The Standard Joint Unit

Kögel, Cristina Casajuana; Balcells‐Oliveró, Mercè; López‐Pelayo, Hugo; Miquel, Laia; Teixidó, Lídia; Colom, Joan; Nutt, David; Rehm, Jürgen; Gual, Antoni

doi:10.1016/j.drugalcdep.2017.03.010

Cited by 46 publications

(25 citation statements)

References 35 publications

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“…Likewise, the definition of high-potency cannabis varied between studies, and actual THC/CBD concentrations of cannabis samples were not assessed. Standardized measures for assessing cannabis use and determining THC/CBD concentrations in cannabis are highly needed for improving the comparison and interpretation of results [114,115]. Third, although the present systematic review provides an up-to-date and detailed overview of the most recent literature, possible differences in the quality of the included studies were not assessed in a systematic way.…”

Section: Discussionmentioning

confidence: 99%

Factors Moderating the Association between Cannabis Use and Psychosis Risk: A Systematic Review

2020

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Increasing evidence indicates a relationship between cannabis use and psychosis risk. Specific factors, such as determinants of cannabis use or the genetic profile of cannabis users, appear to moderate this association. The present systematic review presents a detailed and up-to-date literature overview on factors that influence the relationship between cannabis use and psychosis risk. A systematic search was performed according to the PRISMA guidelines in MEDLINE and Embase, and 56 studies were included. The results show that, in particular, frequent cannabis use, especially daily use, and the consumption of high-potency cannabis are associated with a higher risk of developing psychosis. Moreover, several genotypes moderate the impact of cannabis use on psychosis risk, particularly those involved in the dopamine function, such as AKT1. Finally, cannabis use is associated with an earlier psychosis onset and increased risk of transition in individuals at a clinical high risk of psychosis. These findings indicate that changing cannabis use behavior could be a harm reduction strategy employed to lower the risk of developing psychosis. Future research should aim to further develop specific biomarkers and genetic profiles for psychosis, thereby contributing to the identification of individuals at the highest risk of developing a psychotic disorder.

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Section: Discussionmentioning

confidence: 99%

Factors Moderating the Association between Cannabis Use and Psychosis Risk: A Systematic Review

2020

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“…One impediment to drawing conclusions about these risk factors is the varying measures of cannabis use that different studies employ. Despite growing international interest in this issue, there are currently no agreed standardised measures for assessing cannabis use in research (Yücel et al ., 2016; Hindocha et al ., 2017; Kögel et al ., 2017). Although the majority of studies employ self-report measures (e.g.…”

Section: Introductionmentioning

confidence: 99%

Which biological and self-report measures of cannabis use predict cannabis dependency and acute psychotic-like effects?

et al. 2018

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“…In one of the studies conducted by Pol and colleagues (2013), potency of cannabis was estimated by the user with no confirmation testing to determine accuracy of the estimation. Kögel and colleagues (2017) attempted to define standard joint size by collecting a random sample of joints rolled by users. Limitations include a variety of potency, which has been shown to lead to dose titration (Pol et al, 2013, 2014), and the products being measured included tobacco and were a mix between hash and marijuana.…”

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confidence: 99%

Quantifying cannabis: A field study of marijuana quantity estimation.

Prince

Pearson

2018

Psychology of Addictive Behaviors

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The assessment of marijuana use quantity poses unique challenges. These challenges have limited research efforts on quantity assessments. However, quantity estimates are critical to detecting associations between marijuana use and outcomes. We examined accuracy of marijuana users' estimations of quantities of marijuana they prepared to ingest and predictors of both how much was prepared for a single dose and the degree of (in)accuracy of participants' estimates. We recruited a sample of 128 regular-to-heavy marijuana users for a field study wherein they prepared and estimated quantities of marijuana flower in a joint or a bowl as well as marijuana concentrate using a dab tool. The vast majority of participants overestimated the quantity of marijuana that they used in their preparations. We failed to find robust predictors of estimation accuracy. Self-reported quantity estimates are inaccurate, which has implications for studying the link between quantity and marijuana use outcomes. (PsycINFO Database Record

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The Standard Joint Unit

Cited by 46 publications

References 35 publications

Factors Moderating the Association between Cannabis Use and Psychosis Risk: A Systematic Review

Factors Moderating the Association between Cannabis Use and Psychosis Risk: A Systematic Review

Which biological and self-report measures of cannabis use predict cannabis dependency and acute psychotic-like effects?

Quantifying cannabis: A field study of marijuana quantity estimation.

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