Cited by 57Schizophrenia research and treatmentPsychiatric care and mental health servicesPsychopathy, Forensic Psychiatry, Sexual Offending

Outreach and support in South-London (OASIS) 2001—2020: Twenty years of early detection, prognosis and preventive care for young people at risk of psychosis

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Fusar-Poli, Paolo, Spencer, Thomas, De Micheli, Andrea, Curzi, Victoria, Nandha, Sunil, McGuire, Philip·2020·European Neuropsychopharmacology

Abstract

This study aims to describe twenty years of early detection, prognosis and preventive care in the Outreach and Support In South-London (OASIS) mental health service for individuals at Clinical High risk of psychosis (CHR-P). The study presents a comprehensive analysis of the 2001- 2020 activity of the OASIS team encompassing core domains: (i) service characteristics, (ii) detection, (iii) prognosis, (iv) treatment and (v) clinical research. The analyses employed descriptive statistics, population-level data, the epidemiological incidence of psychosis, Kaplan Meier failure functions and Greenwood 95% CIs and Electronic Health Records. OASIS is part of the South London and Maudsley (SLaM) NHS trust, the largest European mental health provider, serving a total urban population of 1,358,646 individuals (population aged 16-35: 454,525). Incidence of psychosis in OASIS's catchment area ranges from 58.3 to 71.9 cases per 100,000 person-years, and it is higher than the national average of 41.5 cases per 100,000 person-year. OASIS is a standalone, NHS-funded, multidisciplinary (team leader, consultant and junior psychiatrists, clinical psychologists, mental health professionals), transitional (for those aged 14-35 years) community mental health service with a yearly caseload of 140 CHR-P individuals. OASIS regularly delivers a comprehensive service promotion outreach to several local community organisations. Referrals to OASIS (2366) are made by numerous agencies; about one-third of the referrals eventually met CHR-P criteria. Overall, 600 CHR-P individuals (55.33% males, mean age 22.63 years, white ethnicity 46.44%) have been under the care of the OASIS service: 80.43% met attenuated psychotic symptoms, 18.06% brief and limited intermittent psychotic symptoms and 1.51% genetic risk and deterioration CHR-P criteria. All CHR-P individuals were offered cognitive behavioural therapy and psychosocial support; medications were used depending on individual needs. The cumulative risk of psychosis at ten years was 0.365 (95%CI 0.302-0.437). At six years follow-up, across two-third of individuals non-transitioning to psychosis, 79.24% still displayed some mental health problem, and only 20.75% achieved a complete clinical remission. Research conducted at OASIS encompassed clinical, prognostic, neurobiological and interventional studies and leveraged local, national and international infrastructures; over the past ten years, OASIS-related research attracted about £ 50 million of grant income, with 5,922 citations in the international databases. Future developments may include broadening OASIS to prevent other serious mental disorders beyond psychosis and fostering translational risk prediction and interventional research. With a twenty-years activity, OASIS' cutting-edge quality of preventive care, combined with translational research innovations, consolidated the service as a leading reference model for evidence-based prevention of psychosis worldwide.

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  • CHR-P services represent a successful global template for transitional mental health services and applied clinical research that fully integrate between adolescence and young adulthood.

    “CHR-P services also represent a successful global template for transitional mental health services and applied clinical research 232 that fully integrate between adolescence and young adulthood 67”

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  1. NICE Psychosis and Schizophrenia in Adults: Prevention and Management 2014 National Institute for Clinical Excellence https://www.nice.org.uk/guidance/cg178 32207892

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Authors
Fusar-Poli, P., Spencer, T., De Micheli, A., Curzi, V., Nandha, S., & McGuire, P.
Affiliations
  • King's College London (GB)
  • South London and Maudsley NHS Foundation Trust (GB)
Venue
European Neuropsychopharmacology
Publisher
Elsevier BV
Published
2020-10
Volume
39
Pages
111-122
ISSN
0924-977X (ISSN-L)
OpenAlex
W3085900994
Cited by
57
References
47
Citations by year
2026: 6 · 2025: 10 · 2024: 10 · 2023: 18 · 2022: 5 · 2021: 8
FWCI
5.65
Type
journal article
Language
en
Open access
Locations
  • European Neuropsychopharmacology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (publishedVersion, cc-by)
Funders
Medical Research Council
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Social Sciences › Psychology › Clinical Psychology › Psychiatric care and mental health services
  • Social Sciences › Psychology › Clinical Psychology › Psychopathy, Forensic Psychiatry, Sexual Offending
Keywords
clinical high risk for psychosis, early detection of psychosis, psychosis prevention, service evaluation, psychosis incidence, attenuated psychotic symptoms, cognitive behavioral therapy, psychosocial support, antipsychotic drugs
MeSH terms
Adolescent, Adult, Female, Humans, London, Male, Preventive Medicine, Prognosis, Psychotic Disorders, Referral and Consultation, Risk Factors, Time Factors, Early Diagnosis, Young Adult

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