The impact of cannabis use on age of onset and clinical characteristics in first-episode psychotic patients. Data from the Psychosis Incident Cohort Outcome Study (PICOS)

Tosato, Sarah; Lasalvia, Antonio; Bonetto, Chiara; Mazzoncini, Rodolfo; Cristofalo, Doriana; Santi, Katia De; Bertani, Mariaelena; Bissoli, Sarah; Lazzarotto, Lorenza; Marrella, Giovanna; Lamonaca, Dario; Riolo, Rosanna; Gardellin, Francesco; Urbani, A. M.; Tansella, Michele; Ruggeri, Mirella

doi:10.1016/j.jpsychires.2012.11.009

Cited by 64 publications

(46 citation statements)

References 37 publications

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“…Problematic substance has also been found to be a factor contributing to poor functioning in individuals with Table 2 Results of regression univariable analysis of effect of single predictors on the functional outcome; C: converted; HR-GF: not converted good functional outcome; HR-PF: not converted poor functional outcome; CAARMS-T: CAARMS total scores; GAF BL: GAF baseline. *p < 0.05; **p < 0.005. psychosis (Di Forti et al, 2009;Tosato et al, 2013). Paradoxically in HR lifetime cannabis users and abusers had higher social functioning scores at follow-up than those who had never used or abused of it (Auther et al, 2012).…”

Section: Limitationsmentioning

confidence: 98%

Predictors of functional outcome in individuals at high clinical risk for psychosis at six years follow-up

Brandizzi

Valmaggia

Byrne

et al. 2015

Journal of Psychiatric Research

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Section: Limitationsmentioning

confidence: 98%

Predictors of functional outcome in individuals at high clinical risk for psychosis at six years follow-up

Brandizzi

Valmaggia

Byrne

et al. 2015

Journal of Psychiatric Research

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“…The psychometric properties of this instrument have been established 21 and the CEQ has been used extensively to assess substance use in people with schizotypy 21 ; at risk mental state for psychosis 19 , and psychosis 18,22,23 . figure 1 contains a definition of the substances assessed.…”

Section: Substance Usementioning

confidence: 99%

“…We were particularly interested not just in assessing the use of substances, but also the characteristics of substance use associated with poorer health outcomes in community samples, such as age of first use, recent use, and poly-drug use [16][17][18][19] . Our secondary aim was to investigate the association between these characteristics and screening positive on the Prodromal Questionnaire Brief version.…”

Section: Introductionmentioning

confidence: 99%

Substance use and at‐risk mental state for psychosis in 2102 prisoners: the case for early detection and early intervention in prison

Cooper

Jarrett

Forrester

et al. 2016

Early Intervention Psych

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AimPrisoners exhibit high rates of substance use and mental health problems. In the present study we sought to gain detailed understanding of substance use among young prisoners to inform early detection and early intervention strategies in a prison setting. MethodsThis is a cross-sectional study of 2,102 prisoners who were screened by the London Early detection And Prevention in prison team (LEAP). Data on the use of substances were collected including age of first use, recent use, duration of use and poly-drug use. The Prodromal Questionnaire Brief version was used to screen for the at risk mental state. ResultsWe found high rates of lifetime and recent use and low age of first use of a number of substances. We also found strong associations between substance use and screening positive for an at risk mental state. Logistic regression analysis confirmed that use of any drug in the last year, poly-drug and early use, as well as heavy alcohol use, were related to an increased risk of screening positive. ConclusionsSubstance use in the prison population is not only widespread and heavy but is also strongly linked with a higher risk of developing mental health problems. The need for early detection and early intervention in prison is discussed.

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“…In a systematic review, it has been reported that cannabis users who also smoke tobacco are more dependent on cannabis, have more psychosocial problems, and have poorer cessation outcomes than those who use cannabis but not tobacco (Peters, Budney, & Carroll, 2012); and a separate review concluded that some mechanisms linking cannabis and tobacco are distinct from those contributing to co-occurring drug use in general (Agrawal, Budney, & Lynskey, 2012). Finally, there has been a surge of research in recent years that has demonstrated not only robust links between cannabis use and risk of subsequent psychosis, but also a possible causal role of cannabis use in the development of psychosis among a subset of vulnerable individuals (Barkus & Murray, 2010;Dekker et al, 2012;Di Forti et al, 2012;Galvez-Buccollini et al, 2012;Griffith-Lendering, Wigman, van Leeuwen, Huijbregts, & Huizink, 2013;Large, Sharma, Compton, Slade, & Nielsson, 2011;Manrique-Garcia et al, 2012;Moore et al, 2007;Tosato et al, 2013).…”

Section: June 2007 Using International Classification Of Diseases (Imentioning

confidence: 99%

Recovery from cannabis use disorders: Abstinence versus moderation and treatment-assisted recovery versus natural recovery.

Stea

Yakovenko

Hodgins

2015

Psychology of Addictive Behaviors

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The recovery process from cannabis use disorders has received little empirical attention. Understanding how and the ways in which individuals with cannabis use disorders recover may help to improve formal treatments and facilitate recovery for those who wish to not seek treatment. The present study was undertaken with two primary objectives in mind. The first primary objective was to provide an exploratory portrait of the recovery process from cannabis use disorders from the perspective of individuals who have recovered. The second primary objective was to explore and systematically describe the similarities and differences between abstinence-and moderation-oriented recoveries, as well as the similarities and differences between treatment-assisted and natural recoveries. The methodology was largely borrowed from the natural recovery literature insofar as recovery was first inferred via the remission of diagnostic symptoms, and then explored predominantly via several interview domains (e.g., reasons for resolution, actions taken to recover, maintenance factors, barriers to treatment seeking).Several interesting and important findings emerged at the level of the total sample (N = 119), as well as at the level of group comparisons between the different recovery pathways. Notably, the findings lend further support to the effectiveness of cognitive, motivational, and behavioural strategies as helpful actions and maintenance factors

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The impact of cannabis use on age of onset and clinical characteristics in first-episode psychotic patients. Data from the Psychosis Incident Cohort Outcome Study (PICOS)

Cited by 64 publications

References 37 publications

Predictors of functional outcome in individuals at high clinical risk for psychosis at six years follow-up

Predictors of functional outcome in individuals at high clinical risk for psychosis at six years follow-up

Substance use and at‐risk mental state for psychosis in 2102 prisoners: the case for early detection and early intervention in prison

Recovery from cannabis use disorders: Abstinence versus moderation and treatment-assisted recovery versus natural recovery.

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