key: cord-322511-hnvqvajx authors: Speerin, Robyn; Needs, Christopher; Chua, Jason; Woodhouse, Linda J.; Nordin, Margareta; McGlasson, Rhona; Briggs, Andrew M. title: Implementing models of care for musculoskeletal conditions in health systems to support value-based care date: 2020-07-25 journal: Best Pract Res Clin Rheumatol DOI: 10.1016/j.berh.2020.101548 sha: doc_id: 322511 cord_uid: hnvqvajx Models of Care (MoCs), and their local Models of Service Delivery, for people with musculoskeletal conditions are becoming an acceptable way of supporting effective implementation of value-based care. MoCs can support the quadruple aim of value-based care through providing people with musculoskeletal disease improved access to health services, better health outcomes and satisfactory experience of their healthcare; ensure the health professionals involved are experiencing satisfaction in delivering such care and health system resources are better utilised. Implementation of MoCs is relevant at the levels of clinical practice (micro), service delivery organisations (meso) and health system (macro) levels. The development, implementation and evaluation of MoCs has evolved over the last decade to more purposively engage people with lived experience of their condition, to operationalise the Chronic Care Model and to employ innovative solutions. This paper explores how MoCs have evolved and are supporting the delivery of value-based care in health systems. Models of Care (MoCs), and their local Models of Service Delivery, for people with musculoskeletal conditions are becoming an acceptable way of supporting effective implementation of valuebased care. MoCs can support the quadruple aim of value-based care through providing people with musculoskeletal disease improved access to health services, better health outcomes and satisfactory experience of their healthcare; ensure the health professionals involved are experiencing satisfaction in delivering such care and health system resources are better utilised. Implementation of MoCs is relevant at the levels of clinical practice (micro), service delivery organisations (meso) and health system (macro) levels. The development, implementation and evaluation of MoCs has evolved over the last decade to more purposively Value-based care was first discussed by Berwick in 2008 as a triple aim of measuring health outcomes, improved patient experience and better use of health resources [21] . Porter added to the concept by including health professionals' experiences, seen as an important factor in achieving valuebased care. Value-based care can be viewed as a continuum from high to low. 'High-value' care refers to care for which evidence suggests it confers benefit on patients, or probability of benefit exceeds possible harm, or, more broadly, the added costs of the intervention provides proportional added benefits relative to alternatives [22] . Are MoCs supporting the shift to value-based care across the quadruple aim? Does the evolution of MoCs for people living with musculoskeletal conditions support the achievement of the quadruple aim? The paper will reflect on the changing attitudes towards healthcare by all stakeholders in the health system. Consideration of some of the workforce requirements to deliver the health outcomes will be discussed, along with progress of consumer and clinical experiences. Are better health outcomes being achieved? Evolution of contemporary models of care for musculoskeletal conditions MoCs were borne from frustration that traditional clinical pathways developed from evidence-informed healthcare were not being implemented for individuals, let alone across health settings and systems, resulting in unacceptable care variation and inequity in access to care [23e25] . Evolving population health states, changing health requirements and expectations of the patient and their families, and changing approaches to care, mandated that a different approach to care planning, delivery and participation be taken. MoCs were conceived to combine best practice healthcare and other services that are important to the person, population group or patient cohort across the continuum of a condition, injury or health event. MoCs aim to ensure people get the right care, at the right time, by the right team, in the right place, with the right resources [26e28]. MoCs for long-term conditions represent a shift from episodic provision of care to meet crisis situations, to care delivery across the disease continuum and life course [29, 30] . The chronic care approach and the biopsychosocial model While the Chronic Care Model proposed by Wagner et al. in the 1990s [31] and the biopsychosocial model proposed by Engel in 1977 [32] are not new, the acceptance and integration of these personcentred and multidimensional approaches into care planning and delivery continues to evolve beyond the historic reductionist biomedical model. For the majority of long-term musculoskeletal conditions, application of the reductionist biomedical model has not been effective in improving outcomes [33e35] . Thus, the Chronic Care approach and the biopsychosocial model are now central foci for MoCs for long-term conditions. They are particularly relevant to musculoskeletal MoCs, where target conditions are typically life-long and associated with persistent pain and functional impairment, and require interaction with a range of health services over decades from primary care to specialist medical and surgical services, even if intermittent. In Chronic Care, self-management support remains a fundamental component of effective care. Operationalising these approaches within MoCs requires consideration of the person's lived experience (incorporating biological, psychological and social sequelae), person-centred health outcomes and their experiences of care. Recent debate in chronic pain care, for example, suggests that the biopsychosocial model of pain care is inadequately fit for purpose and needs to evolve further towards a sociopsychobiological MoC [34] . The inclusion of the person's lived experience of a condition(s), including the psychosocial sequelae, is now accepted as fundamental to designing, implementing and evaluating MoCs. In order to understand and listen to those who know the condition best e the person living with the condition and their family/carer e several elements have been added to the development, delivery and evaluation of MoCs in recent years [18] . This a clear shift from MoCs developed prior to the past decade or so. This shift has seen health teams, organisations and systems working to incorporate these concepts within musculoskeletal MoCs through the use of multi-stakeholder networks, such as those in Western Australia and New South Wales, Australia (see https://ww2.health.wa.gov.au/Articles/J_M/ Musculoskeletal-Health-Network and https://www.aci.health.nsw.gov.au/networks/musculoskeletal). While efforts were made in the past to include the lived experience, recent thinking and evidence has revealed that an even higher level of partnership between stakeholders is required to develop health services that meet the needs of those who access them as recipients of care [36] . Therefore, methodologies, such as Clinical Redesign [37] , Shared Decision-Making [38] and Co-Design [30] , have been used in recent years to facilitate this in-depth level of partnership. Incorporating advice borne from experience can richly inform 'what' and 'how' care should be delivered in a local system. With the voice of the lived experience augmenting clinical experience and healthcare evidence concerning a particular condition, the resulting care is more likely to be acceptable to all involved and better reflect care that is high value [39e42]. Critically, satisfaction of receivers of care is more likely to be associated with effective and active participation in their healthcare requirements [43, 44] . Measuring what matters to people: patient-reported measures Patient-reported measures (PRMs) have evolved as a mechanism to report on and incorporate the patient voice in MoCs. PRMs enable evaluation of healthcare, and can inform higher value-oriented changes to health services and health systems [45, 46] . PRMs are commonly classified as two separate outcome measures: patient-reported outcome measures (PROMs) and patient-reported experience measures (PREMs). Studies have shown that inclusion of PROMs enhances treatment decisions, patient satisfaction and subsequent adherence to agreed treatments [47, 48] . Systematic review evidence points to the likely benefit of using PROMs in healthcare [49] . PREMs indicate the patient's perspective on issues, such as access to care, how they were approached and included in their treatment decisions [49e51]. While satisfaction surveys have long been a part of MoCs, PREMs are relatively new with few tools to support their inclusion in clinical practice with local teams often developing their own. PROMs have the ability to identify issues that may not be elucidated during clinical assessments. There is appreciation now that background psychological issues, such as depression, anxiety and an individual's health beliefs and expectations, may impact upon recovery and their participation in care. This has led to specific PROMs, such as those that assess important person-centred impacts of living with a condition (e.g. in the management of people with back pain [52] ) and others that focus more on generic issues that occur across healthcare needs, inclusive of social requirements [53] . As such, PROMs have the dual capability of informing clinicians as to the whole of health impact of disease while at the same time providing a conduit via which previously unstated patient concerns may be addressed. PROMs and PREMs are important components to the quadruple aim of value-based care. Innovation in development and implementation of models of care and service delivery As our understanding of the requisite components and practices for developing MoCs and MoSDs evolve, innovation in development practices similarly evolves. Like many other countries, early and appropriate conservative care for osteoarthritis (OA) remains underutilised in New Zealand (NZ). Currently, NZ has an outcomes framework for service development and commissioning for long-term conditions [54] , including specific strategies for diabetes [55] and healthy ageing [56] . However, no frameworks or policies specifically exist for musculoskeletal healthcare. In response to this gap, in 2015, the NZ government allocated NZD 6 million over 3 years to trial and evaluate local healthcare programmes that aimed to improve access to early community-based interventions that provided contemporary clinical interventions and self-management support of people with musculoskeletal conditions e the Mobility Action Programme' [57] . An additional $44 million (New Zealand $) was allocated to address access issues to joint replacement surgery [58] . The aim of the Mobility Action Programme is to trial, evaluate and commission effective and sustainable programmes for broader dissemination across NZ in the future. Why a co-design approach was needed in New Zealand for an OA Model of Service Delivery Despite these investments, a national framework to align the health system with best practice recommendations for musculoskeletal conditions does not exist prompting a call to action for an OA MoC for NZ [59] . Furthermore, there is currently no guidance for health service delivery for decision-makers, such as planners, coordinators or funders, about which interventions for OA offer the greatest perceived value in the NZ health system. For OA, this decision can be particularly challenging given that there are many interventions to choose or recommend in a national-level service model, and because implementing recommended OA care is typically complex and influenced by many interdependent barriers and facilitators across the health system [12, 60] . For these reasons, adopting the principle of co-design with stakeholders from across the sector in reform efforts is essential, including the perspectives of people with a lived experience of the condition and vulnerable groups, to ensure appropriate consideration of context' and fit' [18, 36] . Strong evidence points towards incorporating context, that is, the environmental conditions which influence the barriers and enablers of implementation [61] ) into the decision to adopt or commission an intervention for implementation [12, 60] . In particular, establishing the fit' of established or emerging interventions within the NZ context could help to enhance implementation of OA care by more closely aligning intervention performance with what stakeholders want. Alignment of recommendations for OA care will potentially reduce healthcare waste [36] . For example, interventions that align closely with decision-makers' decisionmaking criteria, such as intervention cost, accessibility and effectiveness, and evidence about interventions' performances on these criteria could enhance implementation efforts and better align with system policy priorities. Developing national recommendations for OA care is a complex endeavour and should ideally represent the views and opinions of the people most relevant to OA care in a particular context. In NZ, this context includes not only people across the community living with OA, but also specifically M aori healthcare advocates. They need to work in tandem with healthcare providers, policy-makers and OA research and clinical experts working in the various care settings. However, these eclectic stakeholders typically make complex decisions involving many considerations, or criteria, which often compete. Weighing up these different criteria to reach a decision should ideally occur through a transparent, trustworthy and fair process. Approaches for reaching consensus include, for example, verbal agreement, Delphi surveys, Nominal Group Technique and consensus development panels (e.g. deliberative dialogues) [36] . Some limitations of these methods include: (1) decision-making criteria may not be explicit and decisions may be made without appropriate time for reflection; (2) decision-makers' preferences or values are typically implicit; (3) new evidence, ideas or alternative choices may invalidate previously reached consensus and (4) engagement can be limited, particularly among those with a lived experience of a health condition. Multi-criteria decision analysis (MCDA) is a systematic, transparent and fair approach to decision-making that can address these important considerations [62] . MCDA structures decision-making by incorporating subjective and objective data in a systematic and transparent process that identifies and weighs multiple evaluation criteria in order to prioritise different healthcare interventions, policy options or alternatives [63] . This structured, systematic approach is a defining characteristic of MCDA and helps to overcome mental shortcuts (often employed in complex decisions, e.g. gut feeling') which can lead to systematic mistakes, poor decisions, and ultimately, poor decision-making credibility [64] . The advantages of MCDA include: i) explicit evaluation criteria enforces transparency, accountability and fairness; ii) scalability e the ability to prioritise new or emerging interventions without capturing stakeholders' preferences for these interventions each time and iii) efficiencies in design and deployment streamline decision-making allow for broader and more meaningful engagement with a diverse range of stakeholders. In recent years, MCDA has become widespread in healthcare research [65, 66] . For example, it has been used to explore the preferences of people with OA concerning physical activity [67] , patients' preferences for the use of medicines [36] , healthcare providers' treatment choices for people with OA [68] and policy-makers' and clinical decision-makers' preferences for intervention choice [69] . It has not been applied previously to inform a cross-sector, consensusbased MoSD for people with OA. How has MCDA been applied in the NZ context for OA care? Through a qualitative study in 2016e2017, multidisciplinary and cross-sectoral stakeholders in NZ (people with the lived experience of OA, healthcare providers, policymakers and OA clinical and research experts) identified nine criteria for selecting or recommending OA interventions in the NZ public health system: accessibility, active versus passive interventions, appropriateness, cost, duration, effectiveness, quality of evidence, recommendation and risk of harm [70] . Criteria were organised according to the guidance for MCDA [71] , for example, selecting nonredundant and non-overlapping criteria. The criteria were then categorised into levels' describing their performance. For example, the criterion effectiveness' was categorised into high, moderate and low levels of performance using the standardised mean difference. Choicebased surveys were used to quantify people's preferences for the criteria, that is, their relative weights. Interventions were then rated on the performance levels of the criteria, sourced from clinical guidelines [72] , local data and a nationally representative panel of experts in OA management in NZ. The final step involved combining the preference weights and intervention ratings together to calculate a total performance score for each intervention. Digital and electronic health solutions Digital health systems now offer unprecedented capabilities to health systems and consumers in data collection, delivery of information and access to health services. Access is enhanced through realtime access to care (e.g. through telehealth) and digitally based tailored care (e.g. through adaptive mHealth platforms). The healthcare opportunities offered by digital systems and the ubiquitous use of digital platforms globally, such as mobile phones, rationalise digital health systems as a key strategy for health system strengthening [73] . These technologies have appeal, particularly for younger people [74] , and also provide opportunities to close care disparity gaps that exist due to geography and socioeconomic circumstance, and allow for electronic recording of care access and delivery over time. While there has been an uptake in telehealth and mHealth solutions for some chronic conditions in the past decade, including opportunities for musculoskeletal and pain care [75] , system-wide adoption in musculoskeletal care outside hospitals has been slow, despite promising opportunities. Many reasons can be attributable to the slow uptake, in particular the major gap between innovation and testing and appropriate scale-up into systems [76] . There is an opportunity to close innovation-adoption gaps by better integrating digital solutions into the design of MoCs. In the case of telehealth, one reason is the belief that physical clinical assessment is paramount to diagnosing and monitoring a musculoskeletal condition. Perhaps this will change following the COVID-19 pandemic, which forced clinicians to adopt these tools as part of routine care. In the case of electronic medical recording, the required allocation of significant resources in settings (out of hospital acute care) that have traditionally not been seen as important is limiting uptake. However, these systems can add value to better utilisation of clinical time, ease of recording of PRMs and greatly assist in evaluation efforts [77] . How well are models of care accepted in health systems and their services? It has long been accepted and expected that a health system uses structures and processes to create an integrated care environment that is appropriate for the population it serves [78, 79] . MoCs, when developed as described in this paper, have been a fundamental means of enabling this to happen in some jurisdictions and care settings [80, 81] . For example, national health policies for non- Findings from this activity could be used to inform recommendations in a national MoSD for OA, which outlines those interventions that offer the greatest perceived value to NZ stakeholders. The MCDA process enabled the views and perspectives of all stakeholder groups, particularly people living with OA and M aori advocates, to be respected and equally considered. The development, implementation and evaluation of MoCs for musculoskeletal conditions requires equal partnerships between those with lived experience of the disease/condition and their carers, health professionals across all disciplines, service resource personnel, researchers and policy-makers in jurisdictions. Enhanced decision-making methods, such as multi-criteria decision analysis, can be used to inform more robust and trustworthy health policy decision-making through broader and more inclusive engagement of people with lived experience; this could help policy-makers identify better value-based care options. There is an urgent need for further uptake of digital technologies to support implementation of MoCs. communicable diseases refer to the need to develop and implement MoCs to drive health system strengthening [82] . The National Health Service in the United Kingdom is a good example where MoCs have been the main drivers of change including in the development of strategy to turn attention to value-based healthcare [83, 84] . Acceptability of MoCs by stakeholders from across the health system in Australia was validated in a large qualitative study [25] . Informants identified the value of MoCs in translating evidence to policy and practice and supporting system-wide health transformation. Implementing models of care to support value-based care When MoCs are developed as described in this paper and a quality improvement cycle is used, such as an established framework for evaluation [18] , they can provide clear evidence for health systems and policy-makers when making decisions regarding equitable use of resources that will optimise health system outcomes across the quadruple aim for value-based care. Low back pain, identified as the single greatest contributor to the global burden of disability since 1990 [1] represents an important focus for health systems to realign to deliver value-based care. Currently, health systems deliver too much low-value care and too little high-value care for low back pain. Recent reviews have identified key challenges for health systems in delivery of high-value care for low back pain and pain care in general [33, 34, 85, 86] . These include the financial interests of pharmaceutical and other companies; inflexible payment systems that favour medical care over patients' self-management; and deep-rooted biomedical traditions and beliefs about pain among physicians and the community at large. Authors have argued for system-level reform strategies, such as the implementation of MoCs, to shift resources from unnecessary, low-to high-value care and that such endeavours could be cost-neutral and have widespread impact. Evidence is building concerning whether MoCs can support value-based care. Health systems are now using MoCs to inform strategy concerning value-based care [87, 88] . For example, musculoskeletal MoCs for people living with osteoarthritis and those experiencing fragility fractures are included in the suite of services for value-based care initiatives in Australia [89] , while in Canada, a national approach to hip fracture care has been developed [90] . The New South Wales health system in Australia is now into the fourth year of formally implementing value-based care, with MoCs remaining at the forefront of decision-making on each tranche of implementation [91, 92] . Multidisciplinary team-based care as an enabler to implementing musculoskeletal models of care Healthcare transformation, designed to improve access and quality of care while containing cost, is a worldwide priority [93e95], aligned with value-based care and enabled through MoCs. Many countries have responded by enabling existing healthcare professionals to work to their maximum scope (advanced scope of practice [96e101], which has also been articulated as an enabler to implementing MoCs [102] . Historically, this approach has worked to address shortages in available healthcare practitioners in remote and rural areas and on the front line to triage injured soldiers during wartime. More recently, advanced practice roles have been implemented as part of new interprofessional models of team-based musculoskeletal care. These innovative MoCs require close collaboration and communication among healthcare providers, integration across care sectors (private/ public, hospital/primary/community based) and funding models that enable and promote evidencebased care across the full continuum of care [103] . While people with musculoskeletal conditions access a variety of medical and surgical specialties, there is a need for other non-medical health professionals to be involved in order to access high-value care; for example, supporting the person's understanding of and addressing issues, such as psychological needs, co-morbidities, weight loss and physical activity in osteoarthritis care. Nurses and allied health professionals, such as physiotherapists, dieticians and others, are key members of a true multidisciplinary musculoskeletal care team. Not surprisingly, the high cost and volume of people, who require improved access to musculoskeletal care in the primary care sector, has resulted in the emergence of the new inter-professional service models inclusive of health professionals with advanced scope of practice skills such as nurse practitioners and physiotherapists who have had advanced training in musculoskeletal healthcare [98,100,104e108] . As demand for musculoskeletal health services increase, MoCs will increasingly recommend alternate and innovative workforce models to ensure timely access to care and high-value service delivery. In high-income settings, these examples of new cadres who are educated and authorised to function autonomously and collaboratively in advanced and extended clinical roles may help to achieve some of the quadruple aims of value-based care. These may include reducing wait times in emergency departments, triaging to surgical consult for total knee or hip joint replacement, re-fracture prevention assessments and investigation, and performing as the lead health professional in supporting people presenting with acute low back pain [109e121]. Ongoing evaluation of clinical, economic and patient experience outcomes will be important to maintain momentum in optimising workforce configurations. In lower resourced settings, building capacity among appropriately skilled and trained community health workers will be important to implementing MoCs and avoiding catastrophic out of pocket expenditure for citizens, such as integrated care services for older people [122] and communitybased spine care [123] . An important aspect of value-based care and involvement of multidisciplinary teams is health professional experience. To understand their experience, there is a real need to develop a standardised way of measuring elements that are meaningful to health professionals in the delivery of care. An example is the National Health Service in the UK that could be developed for use across jurisdictional borders. See at: https://www.nhsstaffsurveys.com/Caches/Files/ST19_Core%20questionnaire_FINAL_ 20190705.pdf. As the acceptance of MoCs as levers for system reform becomes more widespread, there will be an increasing need for implementation support within health systems and sharing of experiences. Implementation support can occur at different levels: from local support for an MoSD, to sub-national, to national support for system wide implementation efforts, through to global-level support for multinational implementation. Along this continuum, the level and focus of support may vary from comprehensive local support (e.g. organisational site visits) through to principles or guiding actions for countries to work towards and self-evaluate. Local and sub-national implementation support initiatives typically involve assisting organisations across a health system to implement an MoC through an operational-level MoSD, usually adapted to the local context. For example, in New South Wales, Australia since 2009, there has been increasing support for implementation of several MoCs for the healthcare needs of people with musculoskeletal conditions, including osteoarthritis, secondary fragility fracture prevention, hip fracture care, acute low back pain, and children and adolescents living with rheumatologic conditions. This has been achieved initially through a clinical network working with government in supporting local organisations to develop business cases for implementing the MoCs and the provision of seed funds to enable pilot implementation initiatives with common evaluation frameworks. Implementation scale-up across the There is an urgent need to develop a tool that measures health professional experience across the domains of job satisfaction, burnout, how adverse events are handled, how engagement up and down the hierarchy occurs, their ability to provide care that incorporates all the impacting issues that a person presents for care is experiencing across biopsychosocial areas, and their capacity to influence change within the health service. Funding and implementation of team-based MoCs that allow for local adaptation in rural and remote as well as urban areas that can be scaled and spread are essential. Ongoing evaluation of advanced practice nursing and allied health professional MoCs will be important to maintain and optimise workforce configurations. system was achieved through integration of the MoCs for osteoarthritis and secondary fragility fracture prevention within a larger whole-of-system reform initiative e the 'Leading Better Value Care' programme: https://www.health.nsw.gov.au/Value/lbvc/Pages/default.aspx [89] . The South West England MoCs support network is an example of an online community of practice formed to support implementation of MoCs across primary care in the South West of England and beyond (https://modelsofcare.co.uk/). Multiple other sub-national implementation support programmes also likely exist, although currently no repository exists to share implementation experiences. International efforts to support the implementation of MoCs and MoSDs across countries focus on specific service models or offer guidance that is transferable across conditions. Examples of specific service models include: The Global Fragility Fracture Network (https://www.fragilityfracturenetwork.org/) supports implementation of best practice and localised MoCs for people with fragility fractures across the continuum of care through formal education opportunities and peer mentoring. This includes efforts for health professionals working with the patient cohort at presentation with fracture to peri-operative care, to rehabilitation and to secondary fracture prevention. The Good Life with osteoArthritis in Denmark (GLA:D®) (https://www.glaid.dk/english.html), now implemented in Denmark, Canada, China and Australia, with further countries joining (Switzerland, New Zealand and Austria) [124] . The MoSD provides specific implementation guidance for physiotherapist-led exercise and education for people with hip and/or knee osteoarthritis. The International Osteoporosis Foundation Capture the Fracture® programme (https://www. capturethefracture.org/) [125] facilitates the implementation of coordinated, multi-disciplinary service models for secondary fragility fracture prevention. The programme offers multiple implementation resources to support countries implement the programme and evaluate the scale of implementation achieved (https://www.capturethefracture.org/resources). The Global Spine Care Initiative (https://www.globalspinecareinitiative.org/) [123] supports the implementation of local spine care services in low-and middle-income countries. It is based on eight principles that consider implementation from the micro to macro contexts. The clinical and health economic outcomes of the model are yet to be established. A framework (the 'Framework'; Fig. 2 ) to support implementation of any musculoskeletal MoC was developed in 2016, empirically derived with input from 93 stakeholders across 30 countries [126] . The framework guides those tasked with implementation in a health system to consider and evaluate the following domains: -Implementation readiness -Best practice approaches to support implementation -Evaluation. The framework is now endorsed by 54 peak international organisations and has been used internationally to support development, implementation and evaluation of MoCs (see Fig. 2 ). The majority of public-facing MoCs for musculoskeletal conditions have been developed and supported for implementation in high-income countries. While there are some initiatives occurring in low-and middle-income countries [127, 128] , there remains a need to support development and implementation of musculoskeletal MoCs in low-and middle-income countries that supports, rather than threatens, fragile health systems [129, 130] . Recent research, for example, has confirmed the suitability of the Chronic Care Model for low-and middle-income settings, but identified that some adaptation and expansion is required for low-resource settings [131] . The WHO Integrated Care for Older People (ICOPE) model supports countries at all stages of maturity to consider actions required to realign health systems towards the needs of older people, including their mobility and musculoskeletal health [122] . Implementation tools are now available to support the implementation of ICOPE internationally in health services and health systems [132] . Systematic reviews have reported a range of factors that have been identified as barriers and enablers to implementation of MoCs in health services and health systems [12,133e135] . As outlined in the framework (Fig. 2) , consideration of these factors and others that are relevant to the local context are essential in approaching any implementation effort. System-level MoCs and their operational-level MoSDs are one of many tools that support the translation of evidence into system (macro)-level (e.g. policy), service (meso)-level (e.g. programme implementation) and clinical (micro)-level (e.g. practice) changes [14] . However, all too often evidence translation initiatives end with short-term and non-recurrent resourcing, resulting in multiple shortterm trial reforms, programmes or pilots. These then often lead to reform fatigue among those tasked with implementation and monitoring [137] . On this background, appropriate evaluation of MoCs is an essential component of supporting long-term implementation and sustained reform and quality improvements efforts in health systems. Local system evaluation is critical [138] , recognising that outcomes between settings may not necessarily be comparable; for example, between high-and lowincome economies, or even at the sub-national level between jurisdictions with geographic differences that can impede access to services and/or expert services. Evaluation of MoCs must be pragmatic, flexible to a dynamic health system, respectful of local contextual issues and meaningful to intended end users. The parameters of evaluation should be codesigned with decision-makers and end users to ensure the outcomes are meaningful, useable and contemporary [139] . The perspectives of people with lived experience of a health condition are also critical to ensure meaningful concepts are measured [36] . Evaluation approaches need to consider design and methods, target levels of the health system and outcomes. While 'effectiveness' evaluation (research) remains essential to advancing health innovation, identifying high-value care and minimising health waste, this mode of evaluation may be less relevant and feasible at the stage of implementing MoCs in health systems. By definition, the components of an MoC should be evidence based [14] ; suggesting that evaluation of effectiveness is less of a priority for the downstream evidence translation phase of implementation. The necessary structured and rigid design of gold standard effectiveness research designs, such as the randomised controlled trial (RCT), may collide with the dynamic nature of health systems and health services and inadequately reflect outcomes of the broader population health state. In particular, RCTs may often exclude people with multi-morbid health states, which now reflect the norm rather than a subgroup [140] . Researchers are It is timely to now consider multi-morbidity in Models of Care (MoCs), given the prevalence of multi-morbidity of non-communicable diseases with musculoskeletal conditions commonly being prevalent. Evolution of future MoCs needs to more explicitly consider multi-morbidity and how condition-specific or multi-morbidity MoCs can support delivery of high-value care. While there are some examples in recent years to support the development and implementation of some musculoskeletal MoCs in low-and middle-income countries, for example, fragility fracture and spine care, there is a dire need to adapt and support implementation of MoC in a manner that is suitable for fragile health systems. More research is required concerning health and economic outcomes achievable through implementation of MoCs in order to drive further health system improvements globally. The approach proposed by Jessup and colleagues is a good starting point [136] . starting to apply more innovative trial designs to deal with this challenge and focus specifically on implementation trial designs [141] , although more experience and work is required to apply such methods across services or across a system. The incompatibility between RCTs and health systems research is particularly relevant in the context of MoCs with a strong eHealth component [142] , where evaluation approaches other than effectiveness designs are recommended and supported by guiding frameworks [76,143e146] . These evolving frameworks could feasibly be applied beyond eHealth, with many of the guiding principles already reflected in a framework developed to specifically guide evaluation of musculoskeletal MoCs [126] . Collectively, the framework advocates for continuous cycles of mixed-methods evaluation (or formative evaluations), aligned with a process evaluation approach to iteratively understand how implementation could be optimised in a given context and be responsive to changing circumstances [147] , before initiating a summative (impact) evaluation. The framework also suggests that evaluation should not be based on single outcomes, but consider a multidimensional approach to defining 'success', 'performance' or 'benefit', achieved through mixed-methods approaches that consider outcomes relevant to the consumer (e.g. PROMs and PREMs) and the health system [126, 145] . The importance of emphasising qualitative research exploring stakeholders' perceptions and attitudes towards implementation feasibility, acceptability and sustainability is widely proposed [36, 148] . Evaluation of MoCs or downstream MoSDs can be targeted at different levels of the health system. An evaluation hierarchy, or pyramid, has been proposed, which suggests evaluation can be targeted at one or more of three levels (see Fig. 3 ) [14] : 1) specific components of an MoC or MoSD (e.g. a specific clinical behaviour, work cadre or self-management strategy); 2) at the programme level (e.g. where a specific health improvement programme is implemented, such as the GLA:D® programme [124] or Capture the Fracture® initiative [125] ) or 3) at the whole-of-system level (e.g. the system wide impact of implementing an MoC or multiple service models across a whole system such as the WHO ICOPE approach [122] ). Most implementation and evaluation efforts occur at the base of the pyramid, while the least occurs at the system level [149, 150] , likely reflecting the challenges associated with whole-of-system evaluation endeavours. Evaluation at the system level, however, remains of critical importance and underscores the need for appropriate health surveillance infrastructure and systems [33, 82, 122, 151] , particularly in low-and middle-income countries [130] . As implementation of MoCs evolve and evaluation systems become more sophisticated, the need for a pyramid inversion will become greater. Indeed, many jurisdictions are now emphasising the need to reorient evaluation towards a whole-ofsystem lens in order to build a better picture of overall system functioning and performance against reform targets, inclusive of an approach that integrates patient, clinician and system performance outcomes [89, 152] . While system-and service-level integration of PROMs and PREMs is challenging, as identified in a recent systematic review of barriers to implementation [153] , recent data from New South Wales, Australia, point to the feasibility of measuring PROMS across a system though electronic platforms [154] . In order to achieve integrated measurement of patient and clinical outcomes (micro level), service-level (meso) outcomes and system-level (macro) outcomes, co-design with end users of the evaluation (typically policy-makers, health administrators/mangers and funders) is needed on a background of a lens to healthcare planning and delivery that prioritises 'value' over 'volume' [89, 139] . Infrastructure and governance to enable consistent and systematic measurement is essential and enabled through registries to capture PROMs and PREMS, agreed performance indicators for health services [155, 156] and linked data systems [89] . In the context of MoCs specifically, the recent evaluation framework guides measurement of 'success' of a musculoskeletal MoC in a health system and recommends a range of outcome domains should be considered (Fig. 2) [18] . This paper has revealed that in the past decade, many positive influences have supported the concept of utilising MoCs to support value-based musculoskeletal care. The evidence is clear that the development, implementation and evaluation of MoCs must rely more on the involvement of those with the lived experience. Their involvement must be in collaboration with those who provide care, their managers and funders. Collectively, the advice from those intimately involved whether through personal experience of musculoskeletal diseases or conditions, or clinical practice, or research of the conditions, or through management and funding leads to all elements of the quadruple aim being achieved, as described by Porter in 2010 [19] . However, challenges remain that hinder widespread implementation in many areas of the globe, with many being directly attributable to some specific embedded practices [85,157e159] . Fig. 4 summarises challenges commonly experienced at the various levels of the health system. For MoCs to be even more successful in guiding clinical practice global strategies such as Choosing Wisely need to be encouraged and supported by governments internationally [160e162]. In low-to middle-income countries, there is a policy swing that now acknowledges the contribution from non-communicable diseases to the burden on population health [163] . For example, osteoporotic fractures in Asia are predicted to be higher than seen elsewhere in the next decade [164] . Future MoCs for healthcare will need to be incorporated into government policy concerning housing, education and employment. The momentum for such change is evidenced by the recent US document encouraging the addition of social care to all healthcare considerations [165] . Evaluation of MoCs is a critical enabler to supporting sustainable implementation and resourcing of MoCs. Shifting from a reliance on effectiveness' evaluations to evaluation approaches that better align with multiple domains relevant to implementation is important. Outcomes should be meaningful and useable to intended end users and decision-makers, informed through purposive co-design. Evaluation at the system level, rather than at the programme level, may better support implementation at scale. In summary MoCs are 'adopting evidence-based clinical pathways and protocols, aligning incentives, effectively managing resource, continuously monitoring and improving performance, and investing in supporting information technologies' [166] . Their use is to encouraged more and more across the globe. This paper was developed without specific funding for any of the authors. The authors declare no conflicts of interest. 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