Developing Age-Friendly Cities: an Evidence-Based Evaluation Tool

Development of Four-Item Attitudes toward People Living with Dementia Scale for population surveys

BACKGROUND

This study developed a short version of a scale measuring attitudes toward people living with dementia, the Four-Item Attitudes toward People Living with Dementia Scale (APDS4), that could be included in a large population survey.

METHODS

We used three datasets from Japan: a web panel survey, a community-based mail survey, and data from a randomised controlled trial on dementia education. The original scale used was the Attitudes toward People Living with Dementia Scale developed by Kim and Kuroda. Test-retest reliability and item response theory analyses were used to reduce the number of items. The reliability, internal consistency, validity, and responsiveness of the short version were evaluated.

RESULTS

Six items with low test-retest reliability and four items with low discrimination parameters were removed from the 14-item scale. The APDS4, consisting of four items, had test-retest reliability and internal consistency comparable to those of the original scale. Confirmatory factor analysis indicated that the APDS4 fit a unidimensional model. The validity of the APDS4 was confirmed by significant associations between the APDS4 scores and the original scale scores, knowledge of dementia, helping behaviour intentions toward people living with dementia, helping behaviour experience, attending the Dementia Supporter Training Course, and engagement in healthcare jobs. In a randomised controlled trial dataset, the APDS4 was more responsive to educational interventions than the original scale.

CONCLUSION

The shortened APDS4 was established as a reliable, validated, and responsive scale. This scale can be used efficiently in population surveys to evaluate dementia-friendly initiatives at the community level.

The impact of transport, housing, and urban development interventions on older adults' mobility: A systematic review of experimental and quasi-experimental studies

Background

Age-friendly cities and communities aim to enhance and preserve the functional abilities of older adults. This systematic review assesses the impact of interventions in transportation, housing, and urban development on the mobility of older adults.

Methods

We systematically searched MEDLINE, Embase, CINAHL, Scopus, PsycINFO, and SocINDEX up to July 2022 to identify studies that evaluated the impact of transportation, housing, and urban development interventions on older adults' mobility. Only randomised controlled trials and quasi-experimental studies with control groups were included to establish a causal relationship between interventions and mobility outcomes.

Findings

We included a total of 15 studies, of which six were randomised controlled trials. Included studies were conducted in high-income settings and employed diverse metrics to assess mobility outcomes. Among housing interventions, three studies examined the impact of assistive technology within home environments for frail older adults. Two of these interventions maintained functional status without improvement, while the third showed a significant decline in outcomes, with the control group faring even worse. Public transport interventions, focused on enhancing mobility through educational initiatives and policy revisions, consistently produced positive outcomes. Interventions related to driving training for older adults, including in-class and on-road assessments, demonstrated beneficial effects. Results from studies evaluating urban design interventions were more varied, with some enhancing mobility by making public spaces more accessible for older adults and others yielding mixed results following infrastructure changes.

Interpretation

Interventions in the built environments of older adults, specifically targeting transportation, housing and urban development, have the potential to enhance mobility and related outcomes according to rigorously designed quantitative evaluations. Due to heterogeneity in how mobility is conceptualised in the literature, greater harmonisation in measurement of mobility would help us understand how the social and built environment contribute to maintaining and improving mobility in older adults.

Funding

World Health Organization.

Construction and improvement strategies of an age-friendly evaluation system for public spaces in affordable housing communities: a case study of Shenzhen

Characterized by early construction periods, as the concentration of low-income populations and a high level of aging, affordable housing communities face prominent challenges such as incongruence between age-friendly construction and the needs of the older adult population. It is urgent to provide pathways and tools for identifying age-friendly issues and optimizing the built environment. The systematic evaluation of age-friendly communities serves as the foundation for implementing intervention measures by developers. Therefore, the construction of a scientifically systematic evaluation system becomes an objective necessity for age-friendly community development. Building upon existing research, this study systematically outlines the subjects, processes, methods, and content involved in constructing an age-friendly community evaluation system. By the methods such as factor analysis and analytical hierarchy process (AHP), the study focuses on the public spaces of affordable housing communities in Shenzhen as a case for constructing an age-friendly evaluation system. The empirical validation of the indicator system is conducted, and the application results are resulted into concrete improvement recommendations and action items, aiming to provide a practical, quantitative tool for community age-friendliness evaluation. The study reveals that adhering to an effective evaluation process, exploring collaborations among multiple stakeholders, determining hierarchical evaluation criteria, and adopting diversified evaluation methods are key to constructing an age-friendly evaluation system for communities. Additionally, the specificity of the evaluation system is influenced by regional demographic structures, policy backgrounds, and the built environment.

Universities as Intermediary Organizations: Catalyzing the Construction of an Age-Friendly City in Hong Kong

Background and Objectives

The construction of an Age-Friendly City (AFC) requires active contribution from relevant interest groups including older adults, nonprofit organizations, and policy-makers. However, given that relevant interest groups may have limited resources, knowledge, and skills, as well as unique contextual factors, they often require help from intermediary organizations-actors that aim to build interest groups' capabilities. Our objectives were to examine the functions of universities, as an example of intermediary organizations, in facilitating the construction of an AFC, and identify critical factors that enable intermediary organizations to perform their functions.

Research Design and Methods

We conducted three focus groups and one individual interview with multiple interest groups including older adults and social workers from nonprofit organizations and local government involved in a 6-year citywide AFC project in Hong Kong. Participants were asked to share their views on the role of universities in relation to their own experiences and roles in the project. Data generated from the interviews were analyzed using thematic analysis.

Results

Four themes pertinent to the functions of universities in facilitating development were identified: facilitating cross-sector collaborations, knowledge diffusion, interest-group building, and mediating divergent interests. We also found that neutrality and reputability are key characteristics for intermediary organizations to wield sufficient legitimacy to perform their functions efficiently.

Discussion and Implications

Findings underscore the important yet overlooked role of intermediary organizations in bridging and mediating different interest groups to facilitate AFC development. We advance gerontological scholarship by providing insights into the theoretical mechanisms and practice implications for intermediary organizations in fostering an AFC.

Evaluating a partnership model of hospice enabled dementia care: A three-phased monitoring, focus group and interview study

BACKGROUND

People with dementia and their caregivers often lack equitable access to hospice care which is a concern internationally. Domains of best practice in palliative care for this population exist and hospices are urged to become dementia friendly.

AIM

This study aimed to evaluate the model of 'Hospice Enabled Dementia Partnership' mapped to international domains of best practice.

DESIGN

Three-phased monitoring, group interview and individual interview study using a formative evaluation framework.

SETTINGPARTICIPANTS

The partnership model was a collaboration between a large specialist palliative care hospice, a dementia charity and a Health Care Trust in the United Kingdom. Service documents were subjected to documentary review of monitoring activity and key indicators of service success. Group interviews and individual interviews took place with family carers (n = 12), health care professionals involved in delivering the service (n = 32) and senior professionals (n = 5) responsible for service commissioning in palliative or dementia care.

RESULTS

One hundred people with dementia were referred to the service between May 2016 and December 2017. Thirty-eight of the 42 people who died, achieved their preferred place of care and died at home. Four themes were derived from the data 'Impact of Dementia', 'Value of the Service', 'Information and Learning Needs' and 'Working in Partnership'.

CONCLUSIONS

Positive outcomes resulted from this best practice model; achievement of preferred place of care and death at home, dual benefits of therapies for patients and families and partnership in cross working and learning between services. Replication of this model should be considered internationally.

A suite of evaluation resources for Dementia Friendly Communities: Development and guidance for use

Objectives

In the context of a growing number of dementia friendly communities (DFCs) globally, a need remains for robust evaluation, and for tools to capture relevant evidence. This paper reports the development of a suite of evaluation resources for DFCs through a national study in England.

Methods

Fieldwork took place in six diverse case study sites across England. A mixed methods design was adopted that entailed documentary analysis, focus groups, interviews, observations, and a survey. Participants were people affected by dementia and practice-based stakeholders. A national stakeholder workshop was held to obtain input beyond the research sites. A workshop at the end of the study served to check the resonance of the findings and emerging outputs with stakeholders from the case study DFCs.

Results

The study had three key outputs for the evaluation of DFCs: First, an evaluation framework that highlights thematic areas to be considered in evaluating DFCs. Second, a Theory of Change that presents inputs into a DFC and short, medium and longer term outcomes. Third, a matrix for assessing a DFC’s degree of maturity, which enables a sense of the kinds of outcomes a DFC might realistically aspire to. These three outputs form a suite of interlinking and complementary evaluation resources for DFCs.

Conclusions

The study has contributed evidence-based resources for monitoring and evaluation that complement existing frameworks. They can be applied to arrive at a detailed assessment of how well a DFC works for people affected by dementia, and at insights into the underlying factors that can guide future policy and practice.

Dementia-friendly communities: The involvement of people living with dementia

BACKGROUND

Dementia Friendly Communities (DFCs) offer an approach to community engagement to improve the lives of people living with dementia and their family supporters. The involvement of those living with dementia is key to creating successful DFCs. This paper examines how people affected by dementia were involved in developing and designing DFCs in England, and the impact of their involvement.

METHODS

This study used a mixed method case study design in six DFCs in England. Data collection involved documentary analysis, a survey, and interviews and focus groups with service providers and people living with dementia and their supporters.

FINDINGS

All six DFCs aspired to involve people living with dementia and their family supporters, but often relied on a small number of people living with dementia. The range of involvement activities in DFCs included Steering Group meetings, wider public consultations, and enabling feedback through data collection methods such as surveys and 'ad hoc' conversations. Organisations within the DFCs with experience of public consultation offered structured opportunities for involvement. There was no evidence of people living with dementia initiating or co-leading the organisation, its direction and/or the activities of the DFCs.

CONCLUSION

The involvement of people living with dementia in DFCs went beyond rhetoric, with some evidence of context sensitive and meaningful participation. Approaches towards involvement should focus on involvement in strategic planning, and on harnessing expertise in delivering different involvement activities to optimise participation of a greater breadth of people living with dementia. Engagement with local organisations who work with, and for, people living with dementia, and dedicating the resources needed for involvement work, are crucial for creating DFCs. The success of DFCs are determined by how the needs of people living with dementia are identified, discussed and reviewed by those within the community who are most affected.

The association between perceived social and physical environment and mental health among older adults: mediating effects of loneliness

Objectives: Despite growing interest in the impact of physical and social environment on mental health, data are lacking on the potential mediating effects of loneliness. We examined it in the association of several social and physical environmental characteristics with mental health among older adults in three municipalities in Flanders (Belgium).Methods: A total of 869 people aged 60 and over were interviewed. Loneliness was assessed through the De Jong Gierveld short scales for emotional and social loneliness. Social participation and social cohesion were assessed following the Neighborhood scales whereas physical environment characteristics were selected from the Neighborhood Environment Walkability Scale. Mental health was assessed through subscale psychological frailty of the Comprehensive Frailty Assessment Instrument plus (CFAI-plus). Linear regression models, including mediation analysis, were used to analyze the survey data.Results: After adjusting for individual characteristics, physical and social environment factors were significantly related to mental health with the significant mediation of emotional and social loneliness. Percentages mediated by both dimensions together were 61% for social cohesion, 43% for social participation, 35% for safety and 25% for mobility. Compared with social loneliness, emotional loneliness was a stronger mediating factor, particularly for mobility and safety. No significant associations between traffic density or basic service availability and mental health were found.Discussion: Improving the social and physical environment might result in a reduction in the prevalence of loneliness and in consequent improvement of mental health among older adults. Special attention should be paid to different types of loneliness.

Measurement Indicators of Age-Friendly Communities: Findings from the AARP Age-Friendly Community Survey

BACKGROUND AND OBJECTIVES

Cities and counties worldwide have adopted the concept of "age-friendly communities." These communities aspire to promote older adults' well-being by providing a safe, affordable built environment and a social environment that encourages their participation. A major limitation in this field is the lack of valid and reliable measures that capture the complex dimensionality and dynamic nature of the aging-environment interface.

RESEARCH DESIGN AND METHODS

This study uses data from the AARP 2016 Age-Friendly Community Surveys (N=3,652 adults ages 65 and older). The survey includes 62 indicators of age-friendliness, e g., outdoor spaces, transportation, housing, social participation, and community and health services. We randomly split the sample into two equal subsamples for confirmatory factor analysis (CFA) and structural equation modeling (SEM).

RESULTS

CFA results indicated that both the five-factor model and the second-order factor model adequately fit the data. In the SEM five-factor model, outdoor space (β=.134; p=.017), social participation (β=.307; p<.001), and community and health services (β=-.149; p=.008) were associated with self-rated health, the outcome of interest. The path coefficients of housing and transportation were not significant. In the second-order factor model, people who lived in more age-friendly communities reported better self-rated health (β=.295; p<.001).

DISCUSSION AND IMPLICATIONS

Our findings show that the Age-Friendly Community Survey measures demonstrate reliability and concurrent validity. To promote older adults' well-being, practitioners, policymakers, and researchers should focus on improving their built and social environments. They can use these measures for short- and long-term planning, monitoring, and evaluating age-friendly community initiatives.

Physical Environment vs. Social Environment: What Factors of Age-Friendliness Predict Subjective Well-Being in Men and Women?

“Age-Friendly Cities and Communities” is an initiative launched by the WHO in 2007 that has spread to more than 1000 cities and communities around the world. This initiative is based on an integrated physical and social environment for older people, and a model of participatory, collaborative governance. An enabling social environment setting is just as important as material conditions in determining well-being in later life. The objective of this study is to analyze the interaction between age-friendliness (physical and social) and subjective well-being in women and men aged 55 and over in the Basque Country. The methodology was based on a survey of a representative sample (n = 2469 individuals). In order to know the predictive power of age-friendliness over subjective well-being, linear regression models separated by gender were constructed. The predictive models of age-friendliness are composed by different variables for men and women. In both cases, the physical environment variables do not remain in the final model. Among the predictors of well-being in men, the coexistence stands out as a safety and support network. In women, the neighborhood has proved to be a very important resource. The conclusions of this study contribute to literature and interventions promoting more effective strategies that enhance older people well-being, considering the gender perspective.

Developing Age-Friendly Cities and Communities: Eleven Case Studies from around the World

Developing age-friendly cities and communities has become a key part of policies aimed at improving the quality of life of older people in urban areas. The World Health Organization has been especially important in driving the ‘age-friendly’ agenda, notably through its Global Network of Age-Friendly Cities and Communities, connecting 1114 (2020 figure) cities and communities worldwide. Despite the expansion and achievements of the Network over the last decade, little is known about the progress made by cities developing this work around the world. This article addresses this research gap by comparing the experience of eleven cities located in eleven countries. Using a multiple case study approach, the study explores the key goals, achievements, and challenges faced by local age-friendly programs and identifies four priorities the age-friendly movement should consider to further its development: (1) changing the perception of older age; (2) involving key actors in age-friendly efforts; (3) responding to the (diverse) needs of older people; and (4) improving the planning and delivery of age-friendly programs. The article concludes by discussing the research and policy implications of these findings for the age-friendly movement.

How is Respect and Social Inclusion Conceptualised by Older Adults in an Aspiring Age-Friendly City? A Photovoice Study in the North-West of England

The World Health Organisation (WHO) Global Age-Friendly Cities (AFC) Guide classifies key characteristics of an AFC according to eight domains. Whilst much age-friendly practice and research have focused on domains of the physical environment, those related to the social environment have received less attention. Using a Photovoice methodology within a Community-Based Participatory Research approach, our study draws on photographs, interviews and focus groups among 26 older Liverpool residents (60+ years) to explore how the city promotes respect and social inclusion (a core WHO AFC domain). Being involved in this photovoice study allowed older adults across four contrasting neighbourhoods to communicate their perspectives directly to Liverpool’s policymakers, service providers and third sector organisations. This paper provides novel insights into how: (i) respect and social inclusion are shaped by aspects of both physical and social environment, and (ii) the accessibility, affordability and sociability of physical spaces and wider social processes (e.g., neighbourhood fragmentation) contributed to or hindered participants’ health, wellbeing, intergenerational relationships and feelings of inclusion and connection. Our findings suggest that respect and social inclusion are relevant across all eight domains of the WHO AFC Guide. It is core to an AFC and should be reflected in both city-based policies and evaluations.

Prisons, Older People, and Age-Friendly Cities and Communities: Towards an Inclusive Approach

This original and ground-breaking interdisciplinary article brings together perspectives from gerontology, criminology, penology, and social policy to explore critically the nature and consequences of the lack of visibility of prisons, prisoners, and ex-prisoners within global research, policy and practice on age-friendly cities and communities (AFCC), at a time when increasing numbers of people are ageing in prison settings in many countries. In addition, the COVID-19 pandemic continues to pose challenges in the contexts both of older peoples' lives, wellbeing, and health, and also within prison settings, and thus it is timely to reflect on the links between older people, prisons, and cities, at a time of ongoing change. Just as there is an extensive body of ongoing research exploring age-friendly cities and communities, there is extensive published research on older people's experiences of imprisonment, and a growing body of research on ageing in the prison setting. However, these two research and policy fields have evolved largely independently and separately, leading to a lack of visibility of prisons and prisoners within AFCC research and policy and, similarly, the omission of consideration of the relevance of AFCC research and policy to older prisoners and ex-prisoners. Existing checklists and tools for assessing and measuring the age-friendliness of cities and communities may be of limited relevance in the context of prisons and prisoners. This article identifies the potential for integration and for cross-disciplinary research in this context, concluding with recommendations for developing inclusive research, policies, and evaluation frameworks which recognise and include prisons and older prisoners, both during and after incarceration.

Environmental and Psychosocial Interventions in Age-Friendly Communities and Active Ageing: A Systematic Review

Background: The academic literature contains little information regarding the interventions that create age-friendly cities and communities in order to promote active ageing. Objectives: A systematic review was carried out to determine the available empirical evidence in relation to the characteristics, content and effectiveness of interventions aimed at improving environmental and psychosocial risk factors for older people, from the perspective of age-friendly communities and the promotion of active ageing. Methods: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, the studies retained in this review were identified through a systematic search of the academic literature in selected electronic databases including Web of Science and Scopus. Independent critical appraisal and data extraction were conducted by two reviewers. The checklist was used to assess the quality of the articles. Findings: The search identified 1020 potentially eligible documents, of which 11 satisfied the established criteria. Non-exhaustive practices prevailed over rigorous investigations, with a high proportion of studies observed to be of low methodological quality and at high risk of bias. This reflected the predominance of uncontrolled interventions. Environmental interventions were focused on reducing risk and adapting the everyday environmental setting, while psychosocial interventions prioritised social strategies (behavioural changes, promotion of participation) and training. Interventions were more effective in certain domains of age-friendly cities and communities such as transportation and housing, followed by increased participation as a lifestyle-related behavioural change. The inferred changes were associated with providing information and enhancing skills; modifying access, barriers, exposures, and opportunities; enhancing services and support; continuity and effectiveness of changes over time; and modifying policies based on the bottom-up approach of age-friendly cities and communities (AFCC). Discussion and conclusion: Interventions focused on personal and organisational aspects might have positive effects in the longer term. However, fewer changes would be observed in interventions revolving around changing lifestyles owing to the impact of complex multi-causal factors. The relative effectiveness in terms of health calls into question the design of interventions and the supposed "friendliness" of certain communities. There is a need to encourage sound longitudinal research aimed at providing key knowledge for the implementation and evaluation of public policies, and to encourage age-friendly community programmes to promote active ageing.

Digitalising the Age-Friendly City: Insights from Participatory Action Research

The World Health Organization’s age-friendly city initiative emerged as a response to the intersecting global trends of population ageing and urbanisation. However, a third global trend—digitalisation—has largely been overlooked in research and policy making relating to age-friendly cities and communities. Within the context of a general shift towards online civic participatory activities, this article explores older adults’ digital citizenship in an age-friendly city in the North of England. Drawing on interviews, observations and field notes from design workshops as part of an ongoing participatory action research project, we consider two key questions. First, how does an age-friendly city stakeholder organisation of older adults make use of digital technologies in order to provide digital information and communications? Second, what is the potential of digital audio to increase civic participation in later life and local engagement with age-friendly issues? Our analysis focuses on two domains of the World Health Organization’s age-friendly city framework: Communication and information and civic participation. First, we report on the stakeholder organisation’s efforts to re-design their digital newsletter in order to provide information and communications to older residents about local work on ageing projects. We then outline the organisation’s efforts, in a public setting, to engage with digital audio as a way to increase the participation of older residents with age-friendly topics. We conclude by suggesting the need to re-frame the role of digital technologies within the age-friendly city, broadening the scope from accessibility towards enhancing digital citizenship opportunities.

How Older People Experience the Age-Friendliness of Their City: Development of the Age-Friendly Cities and Communities Questionnaire

The World Health Organization engages cities and communities all over the world in becoming age-friendly. There is a need for assessing the age-friendliness of cities and communities by means of a transparently constructed and validated tool which measures the construct as a whole. The aim of this study was to develop a questionnaire measuring age-friendliness, providing full transparency and reproducibility. The development and validation of the Age Friendly Cities and Communities Questionnaire (AFCCQ) followed the criteria of the COnsensus-based Standards for selection of health Measurement INstruments (COSMIN). Four phases were followed: (1) development of the conceptual model, themes and items; (2) initial (qualitative) validation; (3) psychometric validation, and (4) translating the instrument using the forward-backward translation method. This rigorous process of development and validation resulted in a valid, psychometrically sound, comprehensive 23-item questionnaire. This questionnaire can be used to measure older people’s experiences regarding the eight domains of the WHO Age-Friendly Cities model, and an additional financial domain. The AFCCQ allows practitioners and researchers to capture the age-friendliness of a city or community in a numerical fashion, which helps monitor the age-friendliness and the potential impact of policies or social programmes. The AFCCQ was created in Dutch and translated into British-English.

Evaluation of an Age-Friendly City and Its Effect on Life Satisfaction: A Two-Stage Study

Due to the ageing of the world's population, age-friendly cities are emerging to promote active ageing by optimising opportunities for health, participation and safety, in order to improve the quality of life of older people. Despite initiatives in different countries, there is a lack of empirical research exploring their impact on older people. The objective of this study is to evaluate an age-friendly city by analysing its relationship with life satisfaction, taking into account the age cohort variables of the elderly and whether they live alone or with someone else. A two-stage study, in which 66 subjects participated in the qualitative analysis (focus groups) in Stage I and 203 of the quantitative analysis (survey methodology) or Stage II. Despite the differences found in the different groups of elderly persons, for all of them the domains of outdoor spaces and buildings, and community support and health services, are significantly related to life satisfaction, with the latter showing itself to be a predictor of such satisfaction. It is important to take into account the different groups of elderly persons, so as to be able to establish suitable specific actions. This study aims to make a contribution to the development of public policies that influence the life satisfaction of the elderly.

What is the impact on health and wellbeing of interventions that foster respect and social inclusion in community-residing older adults? A systematic review of quantitative and qualitative studies

BACKGROUND

Many interventions have been developed to promote respect and social inclusion among older people, but the evidence on their impacts on health has not been synthesised. This systematic review aims to appraise the state of the evidence across the quantitative and qualitative literature.

METHODS

Eligible studies published between 1990 and 2015 were identified by scanning seven bibliographic databases using a pre-piloted strategy, searching grey literature and contacting experts. Studies were included if they assessed the impact (quantitatively) and/or perceived impact (qualitatively) of an intervention promoting respect and social inclusion on the physical or mental health of community-residing people aged 60 years and older. Titles and abstracts were screened for eligibility by one reviewer. A second reviewer independently screened a 10% random sample. Full texts were screened for eligibility by one reviewer, with verification by another reviewer. Risk of bias was assessed using standardised tools. Findings were summarised using narrative synthesis, harvest plots and logic models to depict the potential pathways to health outcomes.

RESULTS

Of the 27,354 records retrieved, 40 studies (23 quantitative, 6 qualitative, 11 mixed methods) were included. All studies were conducted in high and upper middle-income countries. Interventions involved mentoring, intergenerational and multi-activity programmes, dancing, music and singing, art and culture and information-communication technology. Most studies (n = 24) were at high or moderate risk of bias. Music and singing, intergenerational interventions, art and culture and multi-activity interventions were associated with an overall positive impact on health outcomes. This included depression (n = 3), wellbeing (n = 3), subjective health (n = 2), quality of life (n = 2), perceived stress and mental health (n = 2) and physical health (n = 2). Qualitative studies offered explanations for mediating factors (e.g. improved self-esteem) that may lead to improved health outcomes and contributed to the assessment of causation.

CONCLUSIONS

Whilst this review suggests that some interventions may positively impact on the health outcomes of older people, and identified mediating factors to health outcomes, the evidence is based on studies with heterogeneous methodologies. Many of the interventions were delivered as projects to selected groups, raising important questions about the feasibility of wider implementation and the potential for population-wide benefits.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO registration number CRD42014010107.