Genetic and phenotypic similarity across major psychiatric disorders: a systematic review and quantitative assessment.

There is widespread overlap across major psychiatric disorders, and this is the case at different levels of observations, from genetic variants to brain structures and function and to symptoms. However, it remains unknown to what extent these commonalities at different levels of observation map onto each other. Here, we systematically review and compare the degree of similarity between psychiatric disorders at all available levels of observation. We searched PubMed and EMBASE between January 1, 2009 and September 8, 2022. We included original studies comparing at least four of the following five diagnostic groups: Schizophrenia, Bipolar Disorder, Major Depressive Disorder, Autism Spectrum Disorder, and Attention Deficit Hyperactivity Disorder, with measures of similarities between all disorder pairs. Data extraction and synthesis were performed by two independent researchers, following the PRISMA guidelines. As main outcome measure, we assessed the Pearson correlation measuring the degree of similarity across disorders pairs between studies and biological levels of observation. We identified 2975 studies, of which 28 were eligible for analysis, featuring similarity measures based on single-nucleotide polymorphisms, gene-based analyses, gene expression, structural and functional connectivity neuroimaging measures. The majority of correlations (88.6%) across disorders between studies, within and between levels of observation, were positive. To identify a consensus ranking of similarities between disorders, we performed a principal component analysis. Its first dimension explained 51.4% (95% CI: 43.2, 65.4) of the variance in disorder similarities across studies and levels of observation. Based on levels of genetic correlation, we estimated the probability of another psychiatric diagnosis in first-degree relatives and showed that they were systematically lower than those observed in population studies. Our findings highlight that genetic and brain factors may underlie a large proportion, but not all of the diagnostic overlaps observed in the clinic.

Whose responsibility? Part 2 of 2: views of patients, families, and clinicians about responsibilities for addressing the needs of persons with mental health problems in Chennai, India and Montreal, Canada.

BACKGROUND: Individuals with mental health problems have many insufficiently met support needs. Across sociocultural contexts, various parties (e.g., governments, families, persons with mental health problems) assume responsibility for meeting these needs. However, key stakeholders' opinions of the relative responsibilities of these parties for meeting support needs remain largely unexplored. This is a critical knowledge gap, as these perceptions may influence policy and caregiving decisions. METHODS: Patients with first-episode psychosis (n = 250), their family members (n = 228), and clinicians (n = 50) at two early intervention services in Chennai, India and Montreal, Canada were asked how much responsibility they thought the government versus persons with mental health problems; the government versus families; and families versus persons with mental health problems should bear for meeting seven support needs of persons with mental health problems (e.g., housing; help covering costs of substance use treatment; etc.). Two-way analyses of variance were conducted to examine differences in ratings of responsibility between sites (Chennai, Montreal); raters (patients, families, clinicians); and support needs. RESULTS: Across sites and raters, governments were held most responsible for meeting each support need and all needs together. Montreal raters assigned more responsibility to the government than did Chennai raters. Compared to those in Montreal, Chennai raters assigned more responsibility to families versus persons with mental health problems, except for the costs of substance use treatment. Family raters across sites assigned more responsibility to governments than did patient raters, and more responsibility to families versus persons with mental health problems than did patient and clinician raters. At both sites, governments were assigned less responsibility for addressing housing- and school/work reintegration-related needs compared to other needs. In Chennai, the government was seen as most responsible for stigma reduction and least for covering substance use services. CONCLUSIONS: All stakeholders thought that governments should have substantial responsibility for meeting the needs of individuals with mental health problems, reinforcing calls for greater government investment in mental healthcare across contexts. The greater perceived responsibility of the government in Montreal and of families in Chennai may both reflect and influence differences in cultural norms and healthcare systems in India and Canada.

Whose responsibility? Part 1 of 2: A scale to assess how stakeholders apportion responsibilities for addressing the needs of persons with mental health problems.

BACKGROUND: Individuals with mental health problems have multiple, often inadequately met needs. Responsibility for meeting these needs frequently falls to patients, their families/caregivers, and governments. Little is known about stakeholders' views of who should be responsible for these needs and there are no measures to assess this construct. This study's objectives were to present the newly designed Whose Responsibility Scale (WRS), which assesses how stakeholders apportion responsibility to persons with mental health problems, their families, and the government for addressing various needs of persons with mental health problems, and to report its psychometric properties. METHODS: The 22-item WRS asks respondents to assign relative responsibility to the government versus persons with mental health problems, government versus families, and families versus persons with mental health problems for seven support needs. The items were modelled on a World Values Survey item comparing the government's and people's responsibility for ensuring that everyone is provided for. We administered English, Tamil, and French versions to 57 patients, 60 family members, and 27 clinicians at two early psychosis programs in Chennai, India, and Montreal, Canada, evaluating test-retest reliability, internal consistency, and ease of use. Internal consistency estimates were also calculated for confirmatory purposes with the larger samples from the main comparative study. RESULTS: Test-retest reliability (intra-class correlation coefficients) generally ranged from excellent to fair across stakeholders (patients, families, and clinicians), settings (Montreal and Chennai), and languages (English, French, and Tamil). In the standardization and larger confirmatory samples, internal consistency estimates (Cronbach's alphas) ranged from acceptable to excellent. The WRS scored average on ease of comprehension and completion. Scores were spread across the 1-10 range, suggesting that the scale captured variations in views on how responsibility for meeting needs should be distributed. On select items, scores at one end of the scale were never endorsed, but these reflected expected views about specific needs (e.g., Chennai patients never endorsed patients as being substantially more responsible for housing needs than families). CONCLUSIONS: The WRS is a promising measure for use across geo-cultural contexts to inform mental health policies, and to foster dialogue and accountability among stakeholders about roles and responsibilities. It can help researchers study stakeholders' views about responsibilities, and how these shape and are shaped by sociocultural contexts and mental healthcare systems.

Economic Evaluation of Extended Early Intervention Service vs Regular Care Following 2 Years of Early Intervention: Secondary Analysis of a Randomized Controlled Trial.

Cost-effectiveness studies of early intervention services (EIS) for psychosis have not included extension beyond the first 2 years. We sought to evaluate the cost-effectiveness of a 3-year extension of EIS compared to regular care (RC) from the public health care payer's perspective. Following 2 years of EIS in a university setting in Montreal, Canada, patients were randomized to a 3-year extension of EIS (n = 110) or RC (n = 110). Months of total symptom remission served as the main outcome measure. Resource use and cost data for publicly covered health care services were derived mostly from administrative systems. The incremental cost-effectiveness ratio (ICER) and cost-effectiveness acceptability curve were produced. Relative cost-effectiveness was estimated for those with duration of untreated psychosis (DUP) of 12 weeks or less vs longer. Extended early intervention had higher costs for psychiatrist and nonphysician interventions, but total costs were not significantly different. The ICER was $1627 per month in total remission. For the intervention to have an 80% chance of being cost-effective, the decision-maker needs to be willing to pay $5942 per month of total symptom remission. DUP ≤ 12 weeks was associated with a reduction in costs of $12 276 even if no value is placed on additional months in total remission. Extending EIS for psychosis for people, such as those included in this study, may be cost-effective if the decision-maker is willing to pay a high price for additional months of total symptom remission, though one commensurate with currently funded interventions. Cost-effectiveness was much greater for people with DUP ≤12 weeks.

ACCESS Open Minds at the University of Alberta: Transforming student mental health services in a large Canadian post-secondary educational institution.

AIM: Demands for mental health services in post-secondary institutions are increasing. This paper describes key features of a response to these needs: ACCESS Open Minds University of Alberta (ACCESS OM UA) is focused on improving mental health services for first-year students, as youth transition to university and adulthood. METHODS: The core transformation activities at ACCESS OM UA are described, including early case identification, rapid access, appropriate and timely connections to follow-up care and engagement of students and families/carers. In addition, we depict local experiences of transforming existing services around these objectives. RESULTS: The ACCESS OM UA Network has brought together staff with diverse backgrounds in order to address the unique needs of students. Together with the addition of ACCESS Clinicians these elements represent a systematic effort to support not just mental health, but the student as a whole. Key learnings include the importance of community mapping to developing networks and partnerships, and engaging stakeholders from design through to implementation for transformation to be sustainable. CONCLUSIONS: Service transformation grounded in principles of community-based research allows for incorporation of local knowledge, expertise and opportunities. This approach requires ample time to consult, develop rapport between staff and stakeholders across diverse units and develop processes in keeping with local opportunities and constraints. Ongoing efforts will continue to monitor changing student needs and to evaluate and adapt the transformations outlined in this paper to reflect those needs.

Improving mental health services for homeless youth in downtown Montreal, Canada: Partnership between a local network and ACCESS Esprits ouverts (Open Minds), a National Services Transformation Research Initiative.

AIM: In many parts of the world, there is growing concern about youth homelessness. Homeless youth are particularly vulnerable to psychological distress, substance use and mental disorders, and premature mortality caused by suicide and drug overdose. However, their access to and use of mental health care is very limited. METHODS: The Réseau d'intervention de proximité auprès des jeunes (RIPAJ), a Montreal network of over 20 community stakeholders providing a wide array of cohesive services, was created to ease homeless youth's access to mental health and psychosocial services. Its philosophy is that there should be no "wrong door" or "wrong timing" for youth seeking help. In 2014, the network partnered with the pan-Canadian transformational research initiative, ACCESS Esprits ouverts. RESULTS: Created through this partnership, ACCESS Esprits ouverts RIPAJ has been promoting early identification through outreach activities targeting homeless youth and agencies that serve them. An ACCESS Clinician was hired to promote and rapidly respond to help-seeking and referrals. By strengthening connections within RIPAJ and using system navigation, the site is working to facilitate youth's access to timely appropriate care and eliminate age-based transitions between services. A notable feature of our program, that is not usually evident in homelessness services, has been the engagement of the youth in service planning and design and the encouragement of contact with families and/or friends. CONCLUSION: Challenges remain including eliminating any remaining age-related transitions of care between adolescent and adult services; and the sustainability of services transformation and network coordination. Nonetheless, this program serves as an example of an innovative, much-needed, community-oriented model for improving access to mental health care for homeless youth.

Transforming youth mental health care in a semi-urban and rural region of Canada: A service description of ACCESS Open Minds Chatham-Kent.

AIM: This study describes how mental health services for youth are being transformed within the context of a semi-urban and rural region of Canada (Chatham-Kent, Ontario), based on the framework of ACCESS Open Minds (ACCESS OM), a pan-Canadian youth mental health research and evaluation network. METHODS: Transformation has focused on the five key objectives of ACCESS OM, namely early identification, rapid access, appropriate care, continuity of care, and youth and family engagement. A community mapping process was conducted at the beginning of the transformation to help develop a comprehensive inventory of services, identify challenges and optimize partnerships to address the five key objectives. RESULTS: The following strategies represent key elements in the transformation: coordination and partnerships between hospital, community and voluntary organizations, as well as different sectors of the community (e.g., Child and Youth Services, Education, Community Safety and Correctional Services, CSCS); working with local champions (e.g., Youth Diversion Officer and the Mental Health and Addictions Nurse in the school sectors); establishing a youth-friendly space in a central part of the community, where services are co-located and operate within an open-concept design; training of ACCESS Clinicians to conduct an initial assessment; engaging youth and family in service-level recruitment, planning, daily operations, and evaluation, including hiring of youth and family peer navigators; and, engaging the community through awareness and educational events. CONCLUSIONS: The success of this transformation needs to be measured on various outcome parameters, but it is notable that neighbouring communities are already beginning to implement a similar model.

Transforming youth mental health services in a large urban centre: ACCESS Open Minds Edmonton.

AIM: This paper outlines the transformation of youth mental health services in Edmonton, Alberta, a large city in Western Canada. We describe the processes and challenges involved in restructuring how services and care are delivered to youth (11-25 years old) with mental health needs based on the objectives of the pan-Canadian ACCESS Open Minds network. METHODS: We provide a narrative review of how youth mental health services have developed since our engagement with the ACCESS Open Minds initiative, based on its five central objectives of early identification, rapid access, appropriate care, continuity of care, and youth and family engagement. RESULTS: Building on an initial community mapping exercise, a service network has been developed; teams that were previously age-oriented have been integrated together to seamlessly cover the age 11 to 25 range; early identification has thus far focused on high-school populations; and an actual drop-in space facilitates rapid access and linkages to appropriate care within the 30-day benchmark. CONCLUSIONS: Initial aspects of the transformation have relied on restructuring and partnerships that have generated early successes. However, further transformation over the longer term will depend on data demonstrating how this has impacted clinical outcomes and service utilization. Ultimately, sustainability in a large urban centre will likely involve scaling up to a network of similar services to cover the entire population of the city.

Improving youth mental wellness services in an Indigenous context in Ulukhaktok, Northwest Territories: ACCESS Open Minds Project.

AIM: To describe a community-specific and culturally coherent approach to youth mental health services in a small and remote northern Indigenous community in Canada's Northwest Territories, under the framework of ACCESS Open Minds (ACCESS OM), a pan-Canadian youth mental health research and evaluation network. METHODS: As 1 of the 14 Canadian communities participating in a 5-year, federally funded service transformation and evaluation project, the arctic Inuit community of Ulukhaktok has undertaken culturally relevant adjustments in their delivery of youth mental wellness services and related community wellness initiatives. These enhancement activities highlight connections to culture and traditional skills, honour youth- and community-expressed desires to incorporate Inuvialuit-specific approaches to wellness, and strengthen the support systems to improve access to mainstream mental healthcare, when needed. The adaptation of a Lay Health Worker model from Global Mental Health to the local circumstances resulting in creation of lay community health workers is central to this approach in meeting contextual needs. RESULTS: Community leaders identified key activities for sustainable change, including human capital development, authentic collaboration and diversified engagement strategies. Building around five ACCESS OM objectives, the local site team in Ulukhaktok has identified its youth programming and mental wellness service gaps through an ongoing process of community mapping. CONCLUSIONS: Information from service providers, youth and other community members demonstrates attuning of the ACCESS OM framework to Inuit paradigms in Ulukhaktok. It could prove to be a sustainable prototype for delivering youth mental health services in other communities in the Inuvialuit Settlement Region and possibly across the entire Inuit Nunangat. It needs, however, to be further supported by easier access to specialized mental health services when needed.

Canadian response to need for transformation of youth mental health services: ACCESS Open Minds (Esprits ouverts).

AIM: Youth mental health is of paramount significance to society globally. Given early onset of mental disorders and the inadequate access to appropriate services, a meaningful service transformation, based on globally recognized principles, is necessary. The aim of this paper is to describe a national Canadian project designed to achieve transformation of mental health services and to evaluate the impact of such transformation on individual and system related outcomes. METHOD: We describe a model for transformation of services for youth with mental health and substance abuse problems across 14 geographically, linguistically and culturally diverse sites, including large and small urban, rural, First Nations and Inuit communities as well as homeless youth and a post-secondary educational setting. The principles guiding service transformation and objectives are identical across all sites but the method to achieve them varies depending on prevailing resources, culture, geography and the population to be served and how each community can best utilize the extra resources for transformation. RESULTS: Each site is engaged in community mapping of services followed by training, active stakeholder engagement with youth and families, early case identification initiatives, providing rapid access (within 72 hours) to an assessment of the presenting problems, facilitating connection to an appropriate service within 30 days (if required) with no transition based on age within the 11 to 25 age group and a structured evaluation to track outcomes over the period of the study. CONCLUSIONS: Service transformation that is likely to achieve substantial change involves very detailed and carefully orchestrated processes guided by a set of values, principles, clear objectives, training and evaluation. The evidence gathered from this project can form the basis for scaling up youth mental health services in Canada across a variety of environments.

The Clinic for Assessment of Youth at Risk (CAYR): 10 years of service delivery and research targeting the prevention of psychosis in Montreal, Canada.

AIM: In the context of an increasing focus on indicated prevention of psychotic disorders, we describe the operation of the Clinic for Assessment of Youth at Risk (CAYR) over 10 years, a specialized service for identification, monitoring and treatment of young individuals who meet ultra-high risk (UHR) criteria for psychosis, and its integration within the Prevention and Early Intervention Program for Psychosis (PEPP) in Montreal, Canada. METHODS: We outline rationale, development, inclusion and exclusion criteria, assessment, services offered, community outreach and liaison with potential referral sites, and our research focus on risk and protective factors related to the neural diathesis-stress model of psychosis. RESULTS: Between January 2005 and December 2014, CAYR has received 370 referrals and accepted 177 patients who met UHR criteria based on the Comprehensive Assessment for At Risk Mental States. Conversion rates to a first episode of psychosis were 11%. Our research findings point to high subjective stress levels, poor self-esteem, social support and coping skills, and a dysregulation of the hypothalamus-pituitary-adrenal axis during the high-risk phase. CONCLUSIONS: Our efforts at community outreach have resulted in increasing numbers of referrals and patients accepted to CAYR, highlighting the relevance of and need for a high-risk programme in the Montreal area. Patients with psychotic symptoms can be immediately assigned to the first-episode psychosis clinic within PEPP, which has likely contributed to the low conversion rates observed in the UHR group. Our research findings on stress and protective factors emphasize the importance of psychosocial interventions for high-risk patients.

From early intervention in psychosis to youth mental health reform: a review of the evolution and transformation of mental health services for young people.

PURPOSE: The objective of this review is to report on recent developments in youth mental health incorporating all levels of severity of mental disorders encouraged by progress in the field of early intervention in psychotic disorders, research in deficiencies in the current system and social advocacy. METHODS: The authors have briefly reviewed the relevant current state of knowledge, challenges and the service and research response across four countries (Australia, Ireland, the UK and Canada) currently active in the youth mental health field. RESULTS: Here we present information on response to principal challenges associated with improving youth mental services in each country. Australia has developed a model comprised of a distinct front-line youth mental health service (Headspace) to be implemented across the country and initially stimulated by success in early intervention in psychosis; in Ireland, Headstrong has been driven primarily through advocacy and philanthropy resulting in front-line services (Jigsaw) which are being implemented across different jurisdictions; in the UK, a limited regional response has addressed mostly problems with transition from child-adolescent to adult mental health services; and in Canada, a national multi-site research initiative involving transformation of youth mental health services has been launched with public and philanthropic funding, with the expectation that results of this study will inform implementation of a transformed model of service across the country including indigenous peoples. CONCLUSIONS: There is evidence that several countries are now engaged in transformation of youth mental health services and in evaluation of these initiatives.

Neural markers of remission in first-episode schizophrenia: a volumetric neuroimaging study of the hippocampus and amygdala.

OBJECTIVE: The temporolimbic region has been implicated in the pathophysiology in schizophrenia. More specifically, significantly smaller hippocampal volumes but not amygdala volumes have been identified at onset in first-episode schizophrenia (FES) patients. However, volumetric differences (namely, in the hippocampus) exhibit an ambiguous relationship with long-term outcome. So, we examined the relationship between hippocampus and amygdala volumes and early remission status. METHODS: We compared hippocampus and amygdala volumes between 40 non-remitted and 17 remitted FES patients and 57 healthy controls. Amygdala and hippocampus were manually traced with the hippocampus additionally segmented into three parts: body, head, and tail. Remission was defined as mild or less on both positive and negative symptoms over a period of 6 consecutive months as per the 2005 Remission in Schizophrenia Working Group criteria. RESULTS: A significant [group x structure x side] interaction revealed outcome groups differed in hippocampus tail volumes; significantly on the left (non-remitted=694+/-175 mm(3); remitted=855+/-133 mm(3); p=0.001) with a trend difference on the right (non-remitted=723+/-162 mm(3); remitted=833+/-126 mm(3); p=0.023). Groups did not differ in body, head, or amygdala volumes bi-laterally. CONCLUSIONS: A smaller hippocampal tail volume may represent a neural marker in FES patients who do not achieve early remission after the first 6 months of treatment. The early identification of patients with poor outcome with respect to the hippocampus tail may encourage the search for new, more target-specific, medications in hope of improving outcome and moving us towards a better understanding of the pathophysiology of schizophrenia.

Validation of the English and French versions of the Community Assessment of Psychic Experiences (CAPE) with a Montreal community sample.

OBJECTIVE: The aim of this study was to examine the reliability, validity and factor structure of the Community Assessment of Psychic Experiences (CAPE), a 42-item self-report questionnaire. We analyzed the internal consistency of the CAPE to determine whether the 3-factor structure (positive, negative and depressive symptoms) found by the CAPE authors would also be found in our sample. METHOD: A sample of 2275 individuals from the general community in the Montreal area completed the questionnaire in either French or English. RESULTS: The internal consistencies of the original three subscales were good and the confirmatory factor models had a good fit. The exploratory factor analysis suggested a 3-5-factor solution, without improving the alternative factor structures. The 4-factor solution separated positive symptoms into factors we called 'bizarre positive symptoms' and 'social delusions', and the 5-factor solution separated positive symptoms further and included a 'popular psychic beliefs' factor. Results suggest that the scalability might be improved by shortening the original questionnaire to 23 items with the same 3 original scales. CONCLUSION: We support the internal consistency of the CAPE. Although alternative scaling (4 and 5 factors) did not improve the model fit, researchers interested in distinguishing 3 factors of positive symptoms could find utility in these two new scales. Finally, reducing the number of CAPE items could be useful for shorter surveys. Future studies should test the implications of these suggestions.