Prevention system mediation of communities that care effects on youth outcomes

The Impact of the Communities that Care Approach in Reducing Violence and Crime Within an Urban, High-Burden Community

Community violence and crime are significant public health problems with serious and lasting effects on young people, families, and communities. This violence and crime have significant ripple effects, affecting not just those who are directly physically injured, but also those who witness violent episodes, those who have friends or loved ones killed or injured, and those who must everyday navigate streets that they know have been frequent sites of serious violence and crime. The current study presents evidence of the impact that a data-driven, collective impact approach - the Communities that Care prevention system - can have on violence and crime outcomes within a large urban, high-burden community. Established as one of the national Youth Violence Prevention Centers (YVPC) funded by the Centers for Disease Control and Prevention, the Chicago Center for Youth Violence Prevention is among the first to implement the CTC approach in a large, urban community. The current study's findings show reductions in violence (i.e., aggravated assaults and robberies) in the Bronzeville community, compared to similar communities in Chicago.

Scoping review of practice-focused resources to support the implementation of place-based approaches

ISSUE ADDRESSED

There is increasing interest across public health research, policy, and practice in place-based approaches to improve health outcomes. Practice-focused resources, such as grey literature, courses and websites, are utilised by practitioners to support the implementation of place-based approaches.

METHODS

A detailed search of two search engines: Google and DuckDuckGo to identify free practice-focused resources was conducted.

RESULTS

Forty-one resources met inclusion criteria, including 26 publications, 13 web-based resources and two courses. They were mainly focused on collaboration, developed by not-for-profit organisations, focused on a broad target audience, and supported people living with disadvantage. The publications we reviewed generally: clearly stated important information, such as the author of the publication; used their own evaluations, professional experience and other grey literature as supporting evidence; included specific, practical implementation strategies; and were easy to read.

CONCLUSIONS

Based on findings, we recommend that: (1) the development of resources to support evidence-informed practice and governance be prioritised; (2) resources clearly state their target audience and tailor communication to this audience; (3) resources draw on evidence from a range of sources; (4) resources continue to include practical implementation strategies supported by examples and (5) resource content be adaptable to different contexts (e.g., different settings and/or target populations). SO WHAT?: This is the first review of practice-focused resources to support the implementation of place-based approaches and the findings can be used to reduce duplication of efforts and inform future research, policy, and practice, particularly the refinement of existing resources and the development of future resources.

Increasing support for the prevention of adverse childhood experiences and substance use: Implementation of narrative change strategies in local health departments

Adverse childhood experiences (ACEs) are potentially traumatic but preventable experiences that occur before the ages of 18, including child abuse, witnessing violence, and parental substance use. ACEs have been linked with increased risk for substance use, along with a variety of other negative health outcomes. However, there is limited evidence of community-level strategies that link ACEs and substance to increase awareness of prevention efforts. This article reports on a $2.9 million program to promote health equity and inform narratives for the prevention of ACEs and substance use within three Midwestern communities. Program partners sought to create new transformational narratives that linked ACEs and substance use, while underscoring the importance of addressing social determinants of health (SDOH) that lead to disparities in ACEs and substance use. A mixed-methods evaluation design included document review, in-depth interviews with program staff (N = 8) and community liaisons (N = 2), and site reports from program staff (N = 8) and their community partners (N = 17). Analyses showed that successful implementation efforts had early leadership buy-in and support, set clear and manageable expectations at the outset of implementation, and developed strong relationships with organizations that engage in health equity work. Training and technical assistance were critical to helping community partners build trust, recognize each other's perspectives, broaden and reframe their world view, and better understand narrative efforts for the primary prevention of ACEs and substance use.

Contextual effects of community capacity as a predictor for adolescent alcohol, tobacco, and illicit drug use: A multi-level analysis

Adolescent substance use is a major public health issue that can result in enduring physical, psychological, and social consequences. This study seeks to examine the relationship between community capacity for prevention and the 4-week prevalence rate of substance use, including tobacco, alcohol, other drugs, and binge-drinking, among students in Germany ranging from grades 5 to 11. This study employed a cross-sectional design and used baseline data from 28 communities participating in the CTC-EFF study. The sample consisted of 7210 students who were surveyed about their substance use behavior. Additionally, 158 local key informants were surveyed on ten capacity domains, which included commitment, knowledge and skills, resources, leadership, inclusiveness, prevention collaboration, sectoral-collaboration, cohesion, problem-solving skills, and needs orientation. Furthermore, a total capacity score was calculated as the mean of the ten capacity domains. To examine the associations between community capacity and substance use behavior, logistic multi-level models were utilized. The analysis shows a negative association between community capacity (total score) and any substance use (OR = 0.28, 95% CI 0.12-0.56). Specifically, higher levels of total community capacity are associated with lower odds of alcohol use (OR = 0.30, 95% CI 0.13-0.80), tobacco use (OR = 0.09, 95% CI 0.01-0.60), and binge-drinking (OR = 0.67, 95% CI (0.46-0.99). Further analyses of distinct community capacity domains indicate that higher levels of sectoral-collaboration (OR = 0.62, 95% CI 0.37-0.97), knowledge and skills (OR = 0.74, 95% CI 0.40-0.79), resources (OR = 0.52, 95% CI 0.36-0.76), and problem-solving skills (OR = 0.71, 95% CI 0.36-0.89) are associated with lower odds of any substance use. The study findings suggest that community capacity is associated with substance use behavior, emphasizing the importance of capacity building in interventions targeting the reduction of substance use among adolescents.

Understanding community- and system-capacity change over time: A close look at changing social capital in Evidence2Success communities

Evidence in majority White and low-population areas suggest that community prevention systems can create social capital that is needed to support high-quality implementation and sustainability of evidence-based programs. This study expands prior work by asking the question: How does community social capital change during the implementation of a community prevention system in low-income, highly populated communities of color? Data were collected from Community Board members and Key Leaders in five communities. Linear mixed effect models analyzed data on reports of social capital over time, first as reported by Community Board members then by Key Leaders. Community Board members reported social capital improved significantly over time during the implementation of the Evidence2Success framework. Key Leader reports did not change significantly over time. These findings suggest that community prevention systems implemented in historically marginalized communities may help communities build social capital that is likely to support the dissemination and sustainability of evidence-based programs.

Community capacity for prevention and health promotion: a scoping review on underlying domains and assessment methods

BACKGROUND

Building community capacity is an essential health promotion approach, which refers to the characteristics of communities that affect their ability to identify and address social and public health problems. Despite general agreement about certain capacity domains and frameworks, there is no comprehensive and consistent assessment of community capacity. Therefore, the aim of this scoping review is to identify the domains and methods used to assess community capacity related to community-based prevention and health promotion.

METHODS

A scoping search was performed on 06/02/2022 via PubMed, Web of Science, and Science Direct, with supplemental searches via Google Scholar. The review included studies published in English from 1990 to 2022 that explicitly described how community capacity was assessed in health promotion and prevention interventions. Furthermore, studies had to meet at least two of the three following criteria for capacity assessment: a theoretical foundation, a participatory approach, or a field test of the assessment tool.

RESULTS

From 4779 records, 38 studies were included after applying exclusion criteria. Nineteen studies used mixed, eleven qualitative and eight quantitative methods to assess community capacity. The various domains used to assess community capacity were identified and reassembled into nine comprehensive domains: community participation, knowledge and skills, resources, leadership, community power, sense of community, collaboration, critical awareness and problem-solving, and community structure. The review also identified four sub-domains, which include commitment, communication, shared values and goals, and sustainability.

DISCUSSION

This scoping review provides an overview of the domains and methods used to assess community capacity, which can facilitate the development of a comprehensive approach to capacity assessment in future research.

[Evidence-based prevention for child and adolescent mental health: the "Communities That Care" (CTC) approach for Germany]

Intersectoral collaboration, evidence base, and sustainable implementation are central challenges in community health promotion. The international prevention system Communities That Care (CTC) addresses these challenges. CTC aims to prevent alcohol and drug abuse, violence, delinquency, school dropout, and depressive symptoms among adolescents with a systemic multi-level strategy. The evidence-based and cost-effective prevention system developed in the USA was adapted to Germany; at present, a replication study evaluates the cost-effectiveness.CTC is based on empirical theory and follows a five-phase process model. Essential for acceptance and evidence-based implementation is the formation of an intersectoral coalition, whose members receive advisory support and training over several years. The actors are empowered to use a system change model at the municipal level and to implement it in the long term. The aim is to select evidence-based measures in a data-driven and needs-oriented manner and to implement them in consideration of the local contextual conditions in order to reduce risk factors, promote protective factors, and thus improve the health of adolescents. Validated instruments such as the CTC Children and Youth Survey and a registry with evidence-based prevention programs ("Grüne Liste Prävention") support the process.As a systemic intervention, CTC integrates existing local structures and agencies and involves them in the entire process through new decision-making and development bodies. In this way, the potential in the municipality is used and, as much as possible, resources are bundled, strengths are developed, and transparency is created.

Initial conditions and functioning over time among community coalitions

Developing operationally strong community coalitions is critical to actualizing their potential for public health improvement. The purpose of this study was to measure how substance use prevention coalitions in Mexico functioned across their first 1.5 years, and to test associations between initial community contextual factors and subsequent coalition functioning and outcomes. Members of 19 coalitions participated in three waves of surveys about coalition context and functioning. We used paired t-tests to assess changes in coalition functioning and outcomes. Regression models estimated associations between coalition functioning and outcomes and initial community context. Among coalition functioning factors, over coalitions' first 1.5 years, member engagement increased, as did coordinator skill and participatory leadership style. Two initial community context factors - community support for prevention and community champions - predicted several measures of process competence, but only community champions predicted perceived community improvement. Thus, community champions may play a pivotal role in later coalition success. The observed increases in member engagement and process competence may support subsequent coalition sustainability, a crucial component to realizing their potential impact on public health.

Study protocol: a non-randomised community trial to evaluate the effectiveness of the communities that care prevention system in Germany

BACKGROUND

The Communities That Care (CTC) prevention planning and implementation system trains communities throughout a five-phase cycle to (1) build capacity for prevention, (2) adopt science-based prevention, (3) assess the prevention needs of adolescents living in the community, (4) select, and (5) implement evidence-based programs according to their needs. After CTC proved to be effective and cost-effective in the U.S., it is being used by an increasing number of communities in Germany. The aim of this study is to evaluate the effectiveness and cost-effectiveness of CTC in Germany.

METHODS

Communities in CTC-phases 1 to 3 (n = 21) and individually-matched comparison communities (n = 21) were recruited for a non-randomised trial. To assess long-term outcomes, (1) a cohort of 5th Grade students will be surveyed biennially concerning behaviours (antisocial behaviour and substance use) and well-being as well as risk and protective factors. Additionally, (2) biennial cross-sectional surveys will be conducted in 6th, 8th, 10th, and 11th Grade in each community. To assess short-term outcomes, a cohort of ten key informants per community will be surveyed biennially concerning adoption of science-based prevention, collaboration, community support and community norms. (4) In a cross-sectional design, all ongoing prevention programs and activities in the communities will be assessed biennially and data will be collected about costs, implementation and other characteristics of the programs and activities. (5) To monitor the CTC implementation, the members of the local CTC-boards will be surveyed annually (cross-sectional design) about team functioning and coalition capacity. Data analysis will include general and generalised mixed models to assess the average treatment effect of CTC. Mediation analyses will be performed to test the logical model, e.g., adoption of science-based prevention as a mediator for the effectiveness of the CTC approach.

DISCUSSION

This is the first controlled study to evaluate the effectiveness of a comprehensive community prevention approach in Germany. Evaluating the effectiveness of CTC in Germany is an important prerequisite for further diffusion of the CTC approach.

TRIAL REGISTRATION

This study was registered with German Clinical Trial Register: DRKS00022819 on Aug 18, 2021.

Community utilization of risk and protective factor data for prevention planning in Chile and Colombia

Many effective community health service delivery systems implemented in the USA assess risk and protective factors (RPFs) for youth problem behaviors in a community, and report these data back to local coalitions for prevention planning. This study examined whether community prevention coalitions in Chile and Colombia perceived these reports of RPFs-based on the results of the Communities That Care Youth Survey-to be understandable, valid, useful, and worth disseminating. Thematic content analysis was used to analyze qualitative data collected from 7 focus groups with 75 coalition members. Results indicated heterogeneity between and within coalitions in terms of participants' understanding of RPFs. However, most participants found reports of RPFs to be easy to understand, thorough, 'true' to their communities, and useful for diagnosing and prioritizing needs, action planning, and mobilizing others in their communities. Findings suggest the viability of preventive systems that rely on community-level RPF data, for use in Latin America.

Power and Sample Size Determination for Multilevel Mediation in Three-Level Cluster-Randomized Trials

Mediation analyses supply a principal lens to probe the pathways through which a treatment acts upon an outcome because they can dismantle and test the core components of treatments and test how these components function as a coordinated system or theory of action. Experimental evaluation of mediation effects in addition to total effects has become increasingly common but literature has developed only limited guidance on how to plan mediation studies with multi-tiered hierarchical or clustered structures. In this study, we provide methods for computing the power to detect mediation effects in three-level cluster-randomized designs that examine individual- (level one), intermediate- (level two) or cluster-level (level three) mediators. We assess the methods using a simulation and provide examples of a three-level clinic-randomized study (individuals nested within therapists nested within clinics) probing an individual-, intermediate- or cluster-level mediator using the R package PowerUpR and its Shiny application.

Long-term Impacts and Benefit-Cost Analysis of the Communities That Care Prevention System at Age 23, 12 Years After Baseline

This study estimated sustained impacts and long-term benefits and costs of the Communities That Care (CTC) prevention system, implemented and evaluated in a longitudinal cluster-randomized trial involving 24 communities in seven states. Analyses utilized reports from a longitudinal panel of 4407 participants, followed since the study's baseline in grade 5, with most recent follow-up 12 years later at age 23. Impacts on lifetime abstinence from primary outcomes of substance use and antisocial behavior were estimated using generalized linear mixed Poisson regression analysis, adjusted for individual and community-level covariates. Possible cascading effects on 4-year college completion, major depressive disorder, and generalized anxiety disorder through age 23 were evaluated as secondary outcomes. CTC had a statistically significant global effect on primary outcomes and also on combined primary and secondary outcomes. Among primary outcomes, point estimates suggested absolute improvements in lifetime abstinence of 3.5 to 6.1% in the intervention arm and relative improvements of 13 to 55%; 95% confidence intervals revealed some uncertainty in estimates. Among secondary outcomes, 4-year college completion was 1.9% greater among young adults from intervention communities, a 20% relative improvement. Mental health outcomes were approximately the same across trial arms. Although CTC had small sustained effects through age 23, benefit-cost analyses indicated CTC was reliably cost beneficial, with a net present value of $7152 (95% credible interval: $1253 to $15,268) per participant from primary impacts and $17,919 ($306 to $39,186) when secondary impacts were also included. It remained cost beneficial even when impacts were adjusted downward due to the involvement of CTC's developer in the trial. Findings suggest that broader dissemination of CTC could improve public health and individual lives in the long term and generate positive net benefits to society.

Scaling up and scaling out: Consilience and the evolution of more nurturing societies

This paper argues that diverse disciplines within the human sciences have converged in identifying the conditions that human beings need to thrive and the programs, policies, and practices that are needed to foster well-being. In the interest of promoting this view, we suggest that this convergence might usefully be labeled "The Nurture Consilience." We review evidence from evolutionary biology, developmental, clinical, and social psychology, as well as public health and prevention science indicating that, for evolutionary reasons, coercive environments promote a "fast" life strategy that favors limited self-regulation, immediate gratification, and early childbearing. However, this trajectory can be prevented through programs, practices, and policies that (a) minimize toxic social and biological conditions, (b) limit opportunities and influences for problem behavior, (c) richly reinforce prosocial behavior, and (d) promote psychological flexibility. The recognition of these facts has prompted research on the adoption, implementation, and maintenance of evidence-based interventions. To fully realize the fruits of this consilience, it is necessary to reform every sector of society. We review evidence that free-market advocacy has promoted the view that if individuals simply pursue their own economic well-being it will benefit everyone, and trace how that view led business, health care, education, criminal justice, and government to adopt practices that have benefited a small segment of the population but harmed the majority. We argue that the first step in reforming each sector of society would be to promote the value of ensuring everyone's well-being. The second step will be to create contingencies that select beneficial practices and minimizes harmful ones.

Aligning dissemination and implementation science with health policies to improve children's mental health

The prevalence of mental health problems among children (ages 0-21) in the United States remains unacceptably high and, post-COVID-19, is expected to increase dramatically. Decades of psychological knowledge about effective treatments should inform the delivery of better services. Dissemination and implementation (D&I) science has been heralded as a solution to the persistent problem of poor quality services and has, to some extent, improved our understanding of the contexts of delivery systems that implement effective practices. However, there are few studies demonstrating clear, population-level impacts of psychological interventions on children. Momentum is growing among communities, cities, states, and some federal agencies to build "health in all policies" to address broad familial, social, and economic factors known to affect children's healthy development and mental health. These health policy initiatives offer a rare opportunity to repurpose D&I science, shifting it from a primary focus on evidence-based practice implementation, to a focus on policy development and implementation to support child and family health and well-being. This shift is critical as states develop policy responses to address the health and mental health impacts of the COVID-19 pandemic on already-vulnerable families. We provide a typology for building research on D&I and children's mental health policy. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Models of Intersectoral Cooperation in Municipal Health Promotion and Prevention: Findings from a Scoping Review

Intersectoral cooperation is regarded as a promising strategy in setting-oriented prevention and health promotion for interdepartmental, joint efforts towards improved health equity. This paper deals with models of intersectoral cooperation in municipal health promotion. It frames the methodology and the central results of a literature and database search (on behalf of the Federal Centre for Health Education, BZgA) and presents the partial results regarding the models of intersectoral cooperation. Of 48 publications analyzed for the review, nine publications each present different models of intersectoral cooperation. The models describe typical processes in the context of the joint work as detailed step sequences and formulate general recommendations as success factors of intersectoral cooperation. With reference to the findings of the review, it can be concluded that models for intersectoral cooperation have not yet been systematized and consequently have not been researched for transferability into specific fields of practice.

Public Health Benefits 16 Years After a Statewide Policy Change: Communities That Care in Pennsylvania

Communities That Care (CTC), an evidence-based prevention system, has been installed outside of a research context in over 500 communities worldwide. Yet, its effectiveness in a non-research context is unknown. Using a repeated cross-sectional design with propensity score weighting at the school district-level, the purpose of this study was to examine the effect of widespread diffusion of CTC across Pennsylvania on adolescent substance use, delinquency, and depression. Anonymous youth survey data were collected from 6th, 8th, 10th, and 12th grade students every other year from 2001 to 2011. Three-hundred eighty-eight school districts participated in one to six waves of data collection during that time, resulting in a total of 470,798 student-reported observations. The intervention school districts received programming provided by CTC coalitions. Outcome measures were lifetime and past 30-day alcohol, tobacco, marijuana, and other drug use. Lifetime and past year participation in delinquency and current depressive symptoms were also analyzed. Analyses revealed that CTC school districts had significantly lower levels of adolescent substance use, delinquency, and depression. This effect was small to moderate, depending on the particular outcome studied. Overall effects became stronger after accounting for use of evidence-based programs; there are likely differences in implementation quality and other factors that contribute to the observed overall small effect size. Future research needs to unpack these factors.

The Impact of Comprehensive Community Initiatives on Population-Level Child, Youth, and Family Outcomes: A Systematic Review

Comprehensive community initiatives (CCIs) represent a popular method for creating systemic change, yet there is a dearth of evidence on their effectiveness (Zaff, Pufall Jones, Donlan, Lin, & Anderson, 2016). This article presents a systematic review of the evidence on the population-level impact of CCIs, focusing specifically on documented effects from studies using an experimental or quasi-experimental design. Of 1,947 articles identified through a database and hand search, 25 articles examining six different CCIs-most of which employed prevention science frameworks-met the review inclusion criteria. The results of this review show that CCIs can strengthen protective factors and reduce risk factors, delay initiation of and reduce substance use, and reduce the likelihood of, and delay engagement in, violent and/or delinquent behaviors. Impacts have been documented as soon as one year after initial intervention, and as early as 7^th grade, with effects sustained as long as seven years post-intervention, and as late as a year post-high school. However, relative to the prevalence of CCIs as a practical intervention, the evidence base is small, potentially dated, and focused on a narrow set of outcomes and populations. Recommendations for interpreting the evidence base are discussed, including methodological limitations and implications for future work.

Croon’s Bias-Corrected Factor Score Path Analysis for Small- to Moderate-Sample Multilevel Structural Equation Models

Maximum likelihood estimation of multilevel structural equation model (MLSEM) parameters is a preferred approach to probe theories involving latent variables in multilevel settings. Although maximum likelihood has many desirable properties, a major limitation is that it often fails to converge and can incur significant bias when implemented in studies with a small to moderate multilevel sample (e.g., fewer than 100 organizations with 10 or less individuals/organization). To address similar limitations in single-level SEM, literature has developed Croon’s bias-corrected factor score path analysis estimator that converges more regularly than maximum likelihood and delivers less biased parameter estimates with small to moderate sample sizes. We derive extensions to this framework for MLSEMs and probe the degree to which the estimator retains these advantages with small to moderate multilevel samples. The estimator emerges as a useful alternative or complement to maximum likelihood because it often outperforms maximum likelihood in small to moderate multilevel samples in terms of convergence, bias, error variance, and power. The proposed estimator is implemented as a function in R using lavaan and is illustrated using a multilevel mediation example.

Evidence for state, community and systems-level prevention strategies to address the opioid crisis

BACKGROUND

Practitioners and policy makers need evidence to facilitate the selection of effective prevention interventions that can address the ongoing opioid overdose epidemic in the United States.

METHODS

We conducted a systematic review of publications reporting on rigorous evaluations of systems-level interventions to address provider and patient/public behavior and prevent prescription and illicit opioid overdose. A total of 251 studies were reviewed. Interventions studied included 1) state legislation and regulation, 2) prescription drug monitoring programs (PDMPs), 3) insurance strategies, 4) clinical guideline implementation, 5) provider education, 6) health system interventions, 7) naloxone education and distribution, 8) safe storage and disposal, 9) public education, 10) community coalitions, and 11) interventions employing public safety and public health collaborations.

RESULTS

The quality of evidence supporting selected interventions was low to moderate. Interventions with the strongest evidence include PDMP and pain clinic legislation, insurance strategies, motivational interviewing in clinical settings, feedback to providers on opioid prescribing behavior, intensive school and family-based programs, and patient education in the clinical setting.

CONCLUSIONS

Although evidence is growing, further high-quality research is needed. Investigators should aim to identify strategies that can prevent overdose, as well as influence public, patient, and provider behavior. Identifying which strategies are most effective at addressing prescription compared to illicit opioid misuse and overdose could be fruitful, as well as investigating synergistic effects and unintended consequences.

Evidence for state, community and systems-level prevention strategies to address the opioid crisis

BACKGROUND

Practitioners and policy makers need evidence to facilitate the selection of effective prevention interventions that can address the ongoing opioid overdose epidemic in the United States.

METHODS

We conducted a systematic review of publications reporting on rigorous evaluations of systems-level interventions to address provider and patient/public behavior and prevent prescription and illicit opioid overdose. A total of 251 studies were reviewed. Interventions studied included 1) state legislation and regulation, 2) prescription drug monitoring programs (PDMPs), 3) insurance strategies, 4) clinical guideline implementation, 5) provider education, 6) health system interventions, 7) naloxone education and distribution, 8) safe storage and disposal, 9) public education, 10) community coalitions, and 11) interventions employing public safety and public health collaborations.

RESULTS

The quality of evidence supporting selected interventions was low to moderate. Interventions with the strongest evidence include PDMP and pain clinic legislation, insurance strategies, motivational interviewing in clinical settings, feedback to providers on opioid prescribing behavior, intensive school and family-based programs, and patient education in the clinical setting.

CONCLUSIONS

Although evidence is growing, further high-quality research is needed. Investigators should aim to identify strategies that can prevent overdose, as well as influence public, patient, and provider behavior. Identifying which strategies are most effective at addressing prescription compared to illicit opioid misuse and overdose could be fruitful, as well as investigating synergistic effects and unintended consequences.

The Neuroscience of Drug Reward and Addiction

Drug consumption is driven by a drug's pharmacological effects, which are experienced as rewarding, and is influenced by genetic, developmental, and psychosocial factors that mediate drug accessibility, norms, and social support systems or lack thereof. The reinforcing effects of drugs mostly depend on dopamine signaling in the nucleus accumbens, and chronic drug exposure triggers glutamatergic-mediated neuroadaptations in dopamine striato-thalamo-cortical (predominantly in prefrontal cortical regions including orbitofrontal cortex and anterior cingulate cortex) and limbic pathways (amygdala and hippocampus) that, in vulnerable individuals, can result in addiction. In parallel, changes in the extended amygdala result in negative emotional states that perpetuate drug taking as an attempt to temporarily alleviate them. Counterintuitively, in the addicted person, the actual drug consumption is associated with an attenuated dopamine increase in brain reward regions, which might contribute to drug-taking behavior to compensate for the difference between the magnitude of the expected reward triggered by the conditioning to drug cues and the actual experience of it. Combined, these effects result in an enhanced motivation to "seek the drug" (energized by dopamine increases triggered by drug cues) and an impaired prefrontal top-down self-regulation that favors compulsive drug-taking against the backdrop of negative emotionality and an enhanced interoceptive awareness of "drug hunger." Treatment interventions intended to reverse these neuroadaptations show promise as therapeutic approaches for addiction.

Stability and Change in Patterns of Adolescent Antisocial Behavior

Research examining relations between various types of antisocial behavior (ASB) have generally been based on cross-sectional data. Although there is a strong correlation between types of ASB, it has been less common to examine how patterns of adolescents’ problems vary over time. This study used a person-oriented approach to examine patterns of ASB in adolescents longitudinally and also investigated how these patterns were associated with three outcomes. The sample consisted of 778 Swedish adolescents in grade 7 (13 years old) followed over time to grade 9. Patterns of ASB were identified based on adolescent-reported tobacco and alcohol use, truancy, bullying in school, and delinquency. The outcomes were drug use, depressive symptoms, and missing grades in grade 9. Results revealed an escalation in the frequency and seriousness of ASB over time, although the largest single cluster over time evidenced no ASB. One cluster in particular increased the risk of drug use, depression, and missing grades at grade 9. Results are discussed in relation to school-based prevention efforts.

Business Sustainability of Start-Ups Based on Government Support: An Empirical Study of Korean Start-Ups

Since the mid-2000s, start-ups have increasingly become the driving force of new jobs and growth engines for advanced countries, and emerging nations are striving to vitalize start-ups through active government support policies. However, approximately 30% of start-ups shut down within two years of their foundation. Accordingly, this study determines the factors affecting the business sustainability of start-ups as based on available government support and provides suggestions to increase the effectiveness of the government-supported projects. This study conducted a survey of 273 start-ups in Korea, and empirically analyzed whether factors such as entrepreneurship, market orientation, and network affected business sustainability by using flow experience and entrepreneurial satisfaction as mediators. The results found that entrepreneurship affected business sustainability with flow experience and entrepreneurial satisfaction as the mediators, while market orientation affected business sustainability using flow experience as the mediator, and network affected business sustainability with entrepreneurial satisfaction as the mediator.

Using Theories of Change to inform implementation of health systems research and innovation: experiences of Future Health Systems consortium partners in Bangladesh, India and Uganda

Background

The Theory of Change (ToC) is a management and evaluation tool supporting critical thinking in the design, implementation and evaluation of development programmes. We document the experience of Future Health Systems (FHS) Consortium research teams in Bangladesh, India and Uganda with using ToC. We seek to understand how and why ToCs were applied and to clarify how they facilitate the implementation of iterative intervention designs and stakeholder engagement in health systems research and strengthening.

Methods

This paper combines literature on ToC, with a summary of reflections by FHS research members on the motivation, development, revision and use of the ToC, as well as on the benefits and challenges of the process. We describe three FHS teams’ experiences along four potential uses of ToCs, namely planning, communication, learning and accountability.

Results

The three teams developed ToCs for planning and evaluation purposes as required for their initial plans for FHS in 2011 and revised them half-way through the project, based on assumptions informed by and adjusted through the teams’ experiences during the previous 2 years of implementation. All teams found that the revised ToCs and their accompanying narratives recognised greater feedback among intervention components and among key stakeholders. The ToC development and revision fostered channels for both internal and external communication, among research team members and with key stakeholders, respectively. The process of revising the ToCs challenged the teams’ initial assumptions based on new evidence and experience. In contrast, the ToCs were only minimally used for accountability purposes.

Conclusions

The ToC development and revision process helped FHS research teams, and occasionally key local stakeholders, to reflect on and make their assumptions and mental models about their respective interventions explicit. Other projects using the ToC should allow time for revising and reflecting upon the ToCs, to recognise and document the adaptive nature of health systems, and to foster the time, space and flexibility that health systems strengthening programmes must have to learn from implementation and stakeholder engagement.

Electronic supplementary material

The online version of this article (doi:10.1186/s12961-017-0272-y) contains supplementary material, which is available to authorized users.

Experimental Power for Indirect Effects in Group-randomized Studies with Group-level Mediators

Mediation analyses have provided a critical platform to assess the validity of theories of action across a wide range of disciplines. Despite widespread interest and development in these analyses, literature guiding the design of mediation studies has been largely unavailable. Like studies focused on the detection of a total or main effect, an important design consideration is the statistical power to detect indirect effects if they exist. Understanding the sensitivity to detect indirect effects is exceptionally important because it directly influences the scale of data collection and ultimately governs the types of evidence group-randomized studies can bring to bear on theories of action. However, unlike studies concerned with the detection of total effects, literature has not established power formulas for detecting multilevel indirect effects in group-randomized designs. In this study, we develop closed-form expressions to estimate the variance of and the power to detect indirect effects in group-randomized studies with a group-level mediator using two-level linear models (i.e., 2-2-1 mediation). The results suggest that when carefully planned, group-randomized designs may frequently be well positioned to detect mediation effects with typical sample sizes. The resulting power formulas are implemented in the R package PowerUpR and the PowerUp!-Mediator software (causalevaluation.org).

"Scaling-out" evidence-based interventions to new populations or new health care delivery systems

BACKGROUND

Implementing treatments and interventions with demonstrated effectiveness is critical for improving patient health outcomes at a reduced cost. When an evidence-based intervention (EBI) is implemented with fidelity in a setting that is very similar to the setting wherein it was previously found to be effective, it is reasonable to anticipate similar benefits of that EBI. However, one goal of implementation science is to expand the use of EBIs as broadly as is feasible and appropriate in order to foster the greatest public health impact. When implementing an EBI in a novel setting, or targeting novel populations, one must consider whether there is sufficient justification that the EBI would have similar benefits to those found in earlier trials.

DISCUSSION

In this paper, we introduce a new concept for implementation called "scaling-out" when EBIs are adapted either to new populations or new delivery systems, or both. Using existing external validity theories and multilevel mediation modeling, we provide a logical framework for determining what new empirical evidence is required for an intervention to retain its evidence-based standard in this new context. The motivating questions are whether scale-out can reasonably be expected to produce population-level effectiveness as found in previous studies, and what additional empirical evaluations would be necessary to test for this short of an entirely new effectiveness trial. We present evaluation options for assessing whether scaling-out results in the ultimate health outcome of interest.

CONCLUSION

In scaling to health or service delivery systems or population/community contexts that are different from the setting where the EBI was originally tested, there are situations where a shorter timeframe of translation is possible. We argue that implementation of an EBI in a moderately different setting or with a different population can sometimes "borrow strength" from evidence of impact in a prior effectiveness trial. The collection of additional empirical data is deemed necessary by the nature and degree of adaptations to the EBI and the context. Our argument in this paper is conceptual, and we propose formal empirical tests of mediational equivalence in a follow-up paper.

Risk and protective profile of tobacco and alcohol use among Iranian adolescents: a population- based study

Background: Identification of risk and protective factors is of great importance in designing preventive and interventional programs. The aim of the present study has been to investigate peer/individual, family, school, and community risk and protective factors as predictors of tobacco and alcohol use among Iranian adolescents.

Methods: In a cross-sectional population-based study, 870 Iranian adolescents aged 15–18 years old, filled out the adopted form of “Communities That Care Youth Survey”. Thirty-two risk and protective factors were entered in adjusted logistic regression analyses to predict the lifetime cigarette and alcohol use.

Results: Sixteen risk and seven protective factors predicted both lifetime cigarette and alcohol use in the bivariate logistic regression analysis. In the multivariate logistic regression analysis 12 risk factors including friends’ use of drugs, interaction with antisocial peers, sensation seeking, intention to use, perceived risks of drug use, family history of drug use, poor family management, parental attitudes favorable toward drug use, family conflict, academic failure, school low commitment, perceived availability of drugs predicted both lifetime cigarette and alcohol use as well as four protective factors including religiosity, self-esteem, family rewards for prosocial involvement, and school rewards for prosocial involvement. The highest OR were related to the risk factor of “Rewards for antisocial involvement” [3.9(1.5–10)], and protective factor of “Religiosity” [0.1(0.1–0.3)].

Conclusion: The present study has produced evidences about risk and protective factors related to adolescents substance use and can help designing and implementing of preventive interventions for maintaining and promoting adolescents health.

An Overview of Research and Evaluation Designs for Dissemination and Implementation

The wide variety of dissemination and implementation designs now being used to evaluate and improve health systems and outcomes warrants review of the scope, features, and limitations of these designs. This article is one product of a design workgroup that was formed in 2013 by the National Institutes of Health to address dissemination and implementation research, and whose members represented diverse methodologic backgrounds, content focus areas, and health sectors. These experts integrated their collective knowledge on dissemination and implementation designs with searches of published evaluations strategies. This article emphasizes randomized and nonrandomized designs for the traditional translational research continuum or pipeline, which builds on existing efficacy and effectiveness trials to examine how one or more evidence-based clinical/prevention interventions are adopted, scaled up, and sustained in community or service delivery systems. We also mention other designs, including hybrid designs that combine effectiveness and implementation research, quality improvement designs for local knowledge, and designs that use simulation modeling.

Evaluation of Community-Level Effects of Communities That Care on Adolescent Drug Use and Delinquency Using a Repeated Cross-Sectional Design

The Communities That Care (CTC) prevention system has shown effects on reducing incidence and prevalence of problem behaviors among a panel of youth followed from 5th through 12th grade. The present report examines whether similar intervention effects could be observed using a repeated cross-sectional design in the same study. Data were from a community-randomized trial of 24 US towns. Cross-sectional samples of sixth, eighth, and tenth graders were surveyed at four waves. Two-stage ANCOVA analyses estimated differences between CTC and control communities in community-level prevalence of problem behaviors for each grade, adjusting for baseline prevalence. No statistically significant reductions in prevalence of problem behaviors were observed at any grade in CTC compared to control communities. Secondary analyses examined intervention effects within a “pseudo cohort” where cross-sectional data were used from sixth graders at baseline and tenth graders 4 years later. When examining effects within the pseudo cohort, CTC compared to control communities showed a significantly slower increase from sixth to tenth grade in lifetime smokeless tobacco use but not for other outcomes. Exploratory analyses showed significantly slower increases in lifetime problem behaviors within the pseudo cohort for CTC communities with high, but not low, prevention program saturation compared to control communities. Although CTC demonstrated effects in a longitudinal panel from the same community-randomized trial, we did not find similar effects on problem behaviors using a repeated cross-sectional design. These differences may be due to a reduced ability to detect effects because of potential cohort effects, accretion of those who were not exposed, and attrition of those who were exposed to CTC programming in the repeated cross-sectional sample.

Primary Health Care: Potential Home for Family-Focused Preventive Interventions

Family-focused prevention programs have been shown to effectively reduce a range of negative behavioral health outcomes but have had limited reach. Three key barriers must be overcome to expand the reach of family-focused prevention programs and thereby achieve a significant public health impact. These barriers are (1) current social norms and perceptions of parenting programs; (2) concerns about the expertise and legitimacy of sponsoring organizations to offer parenting advice; and (3) a paucity of stable, sustainable funding mechanisms. Primary healthcare settings are well positioned to overcome these barriers. Recent changes within health care make primary care settings an increasingly favorable home for family-focused prevention and suggest possibilities for sustainable funding of family-focused prevention programs. This paper discusses the existing advantages of primary care settings and lays out a plan to move toward realizing the potential public health impact of family-focused prevention through widespread implementation in primary healthcare settings.

Beneficial Action within Altruistic and Prosocial Behavior

This article integrates knowledge from health psychology, life course development, and social psychology to outline a theoretical framework for identifying, investigating, promoting, and evaluating beneficial action. Beneficial action is defined as a subset of prosocial (motivated to benefit others that may include self-interest) and altruistic (prosocial motivation without self-interest) behavior that uses consequential (scientific) knowledge to increase freedom within the global population. Beneficial action theory seeks to increase political and social actions that are planned and evaluated to ensure key tasks in human development. Central among these is the broadening of social identity to ensure that the human potential to use science to modify the natural environment achieves benefits for the global population. This article presents a theoretical framework for conceptualizing the psychological processes that underlie the development, application and evaluation of beneficial action for individuals and populations. The need to conceptualize beneficial action arises from 3 related observations. First, the certainty of knowledge of the beneficial outcome of a specific human action increases the moral motivation to engage in that action. For example, there is consensus among psychologists and other professions that it is unethical to engage in therapeutic practices that have evidence for neutral or harmful consequences. Second, due to the rapid increase in scientific knowledge, the range of human action that has scientifically ascertainable consequences is rapidly expanding. Third, advancing scientific knowledge means that human actions have increasingly powerful consequences for humanity and the natural world, warranting careful consideration of how to ensure global population benefits.

Building Local Infrastructure for Community Adoption of Science-Based Prevention: The Role of Coalition Functioning

The widespread adoption of science-based prevention requires local infrastructures for prevention service delivery. Communities That Care (CTC) is a tested prevention service delivery system that enables a local coalition of community stakeholders to use a science-based approach to prevention and improve the behavioral health of young people. This paper uses data from the Community Youth Development Study (CYDS), a community-randomized trial of CTC, to examine the extent to which better internal team functioning of CTC coalitions increases the community-wide adoption of science-based prevention within 12 communities, relative to 12 matched comparison communities. Specifically, this paper examines the potential of both a direct relationship between coalition functioning and the community-wide adoption of science-based prevention and a direct relationship between functioning and the coalition capacities that ultimately enable the adoption of science-based prevention. Findings indicate no evidence of a direct relationship between four dimensions of coalition functioning and the community-wide adoption of a science-based approach to prevention, but suggest a relationship between coalition functioning and coalition capacities (building new member skills and establishing external linkages with existing community organizations) that enable science-based prevention.

Using theory of change to design and evaluate public health interventions: a systematic review

BACKGROUND

Despite the increasing popularity of the theory of change (ToC) approach, little is known about the extent to which ToC has been used in the design and evaluation of public health interventions. This review aims to determine how ToCs have been developed and used in the development and evaluation of public health interventions globally.

METHODS

We searched for papers reporting the use of "theory of change" in the development or evaluation of public health interventions in databases of peer-reviewed journal articles such as Scopus, Pubmed, PsychInfo, grey literature databases, Google and websites of development funders. We included papers of any date, language or study design. Both abstracts and full text papers were double screened. Data were extracted and narratively and quantitatively summarised.

RESULTS

A total of 62 papers were included in the review. Forty-nine (79 %) described the development of ToC, 18 (29 %) described the use of ToC in the development of the intervention and 49 (79 %) described the use of ToC in the evaluation of the intervention. Although a large number of papers were included in the review, their descriptions of the ToC development and use in intervention design and evaluation lacked detail.

CONCLUSIONS

The use of the ToC approach is widespread in the public health literature. Clear reporting of the ToC process and outputs is important to strengthen the body of literature on practical application of ToC in order to develop our understanding of the benefits and advantages of using ToC. We also propose a checklist for reporting on the use of ToC to ensure transparent reporting and recommend that our checklist is used and refined by authors reporting the ToC approach.

Community Prevention Coalition Context and Capacity Assessment: Comparing the United States and Mexico

Effective planning for community health partnerships requires understanding how initial readiness-that is, contextual factors and capacity-influences implementation of activities and programs. This study compares the context and capacity of drug and violence prevention coalitions in Mexico to those in the United States. Measures of coalition context include community problems, community leadership style, and sense of community. Measures of coalition capacity include the existence of collaborative partnerships and coalition champions. The assessment was completed by 195 members of 9 coalitions in Mexico and 139 members of 7 coalitions in the United States. Psychometric analyses indicate the measures have moderate to strong internal consistency, along with good convergent and discriminant validity in both settings. Results indicate that members of Mexican coalitions perceive substantially more serious community problems, especially with respect to education, law enforcement, and access to alcohol and drugs. Compared to respondents in the United States, Mexican respondents perceive sense of community to be weaker and that prevention efforts are not as valued by the population where the coalitions are located. The Mexican coalitions appear to be operating in a substantially more challenging environment for the prevention of violence and substance use. Their ability to manage these challenges will likely play a large role in determining whether they are successful in their prevention efforts. The context and capacity assessment is a valuable tool that coalitions can use in order to identify and address initial barriers to success.

Psychometric properties of the Transitions from Foster Care Key Leader Survey

This study summarizes the development and piloting of the Transitions from Foster Care Key Leader Survey (TFC-KLS), an instrument designed to measure change in systems serving young people transitioning from foster care to adulthood. The Jim Casey Youth Opportunity Initiative's logic model was used as a basis for instrument development. The instrument was piloted with 119 key leaders in six communities. Seven of eight latent scales performed well in psychometric testing. The relationships among the 24 measures of system change were explored. A CFA testing overall model fit was satisfactory following slight modifications. Finally, a test of inter-rater reliability between two raters did not find reliable reporting of service availability in a supplemental portion of the survey. The findings were generally positive and supported the validity and utility of the instrument for measuring system change, following some adaptations. Implications for the field are discussed.

The full translational spectrum of prevention science: facilitating the transfer of knowledge to practices and policies that prevent behavioral health problems

A broad-span, six-stage translational prevention model is presented, extending from the basic sciences-taking a multi-level systems approach, including the neurobiological sciences-through to globalization. The application of a very wide perspective of translation research from basic scientific discovery to international policy change promises to elicit sustainable, population-level reductions in behavioral health disorders. To illustrate the conceptualization and actualization of a program of translational prevention research, we walk through each stage of research to practice and policy using an exemplar, callous-unemotional (CU) traits. Basic science has identified neurobiological, psychophysiological, behavioral, contextual, and experiential differences in this subgroup, and yet, these findings have not been applied to the development of more targeted intervention. As a result, there are currently no programs considered especially effective for CU traits, likely because they do not specifically target underlying mechanisms. To prevent/reduce the prevalence of conduct disorder, it is critical that we transfer existing knowledge to subsequent translational stages, including intervention development, implementation, and scaling. And eventually, once resulting programs have been rigorously evaluated, replicated, and adapted across cultural, ethnic, and gender groups, there is potential to institutionalize them as well as call attention to the special needs of this population. In this paper, we begin to consider what resources and changes in research perspectives are needed to move along this translational spectrum.

Universal Prevention Exposure as a Moderator of the Community Context: Findings from the PROSPER Project

This study examined how participation in a universal family skills-building program may interact with community risks and resources to produce youth outcomes. Prior research has noted community-level variability in risk and protective factors, but thus far no study has examined the role that participation on a community-wide intervention may play in moderating the effects of community risks or resources. The study included 14 communities (seven in Iowa, seven in Pennsylvania) that implemented a family focused evidence-based program as part of the PROSPER project. Community level variables included both risk factors (percent of low income families, the availability of alcohol and tobacco, norms regarding adolescent substance use, incidence of drug-related crimes) and community resources (proactive school leadership, availability of youth-serving organizations, and student involvement in youth activities). The proximal youth and family outcomes included youth perceptions of their parents' management skills, parent-child activities, and family cohesion. Results indicated that the Strengthening Families Program:10-14 may have moderated the impact of the community risks and resources on community-level youth outcomes; risk levels meaningfully associated with community-level change in program participants, though these results varied somewhat by outcome. Generally, higher levels of resources also meaningfully associated with more positive change after participating in the family-focused intervention. These results suggest that the effect of some evidence-based programs may be even stronger in some communities than others; more research in this area is needed.

Reciprocal relations between coalition functioning and the provision of implementation support

Community coalitions have been promoted as a strategy to help overcome challenges to the dissemination and implementation of evidence-based prevention programs. This paper explores the characteristics of coalitions that enable the provision of implementation support for prevention programs in general and for the implementation of evidence-based prevention programs with fidelity. Longitudinal cross-lagged panel models were used to study 74 Communities That Care (CTC) coalitions in Pennsylvania. These analyses provide evidence of a unidirectional influence of coalition functioning on the provision of implementation support. Coalition member knowledge of the CTC model best predicted the coalition's provision of support for evidence-based program implementation with fidelity. Implications for developing and testing innovative methods for delivering training and technical assistance to enhance coalition member knowledge are discussed.

CREATE-ing capacity to take developmental crime prevention to scale: A community-based approach within a national framework

Developmental crime prevention is founded on the long-term outcomes and economic efficiency of about 50 promising or model programs for fostering healthy child and youth development and for preventing crime. However, few if any of these programs have been successfully implemented on a large scale, a problem that is the focus of Type 2 (T2) Translation Research within prevention science. This paper describes one approach to building capacity for population-level community-based developmental prevention using the CREATE model that we developed as an outcome of the Pathways to Prevention Project that operated in a disadvantaged region of Brisbane between 2002 and 2011. CREATE is an acronym: Collaborative; Relationships-driven; Early in the pathway; Accountable; Training-focused; Evidence-driven. CREATE is being used to develop, in T2 Translation terms, a prevention support system (PSS) for the Communities for Children (CfC) program, a prevention delivery system that is operated by the Department of Social Services in 52 communities across Australia. The aim is to build the capacity for schools and community agencies to transcend system silos; foster ethical practices and respectful relationships; and deliver goal-directed, quantitatively evaluated, evidence-based resources that address the needs of families with complex needs, promote child wellbeing and prevent antisocial and criminal behaviours. The PSS combines web-based interactive electronic resources for schools and community agencies serving children in CfC communities with systems and processes established by project personnel called Collective Impact Facilitators who build the skills and knowledge of community coalitions to use the electronic resources and implement CREATE effectively. This capacity building exercise is being evaluated through a comprehensive array of pre- and post-measures of coalition functioning. The PSS integrates with national prevention infrastructure developed by DSS, including a Data Exchange System, an Expert Panel, and an Information Exchange.

Benefit-Cost Analysis of a Randomized Evaluation of Communities That Care: Monetizing Intervention Effects on the Initiation of Delinquency and Substance Use Through Grade 12

OBJECTIVE

To determine whether the Communities That Care (CTC) prevention system is a cost-beneficial intervention.

METHODS

Data were from a longitudinal panel of 4,407 youth participating in a randomized controlled trial including 24 towns in 7 states, matched in pairs within state and randomly assigned to condition. Significant differences favoring intervention youth in sustained abstinence from delinquency, alcohol use, and tobacco use through Grade 12 were monetized and compared to economic investment in CTC.

RESULTS

CTC was estimated to produce $4,477 in benefits per youth (discounted 2011 dollars). It cost $556 per youth to implement CTC for 5 years. The net present benefit was $3,920. The benefit-cost ratio was $8.22 per dollar invested. The internal rate of return was 21%. Risk that investment would exceed benefits was minimal. Investment was expected to be recouped within 9 years. Sensitivity analyses in which effects were halved yielded positive cost-beneficial results.

CONCLUSIONS

CTC is a cost-beneficial, community-based approach to preventing initiation of delinquency, alcohol use, and tobacco use. CTC is estimated to generate economic benefits that exceed implementation costs when disseminated with fidelity in communities.

Relating coalition capacity to the adoption of science-based prevention in communities: evidence from a randomized trial of Communities That Care

Coalition-based efforts that use a science-based approach to prevention can improve the wellbeing of community youth. This study measured several coalition capacities that are hypothesized to facilitate the adoption of a science-based approach to prevention in communities. Using data from 12 coalitions participating in a community-randomized trial of the prevention strategy Communities That Care (CTC), this paper describes select measurement properties of five salient coalition capacities (member substantive knowledge of prevention, member acquisition of new skills, member attitudes toward CTC, organizational linkages, and influence on organizations), as reported by coalition members, and examines the degree to which these capacities facilitated the community leader reports of the community-wide adoption of a science-based approach to prevention. Findings indicated that the five coalition capacities could be reliably measured using coalition member reports. Meta-regression analyses found that CTC had a greater impact on the adoption of a science-based prevention approach in 12 matched pairs of control and CTC communities where the CTC coalition had greater member (new skill acquisition) and organizational capacities (organizational linkages).

Variation in the Effect of Communities That Care on Community Adoption of a Scientific Approach to Prevention

Tested and effective approaches are available to prevent mental, emotional, and behavioral problems in youth, but such approaches are underused. Communities That Care (CTC) is a coalition-based strategy that aims to increase the use of tested and effective programs by combining the use of scientific evidence and stakeholder consensus to support the community adoption of a scientific approach to preventing mental, emotional, and behavioral problems in youth. A community-randomized trial of CTC was conducted with a sample of 24 communities matched in pairs and assigned randomly to a control or an intervention condition. The findings demonstrate that CTC significantly increases the community-wide adoption of a science-based approach to prevention. Using a meta-analysis technique, this study shows that despite uniformly high-fidelity implementation of CTC in intervention communities, the effect of CTC on the adoption of a scientific approach to prevention varies significantly across the 12 community pairs. Understanding the extent of variation in the effect of CTC on adopting a science-based approach to prevention lays a foundation for identifying aspects of coalition structure, functioning, or capacity that not only may help explain variation in adoption, but may in turn be targeted to strengthen the effect of CTC on the adoption of a science-based approach to prevention within communities.