Changes in cannabis potency and cannabis-related psychiatric harms: a 23-year ecological study in Denmark.

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Title: Changes in cannabis potency and cannabis-related psychiatric harms: a 23-year ecological study in Denmark.
Authors: Rømer Thomsen K; Centre for Alcohol and Drug Research, Department of Psychology and Behavioural Sciences, https://ror.org/01aj84f44Aarhus University, Denmark., Thylstrup B; Centre for Alcohol and Drug Research, Department of Psychology and Behavioural Sciences, https://ror.org/01aj84f44Aarhus University, Denmark., Hesse M; Centre for Alcohol and Drug Research, Department of Psychology and Behavioural Sciences, https://ror.org/01aj84f44Aarhus University, Denmark., Lindholst C; Department of Forensic Medicine, https://ror.org/01aj84f44Aarhus University, Denmark., Reitzel LA; Department of Forensic Medicine, https://ror.org/035b05819University of Copenhagen, Denmark., Eriksen TS; Department of Forensic Medicine, https://ror.org/03yrrjy16University of Southern Denmark, Denmark., Erlangsen A; Copenhagen Research Centre for Mental Health, https://ror.org/047m0fb88Mental health services in the Capital Region of Denmark, Denmark.; Department of Mental Health, https://ror.org/00za53h95Johns Hopkins Bloomberg School of Public Health, USA.; Centre for Mental Health Research, National Centre for Epidemiology and Population Health, https://ror.org/019wvm592The Australian National University, Australia., Englund A; Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology, and Neuroscience, King's College London, UK., Freeman TP; Department of Psychology, https://ror.org/002h8g185University of Bath, UK., Hjorthøj C; Copenhagen Research Centre for Mental Health, https://ror.org/047m0fb88Mental health services in the Capital Region of Denmark, Denmark.; Section of Epidemiology, Department of Public Health, https://ror.org/035b05819University of Copenhagen, Denmark.
Source: Psychological medicine [Psychol Med] 2026 May 04; Vol. 56, pp. e124. Date of Electronic Publication: 2026 May 04.
Publication Type: Journal Article
Journal Info: Publisher: Cambridge University Press Country of Publication: England NLM ID: 1254142 Publication Model: Electronic Cited Medium: Internet ISSN: 1469-8978 (Electronic) Linking ISSN: 00332917 NLM ISO Abbreviation: Psychol Med Subsets: MEDLINE
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  Data: Changes in cannabis potency and cannabis-related psychiatric harms: a 23-year ecological study in Denmark.
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  Data: <searchLink fieldCode="AU" term="%22Rømer+Thomsen+K%22">Rømer Thomsen K</searchLink>; Centre for Alcohol and Drug Research, Department of Psychology and Behavioural Sciences, https://ror.org/01aj84f44Aarhus University, Denmark.<br /><searchLink fieldCode="AU" term="%22Thylstrup+B%22">Thylstrup B</searchLink>; Centre for Alcohol and Drug Research, Department of Psychology and Behavioural Sciences, https://ror.org/01aj84f44Aarhus University, Denmark.<br /><searchLink fieldCode="AU" term="%22Hesse+M%22">Hesse M</searchLink>; Centre for Alcohol and Drug Research, Department of Psychology and Behavioural Sciences, https://ror.org/01aj84f44Aarhus University, Denmark.<br /><searchLink fieldCode="AU" term="%22Lindholst+C%22">Lindholst C</searchLink>; Department of Forensic Medicine, https://ror.org/01aj84f44Aarhus University, Denmark.<br /><searchLink fieldCode="AU" term="%22Reitzel+LA%22">Reitzel LA</searchLink>; Department of Forensic Medicine, https://ror.org/035b05819University of Copenhagen, Denmark.<br /><searchLink fieldCode="AU" term="%22Eriksen+TS%22">Eriksen TS</searchLink>; Department of Forensic Medicine, https://ror.org/03yrrjy16University of Southern Denmark, Denmark.<br /><searchLink fieldCode="AU" term="%22Erlangsen+A%22">Erlangsen A</searchLink>; Copenhagen Research Centre for Mental Health, https://ror.org/047m0fb88Mental health services in the Capital Region of Denmark, Denmark.; Department of Mental Health, https://ror.org/00za53h95Johns Hopkins Bloomberg School of Public Health, USA.; Centre for Mental Health Research, National Centre for Epidemiology and Population Health, https://ror.org/019wvm592The Australian National University, Australia.<br /><searchLink fieldCode="AU" term="%22Englund+A%22">Englund A</searchLink>; Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology, and Neuroscience, King's College London, UK.<br /><searchLink fieldCode="AU" term="%22Freeman+TP%22">Freeman TP</searchLink>; Department of Psychology, https://ror.org/002h8g185University of Bath, UK.<br /><searchLink fieldCode="AU" term="%22Hjorthøj+C%22">Hjorthøj C</searchLink>; Copenhagen Research Centre for Mental Health, https://ror.org/047m0fb88Mental health services in the Capital Region of Denmark, Denmark.; Section of Epidemiology, Department of Public Health, https://ror.org/035b05819University of Copenhagen, Denmark.
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  Data: <searchLink fieldCode="JN" term="%221254142%22">Psychological medicine</searchLink> [Psychol Med] 2026 May 04; Vol. 56, pp. e124. <i>Date of Electronic Publication: </i>2026 May 04.
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              Text: 2026 May 04
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