommodate mobility issues, and offering preparative appointments prior to screening to allow the prescription of oestrogen cream to resolve dryness or medication to counteract anxiety, if appropriate.

Mode of delivery
An initial proposal of a laminated A4 sheet detailing the good practice points was rejected by practitioners as unsustainable as it was likely to be overlooked or become lost. Training for cervical screening was seen as onerous by both practitioner groups, and they requested an intervention that was focused and short. The consensus was that the best form of delivery would be a short audio-visual that could be watched on a mobile phone in work breaks, or on a tablet or computer, that could also be embedded in the current mandatory on-line training course for cervical screening practitioners in the UK and rewarded by credit contributing to continuing professional development (CPD).

Content development
The leaflet content comprised of a series of 'patient' questions and practitioner answers based on issues arising from the interview data to address the challenges in cervical screening for women over 50, and to overcome myths and misunderstandings about the screening process in evidence among the target population. Figure 2 shows examples of questions developed during the patient stakeholder focus group. Answers to the questions were drawn from facilitator data and examples of good practice discussed in practitioner focus groups.

Mode of delivery
A 300 mm × 235 mm leaflet was produced, targeted at women over 50. The leaflet folded up into a credit card size between two card covers (84 × 54 mm).

Practitioner intervention Content development
An 11-minute audio script was developed by AB 1 in consultation with the research team. Table 4 illustrates key issues arising in the focus group discussions that were included in the script. Based on discussions in the stakeholder focus groups, a decision was made to focus the animation around a conversation between two female friends over 50 (one a screening attender, the other a non-attender), using quotations from the interview data to construct a dialogue which systematically illustrated barriers to and facilitators of attendance. The storyline moved through the women's lifecourse, from their twenties to their sixties, to mirror the 'history-taking' described by Stakeholder 1 in FG3, above. The narrative explored the experiences and challenges specific to cervical screening and the facilitators of good practice, as discussed in FG2 and FG3. A women's health expert known nationally to practice nurses and GPs in the UK narrated an introduction to the conversation, and drew out key points for a call to action at the end of the animation. (See Additional file 1: Animation Script).

Mode of delivery
An 11-minute educational whiteboard animation for download on a mobile phone and dissemination on remote training platforms.
We are now looking to embed these interventions in the UK primary care setting via general practitioner surgeries and (for the practitioner intervention) online Table 2 Developing the content of the patient intervention using theoretical constructs from Michie et al. [46] Behavioural change technique associated with key TDF domains

Application of theory to intervention content
Persuasive communication.
Warm and empathetic tone.
Information regarding behaviour/outcome. Question and answer format, correcting myths and misunderstandings about screening/its outcomes: • distinguish myths from facts; • address age-related questions about the screening process.
Stress management. Illustrate importance of rapport with practitioner/sensitivity of practitioner to experiences of women over 50.
Modelling/demonstration of behaviour by others. Social processes of encouragement, pressure, support.
Use social influences meaningful to women over 50/role modelling of discussing and attending screening by people they can relate to.  Examples from data: • Lack of networking between practice nurses who carry out cervical screening.
• Difficulties in making older women comfortable when they have menopausal or mobility issues; lack of continuity with patients in addressing difficulties.
• Difficulties with equipment (table height not  training for GPs and practice nurses as a supplement to training currently in place for cervical screening.

Discussion
There is evidence that the use of behavioural change theory can increase the success of interventions [56,57]. This approach has been used to develop a limited number of cancer screening programmes to increase the chances that knowledge will translate into action [3]. In this study, our intentions in using a theoretical approach were twofold: (1) to explore the determinants that mediate between thinking about attending for cervical screening beyond the age of 50, and acting on those thoughts, and (2) to use our findings to shape focused intervention content through stakeholder engagement. This discussion will explore the potential benefits and drawbacks of these processes. The analytic framework of our primary study provided a guide to recoding our data into barrier and facilitator statements. Our interview study demonstrated that the determinants of screening attendance are not only shaped by the psychological and physical changes women experience as they age, but by relational aspects of the screening encounter -specifically, women's interactions with GP practice staff, individual screening practitioners, peers and sexual partners. Themes describing emotional difficulties and misunderstandings about cervical cancer guided us towards barrier statements related to the existing cervical screening literature, themes describing practitioner challenges in the screening encounter provided additional barrier statements, and themes exploring women's sexual histories and mother/daughter and patient/practitioner relationship-building provided the majority of facilitator statements.
In the original qualitative study, participants were not asked to interpret their experience through the lens of theoretical domains during the interview. Cervical screening was a sensitive subject, and interviews focused on eliciting interviewees' experiences of intimate screening, to avoid leading the agenda surrounding attendance. We would argue that structuring interview schedules around the domains of the TDF [58] runs the risk of placing the agenda too firmly with the theoretical framework at the expense of exploring the main characteristics of the experience under question.
For our study, the free coding from the original qualitative study analysis aggregated data on barriers and facilitators as they emerged from stakeholders' descriptions of experience. Given that barrier and facilitator statements are quantified when they are assigned to the TDF, the selection of salient domains to pursue with behaviour change techniques was driven by the elements of screening that interviewees chose to talk about in relation to our research question ('How does aging affect women's experiences of decision-making about attendance for cervical screening?'). This hybrid approach [59], with deductive theoretical coding informed by an initial inductive analysis, allowed the stakeholder perspective to remain central and drive the distribution of barrier and facilitator statements in a way which remained true to participants' experiences.
Matching barrier and facilitator statements to the theoretical domains of the TDF was a subjective process involving collaboration and negotiation between the research team in face-to-face meetings. Where the placement of statements was contested, the team were able to reach agreement over which statements best represented which domains. Intervention development via focus groups allowed the team to present and discuss the results of this process with stakeholders. This provided a structure for stakeholder consultation, and an opportunity for 'member checking' , with participants able to review and confirm which aspects of the team's decision-making made sense to them [60][61][62]. It also enabled the research team to explore how intervention content and mode of delivery might resonate with its intended audience.
The original study on which this paper is based was conducted in 2016-18. The theoretical principles used in the study have developed considerably -not only have citations of the TDF increased exponentially since the framework was first created, but the pace of change and refinement has been fierce, leaving published study methodologies lagging behind theoretical developments [46,51,53,55,63]. Further exploration of behavioural constructs have been systematic and methodical, and the protocol for developing intervention content from qualitative data described in this paper is replicable using the more recent Theory and Techniques Tool [54] to map the TDF domains on to behavioural change techniques.

Strengths and limitations of the study
Recruitment for the original qualitative study lacked diversity in terms of the ethnicity. Study material was distributed to all women on GP lists who were more than 1 year overdue for cervical screening, but all volunteers were white British. The original study did not record the ethnicity of those who were approached for participation, only of those who volunteered for interview (potential interviewees were recruited by practitioners and their details passed on to the research team, with their permission, to maintain confidentiality). While the practitioner focus groups for intervention development were more ethnically diverse, patient data considering demographic and ethnic diversity, while present, was sparse.  Table 4 How key issues from stakeholder focus groups converted into action points in the animation script

Good practice points
Areas of focus group discussion

Focus of animation script
1. Identify and communicate with non-attenders who are over 50.
• Link cervical screening with chronic illness reviews, carer reviews, etc.
• Have regular practice meetings raising patients' individual issues.
• Raise awareness, address myths and misunderstandings. • Prepare: Address physical and psychological issues, build a network of professional support to develop your expertise.
• Listen: Take patient history, build rapport, address psychological and physical challenges.
• Adapt: Where possible and practical, take a flexible approach to appointment booking, and to screening procedures (e.g. positioning).
2. Make appointments flexible in a way which encourages attendance in older women • Offer repeat appointments over time rather than one-off appointment.
• Offer extended hours (dependent on capacity).
• Network with other screen-takers in your GP practice.
• Allow your patients to choose their screening practitioner.
3. Develop rapport with older women attending for screening.
• Inform patients about how screening procedures have changed.
• Proactively ask women why they do not attend.
• Talk through the procedure, inform women in personal manner.
• Encourage collaboration between older and younger practice nurses to talk through age-related issues.
• GPs to be made aware of reasons for appointments in advance.
4. Tailor the screening process to take older women's needs into account. • Discuss and address sexual difficulties caused by menopause and/or chronic illness.
• Have all tools ready in advance, do not leave the room, actively problem solve environmental issues (e.g. broken door locks) in a timely manner.
• Learn to 'size' women for appropriate speculum as they enter the room.
• Allow women to insert speculum themselves.
• Practice different positioning for older women to take account of mobility problems.
• Have senior screening staff in attendance to offer practical advice.
• Invest in rapport-building with colposcopy units to draw on expertise where screening is difficult. This limited the exploration of the intersection between ethnicity and age. Demographic homogeneity is often encountered in stakeholder consultation with older people [64], and our efforts at inclusivity were inevitably guided by the voluntary response to the interview study. We believe that the methodology of intervention development used in this study was recriprocal and iterative, and would work with other similarly homogeneous groups in different contexts. In locations where the community-based participatory approaches described in our introduction are not viable for reasons of time and cost, smaller studies with culturally homogeneous groups using behavioural change theory could highlight aspects of commonality and divergence and elucidate aspects of demographic diversity in this cohort of women over 50.
The key strength of the study was the inclusion of the practitioner perspective. The practitioner/service-user relationship is a crucial aspect of the health service context, and this interrelationship of perspectives was a key focus of the qualitative data, which reflected the central importance of history-taking, relationship building and rapport necessary for women's comfort with the cervical screening process. The centrality of such relationships is also evident in community-based research -for example, in the engagement of community health navigators to facilitate screening [65]. The practitioner focus groups in our study raised cultural issues surrounding the intimacy and potential invasiveness of the cervical screening test, and discussions explored how culturally specific research using similar methodologies might further inform practice in demographically diverse areas.

Conclusion
Despite the broadening literature describing the use of behavioural theory to develop interventions, there is ongoing debate about the efficacy of this approach [43]. In the area of cervical screening, existing interventions to encourage attendance are not easily comparablereviews evidence a great deal of heterogeneity in study designs and a lack of description of the foundations of intervention content, and often fail to include lessons learned from the successful engagement of stakeholders in community based approaches. We would argue that the use of theory can focus the intervention development process and keep intervention content aligned with the priorities of stakeholders. The Theoretical Domains Framework, in combination with the Theory and Techniques Tool [54], offers a stepwise, auditable protocol for developing intervention content which is amenable to clear reporting and replication in different local contexts. The detailed reporting of protocols for translating qualitative research into intervention content is imperative to achieving transparency, consistency and quality in the material that we chose to test and evaluate. It will also allow a deeper exploration of how stakeholder perspectives might successfully contextualise interventions for specific local populations.