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Background Approaches from systems science are increasingly being trialed in public health because the drivers of poor health are complex, unpredictable and difficult to disentangle. While a broad range of methods is available to study systems science, one method alone is often insufficient for evaluation, as each offer only a limited perspective. Yet, few examples exist showing how several methods can be pragmatically integrated to generate new and meaningful insights, which is vital within systems changes. This paper describes, exemplifies and discusses the Integrated Methods for Public Health action Tracking (IMPAcT) process, which integrates group model building, Causal Loop Diagramming (CLD), the Action Scales Model (ASM), an Action Registry (AR) and Ripple Effects Mapping (REM), to better understand and address complexity within public health interventions. Methods We used common approaches for understanding system organization and interconnections (e.g. through CLD), identifying places to intervene in the system (e.g. ASM), tracking actions implemented within the system (e.g. REM) and understanding the impact at individual level of actions. We illustrate how the IMPAcT process can be applied via a case from a Danish project, the Healthy Active Children Study. Results We present a development process, that combines the above-mentioned approaches, to capture the behaviour, and allow tracking and evaluation of a system following several intervention efforts. Integrating complementary, participatory methods enabled a formative evaluation process that supported continuous learning, adaptation and improvement across complex systems. In the IMPAcT process, methods served both as evaluation tools and as means of stakeholder engagement and knowledge co-production. Embedding reflection and dialogue allowed stakeholders to examine practice and shape next steps. Visuals and narratives enhanced the clarity and impact of the evaluation. Conclusions The new process supports both those working at the front-line of systems change efforts, but also researchers, municipality staff and none the least, policymakers.

Background Preventive health checks are assumed to reduce the risk of the development of cardio-metabolic disease in the long term. Although no solid evidence of effect is shown on health checks targeting the general population, studies suggest positive effects if health checks target people or groups identified at risk of disease. The aim of this study is to explore why and how targeted preventive health checks work, for whom they work, and under which circumstances they can be expected to work. Methods The study is designed as a realist synthesis that consists of four phases, each including collection and analysis of empirical data: 1) Literature search of systematic reviews and meta-analysis, 2) Interviews with key-stakeholders, 3) Literature search of qualitative studies and grey literature, and 4) Workshops with key stakeholders and end-users. Through the iterative analysis we identified the interrelationship between contexts, mechanisms, and outcomes to develop a program theory encompassing hypotheses about targeted preventive health checks. Results Based on an iterative analysis of the data material, we developed a final program theory consisting of seven themes; Target group; Recruitment and participation; The encounter between professional and participants; Follow-up activities; Implementation and operation; Shared understanding of the intervention; and Unintended side effects. Overall, the data material showed that targeted preventive health checks need to be accessible, recognizable, and relevant for the participants’ everyday lives as well as meaningful to the professionals involved. The results showed that identifying a target group, that both benefit from attending and have the resources to participate pose a challenge for targeted preventive health check interventions. This challenge illustrates the importance of designing the recruitment and intervention activities according to the target groups particular life situation. Conclusion The results indicate that a one-size-fits-all model of targeted preventive health checks should be abandoned, and that intervention activities and implementation depend on for whom and under which circumstances the intervention is initiated. Based on the results we suggest that future initiatives conduct thorough needs assessment as the basis for decisions about where and how the preventive health checks are implemented.

Abstract Introduction: Several evaluations of lifestyle interventions for childhood obesity exist; however, follow-up beyond 2 years is necessary to validate the effect. The aim of the present study was to investigate long-term weight development following children participating in one of two pragmatic family-centered lifestyle interventions treating childhood obesity. Methods: This real-life observational study included Danish children 4–17 years of age classified as having obesity. Data from 2010 to 2020, from two community-based family-centered lifestyle interventions (designated hereafter as the Aarhus- and the Randers-intervention) were merged with national registers and routine health check-ups, including height and weight. Adjusted mixed effect models were used to model changes in body mass index (BMI) z score. We performed exploratory analyses of the development in BMI z-score within stratified subgroups of children treated in the interventions before investigating potential effect modifications induced by sex, age, family structure, socioeconomic, or immigration status. Results: With a median follow-up of 2.8 years (interquartile range: 1.3; 4.8), 703 children participated in an intervention (445 the Aarhus-intervention; 258 the Randers-intervention) and 2,337 children were not invited to participate (no-intervention). Children in both interventions experienced a comparable reduction in BMI z-scores during the first 6 months compared to the no-intervention group (Aarhus-intervention: −0.12 SD/year and Randers-intervention: −0.25 SD/year). Only children in the Randers-intervention reduced their BMI z-score throughout follow-up (Aarhus-intervention vs. no-intervention: 0.01 SD/year; confidence interval [CI]: −0.01; 0.04; Randers-intervention vs. no-intervention: −0.05 SD/year; CI: −0.08; −0.02). In subgroup comparisons, combining the two interventions, family income below the median (−0.05 SD/year, CI: −0.02; −0.09), immigrant background (0.04 SD/year, CI: 0.00; 0.07), or receiving intervention less than 1 year (0.04 SD/year, CI: 0.00; 0.08) were associated with a yearly increase in BMI z score. In addition, effect modification analyses did not observe any interaction by sex, age, family structure, socioeconomic, or immigration. Conclusions: Although the more dynamic intervention with longer duration obtained and sustained a minor reduction in BMI z score, the clinical impact may only be modest and still not effective enough to induce a long-term beneficial development in BMI in children with obesity.

Improving childhood health is complex due to the multifactorial nature and interaction of determinants. Complex problems call for complex intervention thinking, and simple one-size-fits-all solutions do not work to improve childhood health. Early awareness is important, as behavior in childhood often is manifested across adolescence and into adulthood. To facilitate shared understanding of the complex structures and relationships that determine children's health behavior, participatory system approaches in, for example, local communities have shown promising potential. However, such approaches are not used systematically within public health in Denmark, and before being rolled out, they should be tested for their feasibility within this context. This paper describes the study design for Children's Cooperation Denmark (Child-COOP) feasibility study that is aiming to examine the feasibility and acceptability of the participatory system approach and the study procedures for a future scale-up controlled trial. The feasibility study is designed as a process evaluation of the intervention with the use of both qualitative and quantitative methods. A local childhood health profile will provide data for childhood health issues, for example, daily physical activity behavior, sleep patterns, anthropometry, mental health, screen use, parental support, and leisure-time activities. Data at system level are collected to assess development in the community, for example, readiness to change, analysis of social networks with stakeholders, rippled effects mapping, and changes in system map. The setting is a small rural town in Denmark, Havndal, with children as the primary target group. Group model building, a participatory system dynamics method, will be used to engage the community, create consensus on the drivers of childhood health, identify local opportunities, and develop context-specific actions. The Child-COOP feasibility study will test the participatory system dynamics approach for intervention and evaluation design and survey objective measures of childhood health behavior and well-being among the ~100 children (6-13 years) attending the local primary school. Community-level data will also be collected. We will assess the contextual factors, implementation of interventions, and mechanisms of impact as part of a process evaluation. Data will be collected at baseline, at 2 years, and 4 years of follow-up. Ethical approval for this study was sought and granted from the Danish Scientific Ethical Committee (1-10-72-283-21). s: The potential of this participatory system dynamics approach includes opportunities for community engagement and local capacity building to improve children's health and health behavior, and this feasibility study holds the potential to prepare an upscaling of the intervention for effectiveness testing. DERR1-10.2196/43949.

Background Children’s health is generally considered a complex interplay between multiple factors. Interventions building on community-based participatory research and system dynamics have shown promising potential in improving children's health behavior and well-being. This presentation aims to present how physical literacy can be used to guide and evaluate a systemic approach to health promotion. Methods System dynamics techniques such as group model building, is used to engage a whole community in a rural area of Denmark and develop local actions for enhancing among other physical activity. A central health outcome in The Child-COOP Denmark study is physical literacy, which is measured by using DAPL (the Danish version of CAPL). Physical literacy will be used as a central element to guide and evaluate the project. The evaluation design includes repeated measures of childhood health behavior, physical literacy and well-being among 100 children (6-13 y) attending the local primary school. With data collection at baseline and at 2 and 4 years of follow up. Results Furthermore, physical literacy results throughout the project period will also be used to guide new local actions in the environment aiming to enhance the local children’s health, well-being and physical activity. Discussion The potential of using physical literacy measures to guide and evaluate a participatory systems approach in order to solve complex health problems, is discussed and debated with the audience.

Background: Kindergartens can potentially contribute substantially to the daily level of physical activity and development of motor skills and might be an ideal setting for improving these as a public health initiative. We aimed to examine whether children from rural outdoor kindergartens had a lower risk of motor difficulties than children from urban conventional kindergartens. Methods: Motor test results were measured during the first school year by school health nurses using a six-item test of gross- and fine motor skills (jumping, handle a writing tool, cutting with a scissor following a line, one-leg stand on each leg, throwing and grabbing). Register-based information was available on potential confounding factors. Results: We included 901 children from outdoor kindergartens and 993 from conventional kindergartens with a mean (SD) age of 6.5 years (0.4). The children from the two types of kindergarten differed according to demographic information, with outdoor kindergarten children more often being from more affluent families (long maternal education level: 47.5% vs. 31.0%, p < 0.0001) and fewer girls attending the outdoor kindergartens (42.7% vs. 49.5%, p = 0.003). In the adjusted models, we found no evidence of differences in the risk of motor difficulties between children attending either type of kindergarten (OR: 0.95, 95%CI: 0.71; 1.27, p = 0.72). Conclusion: Our results do not support outdoor kindergartens as a potential intervention to improve motor abilities among children. Randomized controlled trials are needed to confirm these findings.

The mTOR (mammalian target of rapamycin) signal transduction pathway integrates various signals, regulating ribosome biogenesis and protein synthesis as a function of available energy and amino acids, and assuring an appropriate coupling of cellular proliferation with increases in cell size. In addition, recent evidence has pointed to an interplay between the mTOR and p53 pathways. We investigated the genetic variability of 67 key genes in the mTOR pathway and in genes of the p53 pathway which interact with mTOR. We tested the association of 1,084 tagging SNPs with prostate cancer risk in a study of 815 prostate cancer cases and 1,266 controls nested within the European Prospective Investigation into Cancer and Nutrition (EPIC). We chose the SNPs (n = 11) with the strongest association with risk (p<0.01) and sought to replicate their association in an additional series of 838 prostate cancer cases and 943 controls from EPIC. In the joint analysis of first and second phase two SNPs of the PRKCI gene showed an association with risk of prostate cancer (OR(allele) = 0.85, 95% CI 0.78-0.94, p = 1.3 x 10⁻³ for rs546950 and OR(allele) = 0.84, 95% CI 0.76-0.93, p = 5.6 x 10⁻⁴ for rs4955720). We confirmed this in a meta-analysis using as replication set the data from the second phase of our study jointly with the first phase of the Cancer Genetic Markers of Susceptibility (CGEMS) project. In conclusion, we found an association with prostate cancer risk for two SNPs belonging to PRKCI, a gene which is frequently overexpressed in various neoplasms, including prostate cancer.

The aim of DANARREST is to collect data on processes of care and outcomes for patients with in-hospital cardiac arrest in Denmark, and thereby facilitate and monitor quality and quality improvement initiatives. In-hospital cardiac arrest patients with a clinical indication for cardiopulmonary resuscitation in Denmark. DANARREST includes a number of descriptive variables as well as seven quality of care indicators; four related to processes of care and three related to clinical outcomes. The four process measures are related to whether the cardiac arrest was witnessed, whether the cardiac arrest was ECG-monitored, the timing of cardiopulmonary resuscitation, and the timing of the first rhythm analysis. The three outcomes measures include return of spontaneous circulation, 30-day survival, and 1-year survival. DANARREST started in 2013, and the coverage has increased steadily since. As of 2017, 95% of relevant hospitals are reporting data with an estimated coverage rate of approximately 80%. DANARREST is a relatively new national registry of in-hospital cardiac arrests in Denmark, with a high coverage rate. The registry provides an opportunity to monitor and improve quality of care for patients with in-hospital cardiac arrest.