Auteur M. DI FORTI

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Are reasons for first using cannabis associated with subsequent cannabis consumption (standard THC units) and psychopathology?

E. SPINAZZOLA ; H. DEGEN ; I. AUSTIN-ZIMMERMAN ; G. TROTTA ; E. CHESNEY ; Z. LI ; L. ALAMEDA ; B. M. LEUNG ; Y. LANG ; A. QUATTRONE ; D. QUATTRONE ; E. CASTRIGNANO ; K. WOLFF ; R. MURRAY ; T. P. FREEMAN ; M. DI FORTI | 2025
Dans BMJ Mental Health (Vol.28, n°1, January 2025) Article : Périodique

BACKGROUND: Reasons for first using cannabis (RFUC) may influence later use patterns and mental health outcomes. However, limited research has explored self-medication versus social RFUCs in depth, and their associations with cannabis use patter[...]

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Cannabis withdrawal and psychiatric intensive care

A. MALIK ; H. SHETTY ; D. OLIVER ; T. J. REILLY ; M. DI FORTI ; P. McGUIRE ; E. CHESNEY | 2025
Dans JAMA Psychiatry (Vol.82, n°8, August 2025) Article : Périodique

Key Points: Question: Does cannabis withdrawal increase the risk of admission to psychiatric intensive care? Findings: In psychiatric inpatients, cannabis use prior to admission was associated with an increased risk of admission to intensive c[...]

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Changes in delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta-analysis

T. P. FREEMAN ; S. CRAFT ; J. WILSON ; S. STYLIANOU ; M. ELSOHLY ; M. DI FORTI ; M. T. LYNSKEY | 2021
Dans Addiction (Vol.116, n°5, May 2021) Article : Périodique

BACKGROUND AND AIMS: Cannabis products with high delta-9-tetrahydrocannabinol (THC) concentrations carry an increased risk of addiction and mental health disorders, while it has been suggested that cannabidiol (CBD) may moderate the effects of T[...]

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Effects of continuation, frequency, and type of cannabis use on relapse in the first 2 years after onset of psychosis: an observational study

T. SCHOELER ; N. PETROS ; M. DI FORTI ; E. KLAMERUS ; E. FOGLIA ; O. AJNAKINA ; C. GAYER-ANDERSON ; M. COLIZZI ; D. QUATTRONE ; I. BEHLKE ; S. SHETTY ; P. McGUIRE ; A. S. DAVID ; R. MURRAY ; S. BHATTACHARYYA | 2016
Dans Lancet Psychiatry (The) (Vol.3, n°10, October 2016) Article : Périodique

ENGLISH: Background: Although cannabis use after a first episode of psychosis has been associated with relapse, little is known about the determinants of this most preventable risk factor for relapse of psychosis. Here we aimed to study whether[...]

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Meta-analysis of the association between the level of cannabis use and risk of psychosis

A. MARCONI ; M. DI FORTI ; C. M. LEWIS ; R. M. MURRAY ; E. VASSOS | 2016
Dans Schizophrenia Bulletin (Vol.42, n°5, September 2016) Article : Périodique

ENGLISH: Cannabis use has been reported to induce long-lasting psychotic disorders and a dose-response relationship has been observed. We performed a systematic review of studies that investigate the association between the degree of cannabis c[...]

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Potency of Delta9-tetrahydrocannabinol and other cannabinoids in cannabis in England in 2016: Implications for public health and pharmacology

D. J. POTTER ; K. HAMMOND ; S. TUFFNELL ; C. WALKER ; M. DI FORTI | 2018
Dans Drug Testing and Analysis (Vol.10, n°4, April 2018) Article : Périodique

In 2005 and 2008, studies reported that cannabis in England had become dominated by the sinsemilla (unseeded female) form. The average potency (Delta9-tetrahydrocannabinol [THC] content) of this material had doubled over the previous decade. Can[...]

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Proportion of patients in south London with first-episode psychosis attributable to use of high potency cannabis: a case-control study

M. DI FORTI ; A. MARCONI ; E. CARRA ; S. FRAIETTA ; A. TROTTA ; M. BONOMO ; F. BIANCONI ; P. GARDNER-SOOD ; J. O'CONNOR ; M. RUSSO ; S. A. STILO ; T. R. MARQUES ; V. MONDELLI ; P. DAZZAN ; C. PARIANTE ; A. S. DAVID ; F. GAUGHRAN ; Z. ATAKAN ; C. IYEGBE ; J. POWELL ; C. MORGAN ; M. LYNSKEY ; R. M. MURRAY | 2015
Dans Lancet Psychiatry (The) (Vol.2, n°3, March 2015) Article : Périodique

Background: The risk of individuals having adverse effects from drug use (eg, alcohol) generally depends on the frequency of use and potency of the drug used. We aimed to investigate how frequent use of skunk-like (high-potency) cannabis in sout[...]

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The contribution of cannabis use to variation in the incidence of psychotic disorder across Europe (EU-GEI): a multicentre case-control study

M. DI FORTI ; D. QUATTRONE ; T. P. FREEMAN ; G. TRIPOLI ; C. GAYER-ANDERSON ; H. QUIGLEY ; V. RODRIGUEZ ; H. E. JONGSMA ; L. FERRARO ; C. LA CASCIA ; D. LA BARBERA ; I. TARRICONE ; D. BERARDI ; A. SZOKE ; C. ARANGO ; A. TORTELLI ; E. VELTHORST ; M. BERNARDO ; C. M. DEL-BEN ; P. R. MENEZES ; J. P. SELTEN ; P. B. JONES ; J. B. KIRKBRIDE ; B. P. F. RUTTEN ; L. DE HAAN ; P. C. SHAM ; J. VAN OS ; C. M. LEWIS ; M. LYNSKEY ; C. MORGAN ; R. M. MURRAY ; EU-GEI WP2 Group | 2019
Dans Lancet Psychiatry (The) (Vol.6, n°5, May 2019) Article : Périodique

Background: Cannabis use is associated with increased risk of later psychotic disorder but whether it affects incidence of the disorder remains unclear. We aimed to identify patterns of cannabis use with the strongest effect on odds of psychotic[...]

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Traditional marijuana, high-potency cannabis and synthetic cannabinoids: increasing risk for psychosis

R. M. MURRAY ; H. QUIGLEY ; D. QUATTRONE ; A. ENGLUND ; M. DI FORTI | 2016
Dans World Psychiatry (Vol.15, n°3, October 2016) Article : Périodique

Epidemiological evidence demonstrates that cannabis use is associated with an increased risk of psychotic outcomes, and confirms a dose-response relationship between the level of use and the risk of later psychosis. High-potency cannabis and syn[...]

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