Corrigendum: Initial adaptation of the OnTrack coordinated specialty care model in Chile: An application of the Dynamic Adaptation Process.

[This corrects the article DOI: 10.3389/frhs.2022.958743.].

Supporting Vulnerable People During Challenging Transitions: A Systematic Review of Critical Time Intervention.

Critical Time Intervention (CTI) is designed to reduce the risk of homelessness and other adverse outcomes by providing support to individuals during challenging life course transitions. While several narrative reviews suggest the benefit of CTI, the evidence on the model's effectiveness has not been systematically reviewed. This article systematically reviews studies of CTI applied to a variety of populations and transition types. Following the Preferred Reporting Items for Systematic Review and Meta-Analysis for protocols (PRISMA-P) guidelines, we reviewed 13 eligible experimental and quasi-experimental studies. Findings were summarized by individual outcome domains, including housing, service engagement use, hospitalization or emergency services, mental health, substance use, family and social support, and quality of life. CTI had a consistent positive impact on two primary outcomes-reduced homelessness and increased service engagement use-among different populations and contexts. Despite the effectiveness of CTI, the specific mechanisms of the model's positive impacts remain unclear. Implications for practice, policy and research are addressed.

Critical Time Intervention - Task-Shifting for Individuals with Psychosis in Latin America: A Multi-stakeholder Qualitative Analysis of Implementation Barriers and Facilitators.

This article presents the results of a qualitative study conducted to understand the barriers and facilitators in implementing a pilot trial of Critical Time Intervention-Task-Shifting-a time-limited, community-based, recovery-oriented intervention for individuals with psychosis-in Rio de Janeiro, Brazil, and Santiago, Chile. Data included 40 semi-structured interviews with service users, task-shifting providers, and administrators. Analysis proceeded in three iterative phases and combined inductive and deductive approaches. Coding frameworks for implementation factors, and whether or not they acted as barriers and facilitators, were developed and refined using many domains and constructs from the Consolidated Framework for Implementation Research. Barriers and facilitators were ultimately grouped into five domains: 1-Personal; 2-Interpersonal; 3-Intervention; 4-Mental Health System; and 5-Contextual. A rating system was also developed and applied, which enabled comparisons across stakeholders and study sites. Major facilitators included intervention characteristics such as the roles of the task-shifting providers and community-based care. Top barriers included mental health stigma and community conditions (violence). Nevertheless, the findings suggest that Critical Time Intervention-Task-Shifting is largely acceptable and feasible, and could contribute to efforts to strengthen community mental health systems of care for individuals with psychosis in Latin America, especially in advancing the task-shifting strategy and the recovery-oriented approach.

OnTrack Chile for people with early psychosis: a study protocol for a Hybrid Type 1 trial.

BACKGROUND: Substantial data from high-income countries support early interventions in the form of evidence-based Coordinated Specialty Care (CSC) for people experiencing First Episode Psychosis (FEP) to ameliorate symptoms and minimize disability. Chile is unique among Latin American countries in providing universal access to FEP services through a national FEP policy that mandates the identification of FEP individuals in primary care and guarantees delivery of community-based FEP treatments within a public health care system. Nonetheless, previous research has documented that FEP services currently provided at mental health clinics do not provide evidence-based approaches. This proposal aims to address this shortfall by first adapting OnTrackNY (OTNY), a CSC program currently being implemented across the USA, into OnTrackChile (OTCH), and then examine its effectiveness and implementation in Chile. METHODS: The Dynamic Adaptation Process will be used first to inform the adaptation and implementation of OTCH to the Chilean context. Then, a Hybrid Type 1 trial design will test its effectiveness and cost and evaluate its implementation using a cluster-randomized controlled trial (RCT) (N = 300 from 21 outpatient clinics). The OTCH program will be offered in half of these outpatient clinics to individuals ages 15-35. Usual care services will continue to be offered at the other clinics. Given the current COVID-19 pandemic, most research and intervention procedures will be conducted remotely. The study will engage participants over the course of 2 years, with assessments administered at enrollment, 12 months, and 24 months. Primary outcomes include implementation (fidelity, acceptability, and uptake) and service outcomes (person-centeredness, adherence, and retention). Secondary outcomes comprise participant-level outcomes such as symptoms, functioning, and recovery orientation. Over the course of the study, interviews and focus groups with stakeholders will be conducted to better understand the implementation of OTCH. DISCUSSION: Findings from this study will help determine the feasibility, effectiveness, and cost for delivering CSC services in Chile. Lessons learned about facilitators and barriers related to the implementation of the model could help inform the approach needed for these services to be further expanded throughout Latin America. TRIAL REGISTRATION: www. CLINICALTRIALS: gov NCT04247711 . Registered 30 January 2020. TRIAL STATUS: The OTCH trial is currently recruiting participants. Recruitment started on March 1, 2021, and is expected to be completed by December 1, 2022. This is the first version of this protocol (5/12/2021).

A Recovery-Oriented Intervention for People With Psychosis: A Pilot Randomized Controlled Trial.

OBJECTIVE: This pilot randomized controlled trial evaluated the effectiveness of critical time intervention-task shifting (CTI-TS) for people with psychosis in Santiago, Chile, and Rio de Janeiro. CTI-TS is a 9-month intervention involving peer support workers and is designed to maintain treatment effects up to 18 months. METHODS: A total of 110 people with psychosis were recruited when they enrolled in community mental health clinics (Santiago, N=60; Rio de Janeiro, N=50). Participants within each city were randomly assigned to either CTI-TS or usual care for 9 months. Primary outcomes were quality of life, measured with the World Health Organization Quality of Life Assessment-Brief Version (WHOQOL-BREF), and unmet needs, measured with the Camberwell Assessment of Need (CAN), at 18-month follow-up. Results were analyzed according to intention-to-treat guidelines. Generalized estimating equations, with observations clustered within cities, and multiple imputation for missing data were used. RESULTS: At 18 months, both groups showed improved primary outcomes. In both unadjusted and fully adjusted analyses, no significant differences between CTI-TS and usual care (WHOQOL-BREF question on quality of life and CAN mean number of unmet needs) were found. CONCLUSIONS: Three factors might explain the lack of difference between CTI-TS and usual care: first-contact enrollment precluded rapport prior to randomization, a minority of patients were uncomfortable with peers being on the treatment team, and primary outcome measures may not have been sensitive enough to capture the effects of a recovery-oriented intervention. The results have implications for the design of transitional services for people with psychosis, especially in Latin America.

Initial adaptation of the OnTrack coordinated specialty care model in Chile: An application of the Dynamic Adaptation Process.

Background: In 2005, Chile became the first country in Latin America to guarantee universal free access for the diagnosis and treatment of schizophrenia. A cluster randomized control trial utilizing the Dynamic Adaptation Process framework is underway to adapt and test the OnTrack coordinated specialty care model to provide recovery-oriented, person-centered care by a multidisciplinary team for individuals with first episode psychosis (FEP) in Chile. Methods: A qualitative formative research study was conducted to inform the initial adaptation of the OnTrack Chile (OTCH) program. We conducted key informant interviews (n = 17) with various stakeholders (policymakers; directors/managers of community mental health centers; mental health professionals) and focus group discussions (n = 6) with individuals with FEP and caregivers (n = 35 focus group participants total). Data was analyzed using thematic analysis, organized by participants' perspectives on the benefits, barriers, and recommendations for the key principles, multidisciplinary team, psychosocial components, and the training and supervision model of OnTrack. Results: Participants expressed enthusiasm and support for OnTrack's recovery-oriented and person-centered principles of care. While many participants lauded the emphasis on shared decision-making and family involvement, some reported reticence, citing that it is culturally normative for patients and families to adopt a passive role in treatment. Peer specialists, and the family psychoeducation and support and supported education and employment components were perceived as aspects that could encourage the promotion of personhood and autonomy development. However, implementation challenges, including the prevailing biomedical approach, professional hierarchy, and the lack of infrastructure, human, and financial resources necessitate some modifications to these aspects. Some mental health professionals further conveyed reservations regarding the perceived hierarchical structure of the supervision model. Conclusion: OnTrack represents a shift from a biomedical model to a valued, aspirational, person-centered and culturally responsive model that focuses on recovery, shared decision-making and psychosocial care. With the appropriate governmental and agency-level provision of resources and modifications to some of the program components, particularly regarding the shared decision-making framework, peer specialist, family engagement, and the training supervision model, OTCH could be a transformative program for a more comprehensive, evidence-based care for individuals with FEP in Chile.

Understanding Users' Perspectives of Psychosocial Mechanisms Underpinning Peer Support Work in Chile.

This study explores the beliefs and attitudes about the psychosocial mechanisms of peer support work among users who participated in Critical Time Intervention-Task Shifting (CTI-TS), which tested the acceptability and feasibility of a peer support work model to improve community-based mental health care for individuals with psychosis in Latin America. We conducted a secondary analysis of 15 in-depth interviews with CTI-TS participants in Chile, using the framework method and defined the framework domains based on five major mechanisms of peer support work identified by a recent literature review. The analysis revealed that users' perceptions of peer support work mechanisms were strongly shaped by personal motivations, beliefs about professional hierarchies, familial support, and the Chilean mental health system's incipient recovery orientation. The findings underscore the importance of adopting culturally tailored strategies to promote peer support work, such as involving mental health professionals and fostering equal-powered relationships between PSWs and users.

Implementation of a pilot community-based psychosocial intervention for patients with psychoses in Chile and Brazil: a comparative analysis of users' perspectives.

BACKGROUND: Few studies provide clear rationale for and the reception of adaptations of evidence-based interventions. To address this gap, we describe the context-dependent adaptations in critical time intervention-task shifting (CTI-TS), a manualized recovery program for individuals with psychosis in Rio de Janeiro, Brazil and Santiago, Chile. Implications of the adaptations - incorporating a task-shifting approach and modifying the mode of community-based service delivery - are examined from users' perspectives. METHODS: A secondary analysis of in-depth interviews with CTI-TS users (n = 9 in Brazil; n = 15 in Chile) was conducted. Using the framework method, we thematically compared how participants from each site perceived the main adapted components of CTI-TS. RESULTS: Users of both sites appreciated the task-shifting worker pair to provide personalized, flexible, and relatable support. They wanted CTI-TS to be longer and experienced difficulty maintaining intervention benefits in the long-term. In Chile, stigma and a perceived professional hierarchy toward the task-shifting providers were more profound than in Brazil. Engagement with community-based services delivery in homes and neighborhoods (Chile), and at community mental health centers (Brazil) were influenced by various personal, familial, financial, and social factors. Uniquely, community violence was a significant barrier to engagement in Brazil. CONCLUSION: CTI-TS' major adaptations were informed by the distinct mental health systems and social context of Santiago and Rio. Evaluation of user experiences with these adaptations provides insights into implementing and scaling-up task-shifting and community-oriented interventions in the region through the creation of specialized roles for the worker pair, targeting sustained intervention effects, and addressing socio-cultural barriers.

Fidelity Assessment of a Social Work-Led Intervention Among Patients with Firearm Injuries.

PURPOSE: To support future development and refinement of social work-led intervention programs among patients with firearm injuries and to demonstrate how a fidelity assessment can be used to adjust and refine intervention delivery in an ongoing trial. METHODS: We conducted a fidelity assessment of a randomized controlled trial of a social work-led intervention among patients with a firearm injury. RESULTS: We found that our study intervention was well implemented, meeting 70% of the fidelity assessment score items, however noted lower fidelity with client-based items. DISCUSSION: As a result of fidelity assessment findings, we refined intervention delivery to improve implementation fidelity including beginning to review cases of all patients each month, rather than focusing on patients in crisis. Our fidelity assessment process and findings offer insight into the challenges of implementing an intervention among patients with firearm injuries and highlights the value of monitoring intervention fidelity during an ongoing trial.

Pilot Study Evaluating Critical Time Intervention for Individuals With Hoarding Disorder at Risk for Eviction.

Hoarding disorder has significant health consequences, including the devastating threat of eviction. In this pilot study, critical time intervention (CTI), an evidence-based model of case management shown to be effective for vulnerable populations, was adapted for individuals with severe symptoms of hoarding disorder at risk for eviction (CTI-HD). Of the 14 adults who enrolled, 11 participants completed the 9-month intervention. Completers reported a modest decrease in hoarding severity, suggesting that, while helpful, CTI-HD alone is unlikely to eliminate the risk of eviction for individuals with severe symptoms of hoarding disorder.

Implementing the protocol of a pilot randomized controlled trial for the recovery-oriented intervention to people with psychoses in two Latin American cities.

Several Latin American countries have made remarkable strides towards offering community mental health care for people with psychoses. Nonetheless, mental health clinics generally have a very limited outreach in the community, tending to have weaker links to primary health care; rarely engaging patients in providing care; and usually not providing recovery-oriented services. This paper describes a pilot randomized controlled trial (RCT) of Critical Time Intervention-Task Shifting (CTI-TS) aimed at addressing such limitations. The pilot RCT was conducted in Santiago (Chile) and Rio de Janeiro (Brazil). We included 110 people with psychosis in the study, who were recruited at the time of entry into community mental health clinics. Trial participants were randomly divided into CTI-TS intervention and usual care. Those allocated to the intervention group received usual care and, in addition, CTI-TS services over a 9-month period. Primary outcomes include quality of life (WHO Quality of Life Scale - Brief Version) and unmet needs (Camberwell Assessment of Needs) at the 18-month follow-up. Primary outcomes at 18 months will be analyzed by Generalized Estimating Equations (GEE), with observations clustered within sites. We will use three-level multilevel models to examine time trends on the primary outcomes. Similar procedures will be used for analyzing secondary outcomes. Our hope is that this trial provides a foundation for planning a large-scale multi-site RCT to establish the efficacy of recovery-oriented interventions such as CTI-TS in Latin America.

Implementing a community-based task-shifting psychosocial intervention for individuals with psychosis in Chile: Perspectives from users.

BACKGROUND: Latin America, and Chile in particular, has a rich tradition of community mental health services and programs. However, in vivo community-based psychosocial interventions, especially those with a recovery-oriented approach, remain scarce in the region. Between 2014 and 2015, a Critical Time Intervention-Task Shifting project (CTI-TS) was implemented in Santiago, Chile, as part of a larger pilot randomized control trial. CTI is a time-limited intervention delivered at a critical-time to users, is organized by phases, focuses on specific objectives and decreases in intensity over time. CTI-TS, which combines both the task-shifting strategy and the use of peers, introduces a novel approach to community mental health care that has not yet been tried in Chile. AIMS: We aim to evaluate the feasibility, acceptability and applicability of such a community-based psychosocial intervention in urban settings in Latin America - specifically, in Santiago (Chile) from a user perspective. METHOD: We analyzed 15 in-depth interviews ( n = 15) with service users who participated in the intervention about their perceptions and experiences with CTI-TS through thematic analysis. RESULTS: Three themes were revealed. The first was related to the structural characteristics of CTI-TS, especially regarding the timing, duration and phasic nature of the intervention. The second pertained to the acceptability of the in vivo community-based approach. The third theme dealt with the task-shifting aspect, that is, users' perceptions of the peer support workers and the community mental health workers. CONCLUSIONS: CTI-TS was generally acceptable in this Latin American context. Users' perspectives pointed to the need to make adjustments to some of the structural characteristics of the CTI model and to combine this type of intervention with others that can address stigma. Thus, future adaptations of CTI-TS or similar psychosocial interventions in Latin American contexts are feasible and can enhance community mental health in the region.

Implementing the protocol of a pilot randomized controlled trial for the recovery-oriented intervention to people with psychoses in two Latin American cities / Implementação de um protocolo para um estudo piloto randomizado e controlado sobre uma intervenção voltada para a recuperação em pessoas com psicoses em duas cidades latino-americanas / Implementando un protocolo para una prueba piloto controlada aleatorizada en una intervención orientada a la recuperación de personas con psicosis en dos ciudades latinoamericanas

Several Latin American countries have made remarkable strides towards offering community mental health care for people with psychoses. Nonetheless, mental health clinics generally have a very limited outreach in the community, tending to have weaker links to primary health care; rarely engaging patients in providing care; and usually not providing recovery-oriented services. This paper describes a pilot randomized controlled trial (RCT) of Critical Time Intervention-Task Shifting (CTI-TS) aimed at addressing such limitations. The pilot RCT was conducted in Santiago (Chile) and Rio de Janeiro (Brazil). We included 110 people with psychosis in the study, who were recruited at the time of entry into community mental health clinics. Trial participants were randomly divided into CTI-TS intervention and usual care. Those allocated to the intervention group received usual care and, in addition, CTI-TS services over a 9-month period. Primary outcomes include quality of life (WHO Quality of Life Scale - Brief Version) and unmet needs (Camberwell Assessment of Needs) at the 18-month follow-up. Primary outcomes at 18 months will be analyzed by Generalized Estimating Equations (GEE), with observations clustered within sites. We will use three-level multilevel models to examine time trends on the primary outcomes. Similar procedures will be used for analyzing secondary outcomes. Our hope is that this trial provides a foundation for planning a large-scale multi-site RCT to establish the efficacy of recovery-oriented interventions such as CTI-TS in Latin America.

Diversos países latino-americanos já alcançaram avanços notáveis na oferta de assistência em saúde mental para pessoas com psicoses. No entanto, as clínicas de saúde mental geralmente realizam atividades de extensão muito limitadas dentro das comunidades, tendem a ter vínculos fracos com a assistência primária, raramente envolvem os próprios pacientes nos cuidados e poucas vezes prestam serviços orientados para a recuperação. O artigo descreve um estudo piloto randomizado e controlado sobre a Critical Time Intervention-Task Shifting (CTI-TS), que teve como objetivo analisar essas limitações. O estudo piloto foi realizado em Santiago (Chile) e no Rio de Janeiro (Brasil). Teve como meta a inclusão de 110 pessoas com psicose, recrutadas no momento da entrada em clínicas comunitárias de saúde mental. Os participantes foram randomizados para o CTI-TS ou para os cuidados usuais. Aqueles alocados ao grupo da intervenção receberam os cuidados usuais e os serviços de CTI-TS ao longo de 9 meses. Os desfechos primários incluíram a qualidade de vida (WHO Quality of Life Scale - Brief Version) e as necessidades não atendidas (Camberwell Assessment of Needs) no acompanhamento aos 18 meses. Os desfechos primários aos 18 meses serão analisados com a técnica de Equações de Estimação Generalizadas (GEE), com as observações agrupadas dentro dos locais do estudo. Serão utilizados modelos em três níveis para examinar as tendências temporais nos desfechos primários. Procedimentos semelhantes serão utilizados para analisar os resultados secundários. Espera-se que o estudo forneça uma base para planejar um estudo randomizado e controlado em grande escala e em múltiplos locais para estabelecer a eficácia da intervenção orientada para a recuperação, a exemplo da CTI-TS, na América Latina.

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Critical Time Intervention for People Leaving Shelters in the Netherlands: Assessing Fidelity and Exploring Facilitators and Barriers.

International dissemination of evidence-based interventions calls for rigorous evaluation. As part of an evaluation of critical time intervention (CTI) for homeless people and abused women leaving Dutch shelters, this study assessed fidelity in two service delivery systems and explored factors influencing model adherence. Data collection entailed chart review (n = 70) and two focus groups with CTI workers (n = 11). The intervention obtained an overall score of three out of five (fairly implemented) for compliance fidelity and chart quality combined. Fidelity did not differ significantly between service systems, supporting its suitability for a range of populations. The eight themes that emerged from the focus groups as affecting model adherence provide guidance for future implementation efforts.

Development of a sustainable community mental health program in a remote region: the Austral Institute for Mental Health / Desenvolvimento de um programa sustentável de saúde mental comunitária numa região remota: o Instituto Austral de Saúde Mental

This paper described a community-based rehabilitation program in a remote region of Argentina. The program is located in Neuquén Province, in the Patagonia region. At the time it was initiated, about 20 years ago, the province had an excellent system of primary care, but one in which mental disorders were neglected. There were only a few psychiatrists in the province, and none involved in community care of people with severe mental disorders. Starting from this point, the "Austral" program was developed by making use of the local resources (such as primary care doctors) that were available, and it later earned a reputation as a model program.In 2012, Neuquén became a site of the RedeAmericas, a National Institute of Mental Health funded regional mental health network in Latin America.

Este artigo descreveu um programa comunitário de reabilitação baseado em uma região remota da Argentina. O mesmo está localizado na Província de Neuquén, na Patagônia. No momento em que foi iniciado, há aproximadamente 20 anos, tinha um excelente sistema de cuidados de saúde primários, mas no qual os transtornos mentais foram negligenciados. Havia apenas alguns psiquiatras na província, e nenhum estava envolvido com atendimento comunitário para pessoas com transtornos mentais graves. A partir desse ponto, o programa "Austral" desenvolveu-se por meio da utilização dos recursos locais (como os médicos de cuidados primários) que estavam disponíveis, e com o tempo ganhou reputação de programa modelo. Em 2012, Neuquén tornou-se sede da RedeAmericas, uma rede regional de saúde mental da América Latina financiada pelo governo dos Estados Unidos.

"I hope I can make it out there": perceptions of women with severe mental illness on the transition from hospital to community.

This study explores the experience of women with severe mental illness in transition from psychiatric hospital care to the community. Three focus groups were conducted among women with severe mental illness from transitional residences at two state psychiatric hospitals. Focus group transcripts and notes were coded according to women's perceived challenges and facilitators of transition. Participants described several challenges including fear of insufficient treatment support, safety concerns, social isolation, stigma, and lack of resources to meet daily needs. The supports that women described as important were an orientation to the neighborhood and residence, access to treatment support with flexibility, and connection to social supports.

Trauma exposure and posttraumatic stress disorder among employees of New York City companies affected by the September 11, 2001 attacks on the World Trade Center.

OBJECTIVE: Several studies have provided prevalence estimates of posttraumatic stress disorder (PTSD) related to the September 11, 2001 (9/11) attacks in broadly affected populations, although without sufficiently addressing qualifying exposures required for assessing PTSD and estimating its prevalence. A premise that people throughout the New York City area were exposed to the attacks on the World Trade Center (WTC) towers and are thus at risk for developing PTSD has important implications for both prevalence estimates and service provision. This premise has not, however, been tested with respect to DSM-IV-TR criteria for PTSD. This study examined associations between geographic distance from the 9/11 attacks on the WTC and reported 9/11 trauma exposures, and the role of specific trauma exposures in the development of PTSD. METHODS: Approximately 3 years after the attacks, 379 surviving employees (102 with direct exposures, including 65 in the towers, and 277 with varied exposures) recruited from 8 affected organizations were interviewed using the Diagnostic Interview Schedule/Disaster Supplement and reassessed at 6 years. The estimated closest geographic distance from the WTC towers during the attacks and specific disaster exposures were compared with the development of 9/11-related PTSD as defined by the Diagnostic and Statistical Manual, Fourth Edition, Text Revision. RESULTS: The direct exposure zone was largely concentrated within a radius of 0.1 mi and completely contained within 0.75 mi of the towers. PTSD symptom criteria at any time after the disaster were met by 35% of people directly exposed to danger, 20% of those exposed only through witnessed experiences, and 35% of those exposed only through a close associate's direct exposure. Outside these exposure groups, few possible sources of exposure were evident among the few who were symptomatic, most of whom had preexisting psychiatric illness. CONCLUSIONS: Exposures deserve careful consideration among widely affected populations after large terrorist attacks when conducting clinical assessments, estimating the magnitude of population PTSD burdens, and projecting needs for specific mental health interventions.

Randomized trial of critical time intervention to prevent homelessness after hospital discharge.

OBJECTIVE: This study assessed the effectiveness of a previously tested model, critical time intervention (CTI), in producing an enduring reduction in the risk of homelessness for persons with severe mental illness who were discharged from inpatient psychiatric treatment facilities. METHODS: A total of 150 previously homeless men and women with severe mental illness and who were discharged from inpatient psychiatric hospitalization to transitional residences on the hospital grounds were randomly assigned to receive usual care or usual care plus CTI at the point of discharge to the community. The nine-month intervention aims to gradually pass responsibility to community sources for providing ongoing support after the intervention ends, thereby leading to a durable reduction in risk of future homelessness. After participants were discharged from the transitional residence (length of stay six to 937 days), their housing status was assessed every six weeks for 18 months via participant self-report collected by interviewers blind to study condition. RESULTS: In an intent-to-treat analysis, participants assigned to the CTI group had significantly less homelessness at the end of the follow-up period (the final three six-week intervals) than those assigned to the control group (odds ratio=.22, 95% confidence interval=.06-.88). CONCLUSIONS: A relatively brief, focused intervention for persons with severe mental illness led to a reduction in the risk of homelessness that was evident nine months after the intervention ended. This work suggests that targeted, relatively short interventions applied at critical transition points may enhance the efficacy of long-term supports for persons with severe mental illness who are living in the community.

Critical Time Intervention: an empirically supported model for preventing homelessness in high risk groups.

Critical Time Intervention (CTI) is designed to prevent recurrent homelessness among persons with severe mental illness by enhancing continuity of care during the transition from institutional to community living. After providing the background and rationale of CTI, we describe the elements of the model and summarize the status of existing research on its effectiveness. We then briefly illustrate how the CTI model has begun to be adapted and implemented by providing a case example of a homeless woman's transition from shelter to housing. Finally, we consider plans for the further adaptation, testing and dissemination of CTI in other populations and service delivery settings.