Influence of cannabis use on incidence of psychosis in people at clinical high risk

Author:

Chester Lucy A.1ORCID,Valmaggia Lucia R.2ORCID,Kempton Matthew J.1ORCID,Chesney Edward1ORCID,Oliver Dominic13ORCID,Hedges Emily P.14ORCID,Klatsa Elise1,Stahl Daniel5ORCID,van der Gaag Mark67ORCID,de Haan Lieuwe89ORCID,Nelson Barnaby1011ORCID,McGorry Patrick1011ORCID,Amminger G. Paul1011ORCID,Riecher‐Rössler Anita12ORCID,Studerus Erich13ORCID,Bressan Rodrigo14ORCID,Barrantes‐Vidal Neus15ORCID,Krebs Marie‐Odile16ORCID,Glenthøj Birte17ORCID,Nordentoft Merete18ORCID,Ruhrmann Stephan19ORCID,Sachs Gabriele20ORCID,McGuire Philip13ORCID,

Affiliation:

1. Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

2. Department of Psychology, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

3. Department of Psychiatry Oxford University, Warneford Hospital Oxford UK

4. Department of Forensic and Neurodevelopmental Sciences, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

5. Department of Biostatistics, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

6. Faculty of Behavioural and Movement Sciences, Department of Clinical Psychology and EMGO+ Institute for Health and Care Research VU University Amsterdam The Netherlands

7. Department of Psychosis Research Parnassia Psychiatric Institute The Hague The Netherlands

8. Department Early Psychosis Amsterdam UMC Amsterdam The Netherlands

9. Arkin Amsterdam Amsterdam The Netherlands

10. Centre for Youth Mental Health University of Melbourne Parkville Victoria Australia

11. Orygen Parkville Victoria Australia

12. Faculty of Medicine University of Basel Basel Switzerland

13. Department of Psychology, Division of Personality and Developmental Psychology University of Basel Basel Switzerland

14. LiNC—Lab Interdisciplinar Neurociências Clínicas, Depto Psiquiatria, Escola Paulista de Medicina Universidade Federal de São Paulo – UNIFESP Sao Paulo Brazil

15. Departament de Psicologia Clínica i de la Salut Universitat Autònoma de Barcelona, Fundació Sanitària Sant Pere Claver (Spain), Spanish Mental Health Research Network (CIBERSAM) Barcelona Spain

16. Hôpital Sainte‐Anne, C'JAAD, Service Hospitalo‐Universitaire, Inserm U894, Institut de Psychiatrie (CNRS 3557) University Paris Descartes Paris France

17. Centre for Neuropsychiatric Schizophrenia Research (CNSR) & Centre for Clinical Intervention and Neuropsychiatric Schizophrenia Research (CINS), Mental Health Centre Glostrup University of Copenhagen Glostrup Denmark

18. Mental Health Center Copenhagen and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, CINS, Mental Health Center Glostrup, Mental Health Services in the Capital Region of Copenhagen University of Copenhagen Kobenhavn Denmark

19. Department of Psychiatry and Psychotherapy, Faculty of Medicine and University Hospital University of Cologne Cologne Germany

20. Department of Psychiatry and Psychotherapy Medical University of Vienna Wien Austria

Abstract

AimsEvidence for case–control studies suggests that cannabis use is a risk factor for the development of psychosis. However, there have been limited prospective studies and the direction of this association remains controversial. The primary aim of the present study was to examine the association between cannabis use and the incidence of psychotic disorders in people at clinical high risk of psychosis. Secondary aims were to assess associations between cannabis use and the persistence of psychotic symptoms, and with functional outcome.MethodsCurrent and previous cannabis use were assessed in individuals at clinical high risk of psychosis (n = 334) and healthy controls (n = 67), using a modified version of the Cannabis Experience Questionnaire. Participants were assessed at baseline and followed up for 2 years. Transition to psychosis and persistence of psychotic symptoms were assessed using the Comprehensive Assessment of At‐Risk Mental States criteria. Level of functioning at follow up was assessed using the Global Assessment of Functioning disability scale.ResultsDuring follow up, 16.2% of the clinical high‐risk sample developed psychosis. Of those who did not become psychotic, 51.4% had persistent symptoms and 48.6% were in remission. There was no significant association between any measure of cannabis use at baseline and either transition to psychosis, the persistence of symptoms, or functional outcome.ConclusionsThese findings contrast with epidemiological data that suggest that cannabis use increases the risk of psychotic disorder.

Funder

FP7 Ideas: European Research Council

Medical Research Centre

NIHR Maudsley Biomedical Research Centre

Publisher

Wiley

Subject

Psychiatry and Mental health,Neurology (clinical),Neurology,General Medicine,General Neuroscience

全球学者库

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"全球学者库"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前全球学者库共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2023 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3