Daily, high‐potency cannabis use linked to first‐episode psychosis

2019 ◽  
Vol 21 (5) ◽  
pp. 1-4
Keyword(s):  
First Episode Psychosis ◽  
Cannabis Use ◽  
First Episode ◽  
High Potency ◽  
Episode Psychosis

scholarly journals Daily use of high-potency cannabis is associated with more positive symptoms in first-episode psychosis patients: the EU-GEI case–control study

2020 ◽  
pp. 1-9 ◽  
Author(s):  
Diego Quattrone ◽  
Laura Ferraro ◽  
Giada Tripoli ◽  
Caterina La Cascia ◽  
Harriet Quigley ◽  
...  
Keyword(s):  
Large Scale ◽  
Negative Symptoms ◽  
First Episode Psychosis ◽  
Cannabis Use ◽  
Positive Symptom ◽  
Psychotic Symptoms ◽  
First Episode ◽  
Psychotic Experiences ◽  
High Potency ◽  
Episode Psychosis

Abstract Background Daily use of high-potency cannabis has been reported to carry a high risk for developing a psychotic disorder. However, the evidence is mixed on whether any pattern of cannabis use is associated with a particular symptomatology in first-episode psychosis (FEP) patients. Method We analysed data from 901 FEP patients and 1235 controls recruited across six countries, as part of the European Network of National Schizophrenia Networks Studying Gene-Environment Interactions (EU-GEI) study. We used item response modelling to estimate two bifactor models, which included general and specific dimensions of psychotic symptoms in patients and psychotic experiences in controls. The associations between these dimensions and cannabis use were evaluated using linear mixed-effects models analyses. Results In patients, there was a linear relationship between the positive symptom dimension and the extent of lifetime exposure to cannabis, with daily users of high-potency cannabis having the highest score (B = 0.35; 95% CI 0.14–0.56). Moreover, negative symptoms were more common among patients who never used cannabis compared with those with any pattern of use (B = −0.22; 95% CI −0.37 to −0.07). In controls, psychotic experiences were associated with current use of cannabis but not with the extent of lifetime use. Neither patients nor controls presented differences in depressive dimension related to cannabis use. Conclusions Our findings provide the first large-scale evidence that FEP patients with a history of daily use of high-potency cannabis present with more positive and less negative symptoms, compared with those who never used cannabis or used low-potency types.

scholarly journals Association of cannabis use with hospital admission and antipsychotic treatment failure in first episode psychosis: an observational study

BMJ Open ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. e009888 ◽  
Author(s):  
Rashmi Patel ◽  
Robin Wilson ◽  
Richard Jackson ◽  
Michael Ball ◽  
Hitesh Shetty ◽  
...  
Keyword(s):  
Observational Study ◽  
Hospital Admission ◽  
Treatment Failure ◽  
First Episode Psychosis ◽  
Cannabis Use ◽  
First Episode ◽  
Antipsychotic Treatment ◽  
Episode Psychosis

Childhood symptoms of inattention–hyperactivity predict cannabis use in first episode psychosis

2011 ◽  
Vol 132 (2-3) ◽  
pp. 171-176 ◽  
Author(s):  
Clifford M. Cassidy ◽  
Ridha Joober ◽  
Suzanne King ◽  
Ashok K. Malla
Keyword(s):  
First Episode Psychosis ◽  
Cannabis Use ◽  
First Episode ◽  
Episode Psychosis

scholarly journals S101. CLINICAL FACTORS ASSOCIATED WITH CANNABIS USE IN A CHILEAN SAMPLE OF FIRST EPISODE PSYCHOSIS PATIENTS

2018 ◽  
Vol 44 (suppl_1) ◽  
pp. S364-S364
Author(s):  
Barbara Iruretagoyena ◽  
Nicolas Crossley ◽  
Alfonso Gonzalez-Valderrama ◽  
Cristian Mena ◽  
Carmen Castañeda ◽  
...  
Keyword(s):  
First Episode Psychosis ◽  
Cannabis Use ◽  
First Episode ◽  
Clinical Factors ◽  
Factors Associated ◽  
Episode Psychosis

Continued Cannabis Use and Outcome in First-Episode Psychosis

2012 ◽  
Vol 73 (05) ◽  
pp. 632-638 ◽  
Author(s):  
Gunnar Faber ◽  
Henderikus G. O. M. Smid ◽  
Arthur R. Van Gool ◽  
Lex Wunderink ◽  
Robert J. van den Bosch ◽  
...  
Keyword(s):  
First Episode Psychosis ◽  
Cannabis Use ◽  
First Episode ◽  
Episode Psychosis

scholarly journals Impact of first episode psychosis treatment on heavy cannabis use: Secondary analysis on RAISE-ETP study

2019 ◽  
Vol 211 ◽  
pp. 86-87 ◽  
Author(s):  
Karl C. Alcover ◽  
Oladunni Oluwoye ◽  
Liat Kriegel ◽  
Sterling McPherson ◽  
Michael G. McDonell
Keyword(s):  
Secondary Analysis ◽  
First Episode Psychosis ◽  
Cannabis Use ◽  
First Episode ◽  
Episode Psychosis
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