Experiences of interventions aiming to improve the mental health and well‐being of children and young people with a long‐term physical condition: A systematic review and meta‐ethnography

Abstract Background Children and young people with long‐term physical health conditions are at increased risk of experiencing mental health and well‐being difficulties. However, there is a lack of research that explores the experiences of and attitudes towards interventions aiming to improve their mental health and well‐being. This systematic review seeks to address this gap in the literature by exploring what children and young people with long‐term conditions, their caregivers, and health practitioners perceive to be important aspects of interventions aiming to improve their mental health and well‐being. Methods An information specialist searched five academic databases using predefined criteria for qualitative evaluations of interventions aiming to improve the mental health or well‐being of children with long‐term physical conditions. Reviewers also performed supplementary citation and grey literature searches. Two reviewers independently screened titles, abstracts, and full texts that met the inclusion criteria and conducted data extraction and quality assessment. Meta‐ethnography was used to synthesize the findings. Results Screening identified 60 relevant articles. We identified five overarching constructs through the synthesis: (a) Getting In and Staying In, (b) Therapeutic Foundation, (c) Social Support, (d) A Hopeful Alternative, and (e) Empowerment. The line of argument that links these constructs together indicates that when interventions can provide an environment that allows young people to share their experiences and build empathetic relationships, it can enable participants to access social support and increase feelings of hope and empowerment. Conclusion These findings may provide a framework to inform the development of mental health interventions for this population and evaluate existing interventions that already include some of the components or processes identified by this research. Further research is needed to establish which of the constructs identified by the line of argument are most effective in improving the mental well‐being of young people living with long‐term conditions.

that already include some of the components or processes identified by this research.
Further research is needed to establish which of the constructs identified by the line of argument are most effective in improving the mental well-being of young people living with long-term conditions. KEYWORDS children, intervention, long-term condition, mental health, qualitative research methods, systematic review, well-being 1 | INTRODUCTION Children and young people (CYP) living with long-term physical health conditions (LTCs) are up to four times more likely to experience mental health or well-being difficulties than their physically healthy peers (Hysing, Elgen, Gillberg, Lie, & Lundervold, 2007;Pinquart & Shen, 2011). The negative impact on quality of life of mental health problems alone can be as great as, or even more significant than, the impact of the LTC (Baca, Vickrey, Caplan, Vassar, & Berg, 2011). Mental ill health can also exacerbate physical health symptoms, which may then increase the risk of poorer long-term outcomes, such as symptom control and medication adherence (Lustman & Clouse, 2005).
Between £8 and £13 billion of National Health Service (NHS) spending in England is linked to co-morbid mental health problems among adults and children with LTCs (Naylor et al., 2012). Psychological interventions can reduce healthcare costs associated with inpatient hospital admissions by up to 20% (Chiles, Lambert, & Hatch, 1999;Naylor et al., 2012). This highlights the importance of access to timely, evidence-based mental health and well-being treatments for people living with LTCs. Unfortunately, there is a paucity of research examining the effectiveness of psychological interventions for alleviating symptoms of mental ill health, such as anxiety or depression, amongst CYP with LTCs (Bennett, Shafran, Coughtrey, Walker, & Heyman, 2015). Existing trials are underpowered and of low quality, with heterogeneity in intervention design and outcome measures limiting the confidence, which can be placed in research findings (Bennett et al., 2015;Moore et al. 2019).
In addition to research evaluating the effectiveness of interventions aiming to improve the mental health of CYP with LTCs, understanding the experiences and perceptions of CYP and their families and the people delivering interventions is a crucial step in understanding the impact of existing interventions on the child themselves, as well as the family and social system around them. Patient and practitioner views provide a valuable addition to quantitative measures of effectiveness by identifying factors that may act as barriers or facilitators to implementing evidence based medicine (Green & Britton, 1998). Patient attitudes and experiences also offer valuable information regarding the wider context in which health services are delivered (Lorenc, Pearson, Jamal, Cooper, & Garside, 2012) and should inform the development and delivery of new health services (Department of Health, 2015;NHS England, 2014).
Although qualitative evidence syntheses have been conducted that explore CYP's experience of their LTCs and the impact on their lives (Lum et al., 2017;Venning, Eliott, Wilson, & Kettler, 2008), none have examined the views of key stakeholders on interventions aiming to improve the well-being of CYP with LTCs, despite the existence of primary qualitative research within this area. Here, we aimed to explore the views and experiences of CYP with LTCs, their caregivers, and practitioners of interventions intended to improve the mental health and well-being of CYP with LTCs. We utilize a systematic review methodology to address this aim in answer to a specific call from the National Institute of Health Research. This article reports the

Key Messages
• The line of argument presented within this paper explores the relationship between the five constructs developed through the qualitative evidence synthesis: "Getting In and Staying In," "A Therapeutic Foundation," "Social Support," "Hope and Inspiration," and "Empowerment." • Social support from peers and the people delivering the intervention appear to play a key role in supporting CYP to access an intervention, gain new skills, and develop an alternative, more hopeful view for the future.
• Ensuring that interventions are sustainable, accessible, and relevant to CYP's mental health needs can create the opportunity for CYP to engage with the therapeutic potential of an intervention.
• A Therapeutic Foundation where CYP feel safe, valued, and able to express themselves is a core component of mental health interventions.
• The interaction between feelings of increased hope, empowerment, and improved social support may help sustain improvements to CYP's mental health beyond the end of the intervention.
• Process evaluations should be incorporated alongside randomized controlled trials to explore which interventions are effective and for whom. relationship between the key constructs arising from the evidence identified by the qualitative systematic review conducted by Moore et al (2019) and aims to provide an accessible summary of the factors CYP, their parents, and professionals identify as being important within mental health and well-being interventions for CYP with LTCs.

| Key definitions
CYP were defined as individuals aged from birth to 25 years. We considered several of the most commonly used definitions in the literature (Perrin et al., 1993;Pless & Douglas, 1971;Stein, Bauman, Westbrook, Coupey, & Ireys, 1993) to define long-term physical health conditions as "diagnosed physical health conditions, with an expected duration of at least three months, where cure is considered unlikely, causing limitations in ordinary activities and necessitating medical care, or related services, beyond what is usual for age in question." 1 This review considers the term mental health to encompass more than the absence of psychiatric disorders to include the concepts of adjustment, wellbeing, and coping, as is consistent with other well-known definitions of mental health (Keyes, 2005;Nastasi & Borja, 2016). The current review was, therefore, not restricted to samples with emotional or behavioural symptoms.

| METHODS
The review protocol was registered on PROSPERO (doi:10.15124/ CRD42015027353), conducted according to best practice guidelines (Centre for Reviews and Dissemination, 2009) and reported according to the ENTREQ statement (Tong, Flemming, McInnes, Oliver, & Craig, 2012).

| Search strategy and article selection
The pre-planned strategy used controlled headings (e.g., MeSH) and free text searching. Search terms were grouped according to four concepts: CYP, mental health, long-term physical conditions, and type of qualitative study design or analysis (See Appendix A for an example search strategy used within PsycINFO). An information specialist  Table 1.
Full texts of potentially eligible articles were screened in the same way. Disagreements were resolved through discussion between two members of the core review team (D. M., M. N., and L. S.). Reviewers recorded screening decisions within Endnote X7. checked each extraction, with disagreements resolved through discussion. The 13 quality appraisal items used were based upon the Wallace checklist (Wallace, Croucher, Quilgars, & Baldwin, 2004). We added an additional question: "Are the interventions of interest clearly described?" based upon a previous review on intervention experience . Article quality was not used as a basis for inclusion in the review but informed the confidence reviewers could place in the synthesis findings. Greater weight was given to papers containing a higher quantity of more conceptual or interpretative data within the synthesis, consistent with other systematic reviews using metaethnography (Cochrane Methods: Qualitative and Implementation, 2018).

| Data synthesis
Reviewers synthesized the data using meta-ethnography (Noblit & Hare, 1988). This approach has been applied in health research for interpreting findings across qualitative studies (e.g., Frost, Garside, Cooper, & Britten, 2014) and permits the comparison of different data sets, with the interpretation incorporated throughout the analytical process resulting in a final synthesis that constitutes more than "a sum of its parts" (Barnett-Page & Thomas, 2009, p. 8). Metaethnography consists of four stages of analysis: 1. Reading and rereading the included studies to ensure that reviewers were familiar with each article This phase began during study selection and continued throughout data synthesis.

Determining how the studies were related
Structured summaries enabled comparisons of information across different articles (Frost et al., 2014). Summaries included the following information: participant's perspective, type of LTC, mental health intervention target (e.g., procedural anxiety, depression, and coping), and any additional non-mental health intervention targets (e.g., LTC management and social skills).

Reciprocal translation of studies
L. S. extracted quotes and author interpretation of the material provided by study participants, known as first-and second-order construct data (Atkins et al., 2008), from the results and discussion of each article. L. S. compared this data across included studies and developed concept maps to show the relationships between analytical ideas and themes. These were checked by a second reviewer (D. M). L. S. used NVivo v.11 software to conduct line-by-line coding, against a framework developed from these concept maps. This process identified new ideas that were either not included or conflicted with the initial coding framework, meaning each included article was re-examined in an iterative cycle of analysis.
Reviewers began by synthesizing articles containing two or more pages of conceptually rich data. This prioritized articles that had the potential to have the greatest influence on developing constructs.
The reviewers then used a maximum variation purposive sampling strategy (Suri, 2011) to introduce articles containing less interpretive data into the reciprocal translation process. For detail regarding the purposive sampling approach, see Table S1 and Appendix C.

Synthesizing translations/creating a line of argument
Reviewers initially synthesized the views of CYP, parents, and practitioners separately to ensure any differences in the views and/or experiences between these groups were identified. L. S. and D. M. also considered the experiences of interventions targeting procedural anxiety separately (see Appendix C). Due to the similarity between themes emerging from these populations, themes for each individual group were not reported. Reviewers considered the influence of CYP's age, LTC, and type of intervention received during theme development.
L. S. grouped related themes together to form five overarching constructs, which were checked by two reviewers (D. M. and R. G.) and reported in full within the project report . Each overarching construct was informed by at least 10 articles that achieved 10 or more positive ratings on the Wallace checklist (Wallace et al., 2004). A line of argument model was developed that describes the relationships between each overarching construct and the themes contributing to them.

| RESULTS
Database searches identified 12,285 records, with 1,118 additional records found through a combination of grey literature searches, citation chasing, and reference list searches of relevant reviews. Following the screening process outlined in the Preferred Reporting Items for

Intervention
Included if ○ intervention aimed to improve CYP's mental health and well-being, ○ intervention targeted CYP's mental health directly (i.e., CYP were recipients) or indirectly (e.g., parenting interventions), ○ attitudes towards an intervention in development or interventions they chose not to receive. Exclude if ○ focus on mental health service provision rather than specific interventions.
Outcomes Include ○ attitudes, experiences, perceptions, and understanding of CYP with LTCs, their parents, or the practitioners who have delivered such interventions regarding interventions focused on the mental health/well-being of CYP with LTCs.

Study design
Include if ○ qualitative data collection, e.g., interviews and focus groups, ○ qualitative data analysis, e.g., thematic analysis, framework analysis, and constant comparative method, ○ may be stand-alone qualitative research or reported as part of a mixed methods intervention evaluation or process evaluation.

Exclude if
○ qualitative data only provided through open-ended questionnaire items.
Country and language Include if ○ full text is in English, ○ Organisation for Economic Coorperation and Development (OECD) setting.
Abbreviations: CYP, children and young people; LTC, long-term physical health condition.
Systematic Reviews and Meta Analysis (PRISMA) guidelines (see Figure 1), 60 articles (from 57 studies) were eligible for inclusion (see Appendix D). Articles from the same study typically described intervention experiences in different levels of detail, influencing the stage they entered in the reciprocal translation process (Table S1).

| Study characteristics
The 57 included studies were published between 1991 and 2016 and conducted in seven different countries, the most common being the USA (n = 25), Canada (n = 13), and the United Kingdom (n = 9).
The most common data collection strategies utilized within the primary studies were interviews (n = 48), focus groups (n = 5), or analysis of posts made within online discussion forums (n = 4). Median sample size was 23 participants (range 3-100). Twenty studies included only CYP, one study collected data from only the practitioners delivering the intervention, and four studies collected data from parents alone.
The remaining studies included views from participants from more than one participant group. The most common types of intervention were categorized by reviewers (D. M., L. S., and M. N.) as Online support interventions (n = 12), Camps (n = 9), and Music therapy (n = 6). Table S1 provides detail regarding the focus of each study, method of analysis, and intervention type for each study.
The most common type of LTC were cancer (n = 14), HIV (n = 8), and a mix of LTCs (n = 10). Interventions focused on improving aspects of emotional well-being, such as coping (n = 26), self-esteem (n = 13), or providing emotional support (n = 11), although symptoms of mental ill health were not routinely measured. Other intervention aims included improving physical symptoms relating to the LTC and social skills. Table S2 outlines the structure and setting of each intervention.
Only 13 articles scored positively on at least 12 quality appraisal questions (see Table S3). Articles typically described their data collection method, had clear research questions, used an appropriate study design, and had findings supported by data. However, the theoretical or ideological perspective of the author was not reported in 45 articles; thus, its influence upon the study design, methods, or research findings could not be determined.

| Line of argument
Five overarching constructs arose from the translation of first-and second-order construct data across all 60 articles: "Getting In and FIGURE 1 PRISMA diagram Staying In," "A Therapeutic Foundation," "Social Support," "A Hopeful Alternative," and "Empowerment." Table 2 provides examples of participant quotes supporting each construct, with Table S4 providing details of the articles which support each subtheme. Figure 2 conceptualizes the line of argument. A "Therapeutic Foundation" is essential to enable CYP and their families to achieve benefit from an intervention. "A Therapeutic Foundation" may support CYP and their families to access and provide Social Support as Clearly, greater availability of a range of educational materials and group or individual interventions combined with ease of access will be of paramount importance in the future (Barlow, Shaw, & Harrison, 1999).
"They said they only had one social worker for the outpatient department and it was all very difficult for them to see him" [Parent, ] (Lewis, Klineberg, Towns, Moore, & Steinbeck, 2016, p. 2546). The habitat of fun consisted of abundance and opportunities for transgressions, which were grounded in an unceasing focus on campers' enjoyment and engagement (, Witt, & Watts, 2011).
Again, some participants would have changed the meeting time to make it more convenient for families (Brodeur, 2005). topics that cannot be discussed elsewhere and where one feels that they are just like everyone, are important for all children and teens. Feeling "normal" is even more important when one lives with a condition that is often kept secret due to associated shame and stigma (Muskat, Salter, Shindler, Porter, & Bitnun, 2016).
"My family, not really, and outside like friends no, cause you do not really know who to trust. And even in my family it's awkward to talk about but here I know I can talk about it with these people and that's really good. I like feeling that I can talk to someone, it's really good, yeah … Here you feel like it's not taboo, you know" [CYP, HIV] (Muskat et al., 2016, p. 8).
Campers expressed feeling a sense of love, respect, happiness, and caring throughout their time at camp ( et al. 2006).
"I would take from camp the vibe that I getthe vibe of caring and respect and love that is just emanating through everything, through every activity in the cabins and everywhere" [CYP, Mixed LTCs] (Gillard et al., 2016, p. 116).
Social Support Several participants talked about how they felt the program had brought their family closer together (Brodeur, 2005).
"We realized the necessity just to set aside time. How well we do it is a different story. But realized the necessity to sort of just set everything aside and just be together and play Monopoly or whatever" [Parent, ] (Brodeur, 2005, p. 170 Although some of the concepts discussed within each construct may be more pertinent at certain stages of an intervention, the relationships between constructs 2, 3, and 4 are bidirectional and selfreinforcing and promote continued engagement with the intervention.
The longer CYP and families engage with an intervention, the more they are likely to develop therapeutic relationships with intervention deliverers and/or other participants and experience the therapeutic benefits associated with the intervention. Thus, the therapeutic effect of these bidirectional relationships could be regarded as accumulative over time. 'Getting In and Staying In' describes factors that may influence the availability and accessibility of an intervention as well as the ongoing engagement of people taking part and discusses how the social relationships, increased sense of empowerment, and hope developed through taking part in an intervention are key to prolonging its benefits beyond its endpoint.

| Getting In and Staying In
This construct conceptualizes CYPs ongoing interaction with an intervention aimed at improving their mental health: from the initial

A Hopeful Alternative
The mentees admired their mentors. Numerous mentees reported adopting and emulating parts of their mentors' behaviour regarding diabetes (Barnetz, 2012).
"It was fun like it's never been before, I saw someone who is in control of the situation and is not afraid of diabetes. If he can do it, I've got to succeed....I'm less afraid because of the project; I met people there with amazing abilities" [CYP, T1D] (Barnetz, 2012, p. 474). When asked what young HIV-positive women need to make healthier life choices and decrease risky behaviors, participants emphasized the need for comprehensive programs that extended beyond HIV specific topics. They requested programs that address a wide range of issues impacting their lives such as selfesteem, self-confidence, self-worth, living with HIV, sexuality, coping mechanisms, handling adversity, and developing and maintaining healthy relationships (Hosek et al., 2012).
"My perfect program would not just not only be focused on the infection. It would just really be building self-worth, building self-esteem like all the way around. So many youth have a hard time just making that transition perhaps to the college, and still be like do they have to take care of themselves, either by nutrition …" [CYP, HIV] (Hosek et al., 2012, p. 293).
During the program, all participants noted that they had increased their overall daily physical activity, incorporated planned physical activities into their daily schedules ( Empowerment Several participants also discussed the benefits of skills-based education and learning strategies to manage diabetes in public (Serlachius, Northam, Frydenberg, & Cameron, 2012).
"Like strategies, or ways to deal with the public thing. Like developing a skill where you stop worrying about what strangers would think, for example at the footy" [CYP, T1D] (Serlachius et al., 2012, p. 319). As part of the rigorous program within the camp, participants realized success in mastering difficult tasks (Tiemens, Beveridge, & Nicholas, 2007).
"I was like, 'wow' you know, hard things that you overcome, you are, kind of feel that you are such a good person" [CYP, CFD] (Tiemens et al., 2007, p. 65). Initial uncertainty or reservation was replaced by a sense of pride, competence, and mastery (Burns, Robb, Phillips-Salimi, & Haase, 2010).
"So it was that short little brief of 'I am in control … this is my project' was really, really good for him" [Parent, Cancer] (Burns et al., 2010, e24).
recognition of their mental health need(s) and support from professionals, maintaining engagement over time, and retaining the effects of the intervention after it has ended.
To make interventions available to those who need them, service providers should ensure they have adequate funding for equipment (e.g., Nicholas et al., 2007), staff expertise in intervention design and delivery (Whittemore, Grey, Lindemann, Ambrosino, & Jaser, 2010), and space to stage an intervention ( et al., 2016 Recognizing the social and family context of CYP was key to ensure they had the appropriate social support available to enable them to maintain engagement with an intervention over time. Parents highlighted the importance of flexibility in the delivery of interventions, such as considering the time of day (e.g., Brodeur, 2005) and setting (e.g., Muskat et al., 2016). Providing opportunities for CYP to maintain the peer relationships formed during an intervention via social media (e.g., Kirk & Milnes, 2016)  Consideration of the factors that may influence the availability and accessibility of interventions increases the likelihood that participants engage with an intervention long enough to access its therapeutic potential, a concept described within the construct A Therapeutic Foundation.

| A Therapeutic Foundation
This construct describes the emotional experience that results from the interaction between CYP feeling safe, unconstrained by their LTC, and having the opportunity to develop "therapeutic" relationships with intervention deliverers and/or fellow intervention recipients.
The presence of familiar people (e.g., Ayres et al.; Dennison et al., 2010) and ensuring that there are rules encouraging appropriate behaviour (e.g., Brodeur, 2005;Desai et al., 2014) and protect the privacy and/or anonymity of CYPs (e.g., Nicholas et al., 2007;Stewart et al., 2013a) can support participants to feel secure within an intervention setting. This perception of safety can help CYP "escape" the stigma and worry associated with their LTC experienced during their daily lives (e.g., Muskat et al., 2016). This feeling of being unconstrained can be facilitated by activities that distract CYP from the pain FIGURE 2 Line of argument or boredom associated with long hospital stays (O'Callaghan, Dun, Baron, & Barry, 2013;Docherty et al., 2013) or help them overcome physical limitations associated with their LTC (Gillard & Watts, 2013).
Feeling unconstrained within a safe space supports CYP to freely share their emotions and experiences (e.g., Fair et al., 2012). Given enough time, the unconstrained sharing of emotions and experiences can lead to the development of supportive "Therapeutic Relationships" between CYP taking part in the intervention (e.g., Tiemens et al., 2007). These relationships seem to be characterized by CYP feeling understood, cared for, and valued (e.g., Brodeur, 2005;Fair et al., 2012;. Together, the concepts described above can create a therapeutic atmosphere, which we suggest could enhance the well-being of CYP with LTCs by itself. This 'Therapeutic Foundation' also creates the potential for those receiving the intervention to engage with the social support offered by peers and experience feelings of hope and empowerment.

| Social Support
This construct conceptualizes 'Social Support' as the sense of belonging experienced by CYP as they meet other peers with an LTC and the opportunity to learn new skills and improve relationships with healthy peers and family outside of the intervention setting.
Sharing experiences with intervention deliverers, peers, and/or family within a safe environment allows CYP to receive reassurance that they are not alone living with the difficulties they are experiencing (e.g., Campbell et al., 2010;Gan et al., 2010). CYP described experiencing powerful feelings of belonging within interventions that allowed them to meet peers similar to themselves (e.g., Gillard & Allsop, 2016). This experience of belonging can further contribute to the therapeutic atmosphere described within 'A Therapeutic Foundation'.
Meeting similar peers also helps CYP learn how to replicate the empathetic, understanding, and validating relationships they valued as part of an intervention and improve their relationships with others outside of the intervention setting (e.g., Bignall, Luberto, Cornette, Haj-Hamed, & Cotton, 2015;Desai et al., 2014). This can be achieved directly by involving family with the intervention (e.g., Gan et al., 2010) or indirectly through CYP applying the skills they learned outside of the intervention setting (e.g., Hosek et al., 2012;Stewart, Barnfather, Magill-Evans, Ray, & Letourneau, 2011;Stewart, Masuda, Letourneau, Anderson, & McGhan, 2011). The type of social support most appreciated by CYP with LTCs may vary according to their individual preference, age, LTC, and developmental level. The need for contact with similar peers may increase as CYP become more aware of their social surroundings and encounter the typical challenges associated with this developmental stage.
Over the course of the intervention, there seems to be a transition from building therapeutic relationships with peers and staff within an intervention setting to replicating these types of relationships within the CYPs everyday family and social systems. This process may be facilitated by the feelings of hope and empowerment generated through participation in an intervention, as detailed within A Hopeful Alternative and Empowerment below.

| A Hopeful Alternative
This construct describes how meeting peers and taking part in everyday activities can help CYP develop a sense of hope for the future and an identity not solely focused on their LTC.
CYP described how having the opportunity to meet other CYP who are currently managing the challenges of living with their LTC (e.g., Barnetz & Feigin, 2012;White, 2014) can result in a realization that it is possible to live an enjoyable life despite the presence of an LTC. This may in turn motivate them to engage with others participating in the intervention and both teach and learn new skills to manage their physical and mental health.
CYP appear to value recognition that they are able to support others (e.g., Desai et al., 2014;Nicholas et al., 2007;Tiemens et al., 2007) and not merely the passive recipients of help. This realization may enable participant to offer support to others as depicted under A Therapeutic Foundation and Social Support. Thus, taking part in an intervention can be experienced as a collaborative process, where everyone brings expertise.
Consideration of the family and social systems that CYP belong to within the intervention (as discussed within Getting In and Staying In) may support the recognition that the child is more than their physical illness. Integrating aspects of daily life into interventions, such as completion of everyday chores, hobbies, and non-LTC-orientated conversation with family members (e.g., Dennison et al., 2010;Nicholas et al., 2007), appeared to aid CYP's realization that they could be "normal" despite their LTC. However, the needs of CYP who require endof-life care may be different and should be met accordingly.
It appears having the opportunity to observe peers successfully managing life with an LTC, take part in everyday activities, and contribute meaningfully to their relationships with others can help CYP visualize a hopeful future for themselves, which can have a positive influence in their mental health.

| Empowerment
The interlinked and self-reinforcing relationship between a young person's increased sense of their own ability to manage themselves and increased self-esteem are conceptualized here as Empowerment.
Social support can help CYP acquire knowledge and skills regarding how to manage their physical, emotional, and social difficulties (Marsac et al., 2012;Stewart et al., 2013a). As they master these skills, CYP develop a sense of confidence in their own abilities to manage their future physical (e.g., Barnetz & Feigin, 2012) and mental (e.g., Jaser, Patel, Linsky, & Whittemore, 2014) health needs. There appears to be an interaction between feelings of increased hope and empowerment.
Feeling empowered to manage their own well-being may provide CYP with increased hope for their future. In turn, the experience of successfully completing fun, challenging and/or normative activities not associated with their LTC (e.g., Moola, Faulkner, White, & Kirsh, 2015) can lead to feelings of empowerment and increased self-esteem. We suggest there needs to be a balance between participating in activities that challenge them, with the need for these activities to be tailored to their developmental and health needs. This balance will ensure that CYP with LTCs can experience success and feel empowered.  (2015) propose the concept of "esteem support," which encompasses "validation" and "compliment," ideas included within the constructs 'Therapeutic Foundation' and 'Hope

| Strengths and limitations
This review was conducted according to best practice guidelines (CRD, 2009). The purposive sampling procedure described within the methods section meant each of the 60 articles included in this review contributed towards the final synthesis. Although the large number of studies and variety of interventions included in the review may have made it harder to report nuances within the data, each of the five overarching constructs was informed by a large number of articles, with at least 10 of these receiving a "high"-quality rating. We relied upon the self-report and reflexivity of the authors of primary studies to identify how their ideological approach influenced their results, which may have influenced our findings.
The constructs identified within this synthesis may represent core therapeutic components common across different types of interven-

| Recommendations for future research and practise
This reviews findings review suggest that interventions to assist CYP with an LTC to improve their social support networks, develop a sense of hope, and feel empowered may improve their mental health and well-being. The five constructs identified by this review offer a potential framework for health and social care professionals to consider when developing or refining existing interventions to improve and/or main-  *Articles that reported views of multiple population groups but synthesized the views of CYP, parent, and/or practitioner views separately were included in multiple groups within this synthesis. Thus, total number of articles included across different groups exceeds 20. † See Table   S1 for details regarding at which stage each included article entered the reciprocal translation process.