Examining school-level implementation of British Columbia, Canada's school food and beverage sales policy: a realist evaluation

Promoting healthy school food environments and nutrition in Canada: a systematic review of interventions, policies, and programs

CONTEXT

The school food environment is a critical interface for child and adolescent nutrition, and there is a need to understand existing literature on Canadian school food environments to identify equity gaps and opportunities, and empower decision-makers to plan for future action.

OBJECTIVE

Literature on Canadian school food and nutrition interventions, policies, programs, and their effects on diets and nutritional status are synthesized and appraised in this systematic review.

DATA SOURCES

A search strategy was developed for each database used (Medline, Embase, PsycINFO, ERIC, Cochrane Collaboration, Canadian Electronic Library, BiblioMap), with a combination of free text and controlled vocabulary, for articles published from 1990 to 2021. Unpublished data and grey literature were also searched.

DATA EXTRACTION

Quantitative and qualitative studies with an observational or intervention study design, reviews, or program evaluations conducted in Canadian schools with participants aged 5-19.9 years were included. Key study characteristics and risk of bias were extracted independently by 2 investigators using a standardized tool.

DATA ANALYSIS

A total of 298 articles were included (n = 192 peer reviewed and 106 from the grey literature), which were mostly conducted in Ontario (n = 52), British Columbia (n = 43), and Nova Scotia (n = 28). Twenty-four interventions, 5 nonevaluated programs, and 1 policy involved Indigenous populations. Overall, 86 articles measured and reported on effectiveness outcomes, including dietary intake; anthropometry; knowledge, attitudes, and practices; and physical activity. The literature remains largely heterogenous and primarily focused on nutrition education programs that use subjective assessments to infer changes in nutrition. A key facilitator to implementation and sustainability was community engagement, whereas key barriers were staff capacity, access to resources and funding, and consistent leadership.

CONCLUSIONS

This review provides insight into Canadian school food and nutrition interventions, programs, and policies and uncovers important evidence gaps that require careful examination for future evaluations. Governments must create supportive environments that optimize nutrition for children and adolescents through equitable policies and programs.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO registration no. CRD42022303255.

Legal and regulatory instruments for NCD prevention: a scoping review and descriptive analysis of evaluations in OECD countries

CONTEXT

Public health law is an important tool in non-communicable disease (NCD) prevention. There are different approaches available for achieving policy objectives, including government, co-, quasi- and self-regulation. However, it is often unclear what legal design features drive successes or failures in particular contexts. This scoping review undertakes a descriptive analysis, exploring the design characteristics of legal instruments that have been used for NCD prevention and implemented and evaluated in OECD countries.

METHODS

A scoping review was conducted across four health and legal databases (Scopus, EMBASE, MEDLINE, HeinOnline), identifying study characteristics, legal characteristics and regulatory approaches, and reported outcomes. Included studies focused on regulation of tobacco, alcohol, unhealthy foods and beverages, and environmental pollutants.

FINDINGS

We identified 111 relevant studies evaluating 126 legal instruments. Evaluation measures most commonly assessed implementation, compliance and changes to the built and lived environment. Few studies evaluated health or economic outcomes. When examining the design and governance mechanisms of the included legal instruments, government regulation was most commonly evaluated (n = 90) and most likely to be reported effective (64%). Self-regulation (n = 27) and quasi-regulation (n = 5) were almost always reported to be ineffective (93% and 100% respectively). There were few co-regulated instruments evaluated (n = 4) with mixed effectiveness. When examining public health risks, food and beverages including alcohol were more likely to be self- or quasi-regulated and reported as ineffective more often. In comparison, tobacco and environmental pollutants were more likely to have government mandated regulation. Many evaluations lacked critical information on regulatory design. Monitoring and enforcement of regulations was inconsistently reported, making it difficult to draw linkages to outcomes and reported effectiveness.

CONCLUSIONS

Food and alcohol regulation has tended to be less successful in part due to the strong reliance on self- and quasi-regulation. More work should be done in understanding how government regulation can be extended to these areas. Public health law evaluations are important for supporting government decision-making but must provide more detail of the design and implementation features of the instruments being evaluated - critical information for policy-makers.

Identifying barriers and facilitators in the development and implementation of government-led food environment policies: a systematic review

CONTEXT

Policy-specific actions to improve food environments will support healthy population diets.

OBJECTIVE

To identify cited barriers and facilitators to food environment policy (FEP) processes reported in the literature, exploring these according to the nature of the policy (voluntary or mandatory) and country development status.

DATA SOURCES

A systematic search was conducted of 10 academic and 7 grey-literature databases, national websites, and manual searches of publication references.

DATA EXTRACTION

Data on government-led FEPs, barriers, and facilitators from key informants were collected.

DATA SYNTHESIS

The constant-comparison approach generated core themes for barriers and facilitators. The appraisal tool developed by Hawker et al. was adopted to determine the quality of qualitative and quantitative studies.

RESULTS

A total of 142 eligible studies were identified. Industry resistance or disincentive was the most cited barrier in policy development. Technical challenges were most frequently a barrier for policy implementation. Frequently cited facilitators included resource availability or maximization, strategies in policy process, and stakeholder partnership or support.

CONCLUSIONS

The findings from this study will strategically inform health-reform stakeholders about key elements of public health policy processes. More evidence is required from countries with human development indices ranging from low to high and on voluntary policies.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO registration no. CRD42018115034.

Evaluation of a Large-Scale School Wellness Intervention Through the Consolidated Framework for Implementation Research (CFIR): Implications for Dissemination and Sustainability

Background

Numerous studies have tested school-based interventions promoting healthy behaviors in youth, but few have integrated dissemination and implementation (D&I) frameworks. Using D&I frameworks can inform if and how an evidence-based intervention is implemented and maintained and provide strategies to address contextual barriers. Such application is necessary to understand how and why interventions are sustained over time. We evaluated a school wellness initiative called SWITCH® (School Wellness Integration Targeting Child Health) to (1) assess implementation outcomes of adoption, fidelity, and penetration, (2) discern implementation determinants through the Consolidated Framework for Implementation Research (CFIR), and (3) examine differences among inexperienced and experienced schools and influential factors to sustainment.

Methods

A total of 52 schools from Iowa, United States enrolled in the 2019-2020 iteration of SWITCH (22 inexperienced; 30 experienced). The CFIR guided the adaptation of mixed methods data collection and analysis protocols for school settings. Specific attention was focused on (1) fidelity to core elements; (2) adoption of best practices; and (3) penetration of behavior change practices. Determinants were investigated through in-depth qualitative interviews and readiness surveys with implementation leaders. A systematic process was used to score CFIR domains (between -2 and +2) indicating positive or negative influence. Independent t-tests were conducted to capture differences between samples, followed by a cross-case analysis to compare determinants data. Inductive coding yielded themes related to sustainment of SWITCH beyond formal implementation support.

Results

Experienced schools had higher scores on fidelity/compliance (t = -1.86 p = 0.07) and adoption (t = -2.03 p = 0.04). CFIR determinants of innovation source, culture, relative priority, and leadership engagement were positive implementation determinants, whereas tension for change and networks and communications were negative determinants. Distinguishing factors between experienced and inexperienced schools were Readiness for Implementation and Self-efficacy (experienced significantly higher; p < 0.05). Strategies to enhance sustainability were increasing student awareness/advocacy, keeping it simple, and integrating into school culture.

Conclusions

Findings provide specific insights related to SWITCH implementation and sustainability but more generalized insights about the type of support needed to help schools implement and sustain school wellness programming. Tailoring implementation support to both inexperienced and experienced settings will ultimately enhance dissemination and sustainability of evidence-based interventions.

Using realist approaches in nutrition and dietetics research

AIM

The aim of this study was to explore the use and future potential of realist approaches to research in nutrition and dietetics.

METHODS

A targeted literature review was used to search key journals (n = 7) in nutrition and dietetics to identify existing research using a realist approach. A narrative synthesis was conducted to explore findings in relation to the research aim.

RESULTS

Nine research papers (four realist evaluations, five realist reviews) describing seven nutrition interventions were found, which revealed the application of realist research in nutrition and dietetics has focused on public health interventions. Realist research provided a deeper, more nuanced understanding of varied outcomes including the role of context, and contributed to the development of theory about how and why interventions work. As a theory-driven research method, realist research was able to assist in overcoming methodological shortcomings to contribute to meaningful, transferable findings.

CONCLUSION

The results highlight the potential contribution of the realist research in nutrition and dietetics to evaluate interventions and inform future practice.