Problematic Cannabis Research Articles

Associations between modes of cannabis use in daily life with concurrent and longitudinal hazardous use and consequences

BackgroundAs diverse cannabis use patterns among recreational users continue to evolve, little is known about how modes of use may contribute to long-term risk. The current study examined the association between types and number of modes of cannabis used over a 21-day ecological momentary assessment (EMA) period with hazardous cannabis use and consequences both concurrently and six months later. MethodsA sample of 155 young adult recreational cannabis users, aged 18–30 (M = 21.1), reported on cannabis use patterns over 21-days, and completed baseline and six-month assessments of hazardous cannabis use and cannabis consequences. ResultsAt baseline, more frequent bowl use was associated with hazardous cannabis use and cannabis consequences. More frequent use of hash-oil was associated with more consequences at six months, while a greater proportion of hash-oil use relative to total use was associated with increased risk for hazardous cannabis use at six months. ConclusionWhile bowl use is characteristic of concurrent problematic use and consequences, only hash-oil predicted increased risk for hazardous use and consequences later. It may be that more frequent use of high-potency cannabis products, such as hash-oil, present unique risks for cannabis problems and consequences.

Quantifying cannabis problems among college students from English and Spanish speaking countries: Cross-cultural validation of the Cannabis Use Disorders Identification Test-Revised (CUDIT-R)

ObjectiveThe Cannabis Use Disorders Identification Test - Revised (CUDIT-R) is a broadly employed measure of cannabis-related problems. However, minimal research has tested the measurement invariance of the CUDIT-R among youths from different countries, hindering cross-national comparisons. Thus, the present study aimed to test the measurement invariance of the CUDIT-R between seven countries and gender groups, and provide different sources of reliability and validity evidence of the scale. MethodsA sample of 4,712 college student lifetime cannabis users (mean age = 20.57, SD = 3.97; 70.4% females) from seven countries completed the CUDIT-R. Last 30-day cannabis users (n = 2402; mean age = 20.09, SD = 3.18; 67.7% females) additionally completed another measure of cannabis-related problems, and measures of cannabis frequency, quantity and motives. ResultsMultigroup analysis showed configural (equal number of factors and pattern of factor-indicator relationships), metric (equal factor loadings) and scalar (equal thresholds) invariance of the CUDIT-R across five countries and across gender in the sample of lifetime cannabis users. Cronbach’s alphas and ordinal omegas ranked from .72 and .85. Large correlations were found between the CUDIT-R and another cannabis-related problem scale. Small to large associations were found between the CUDIT-R and other criterion variables (frequency and quantity of consumption and cannabis-related motives) providing convergent and discriminant validity evidence. Only a few differences in the magnitude of the correlations across countries were found. ConclusionsThe results suggest that the CUDIT-R is a suitable measure to assess cannabis-related problems among college student from the U.S., Canada, South Africa, Spain, and Argentina and across gender groups.

An experimental investigation of peer rejection and social anxiety on alcohol and cannabis use willingness: Accounting for social contexts and use cues in the laboratory.

Evidence suggests that social anxiety (SA) is a risk factor for problematic alcohol and cannabis use, particularly during states of social stress. Unfortunately, laboratory studies to date have overlooked decision-making mechanisms (e.g., use willingness) and contextual features of commonly used social stress tasks that may clarify what is driving these links. The current study begins to address this gap by testing the effects of SA and laboratory-induced peer rejection on acute alcohol and cannabis use willingness within a simulated party setting. 80 emerging adults (18-25 years; 70% women) endorsing lifetime alcohol and cannabis use were randomly assigned to experience rejection or neutral social cues. They rated their willingness to use alcohol and cannabis before and after cue exposure within the simulated party. A hierarchical regression tested the main and interaction effects of SA symptoms and experimental condition (Rejection vs. Neutral) on alcohol and cannabis use willingness, controlling for past-year use frequency and willingness to accept any offers (e.g., food and nonalcoholic drinks). There were statistically significant main (but not interaction) effects of SA and experimental condition on cannabis use willingness. Higher SA and Rejection exposure were each associated with greater cannabis use willingness. There were neither main nor interaction effects on alcohol willingness. Results suggest that elevated SA increases cannabis use willingness across social contexts, regardless of Rejection exposure, while Rejection exposure increases use willingness similarly across levels of SA. Together, findings reinforce the need to consider social-contextual factors and polysubstance use in laboratory settings. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Social Context of Cannabis Use: Associations with Problematic Use, Motives for Use, and Protective Behavioral Strategies among Sexual Minorities Assigned Female at Birth.

Sexual and gender minorities assigned female at birth (SGM-AFAB) are at heightened risk for problematic cannabis use compared to heterosexual cisgender women. Despite evidence that social context influences patterns of substance use, no known studies have examined context of cannabis use among SGM-AFAB. The current study examined two aspects of social contexts of cannabis use (locations and companions) and their associations with problematic use, motives for use, and protective behavioral strategies among SGM-AFAB. We utilized three waves of data from 358 SGM-AFAB from a larger study. We aimed to: (1) identify subgroups of SGM-AFAB based on contexts in which they used cannabis; (2) examine changes in contexts over time; and (3) examine associations between contexts, problematic use, motives for use, and protective behavioral strategies. Using latent class analysis, we identified four classes: those who used cannabis at home; those who used with friends; those who used alone and with friends; and those who used in all contexts. Those who used in all contexts reported more problematic use, higher coping motives, and used fewer protective behavioral strategies compared to other classes. Transitioning to using cannabis in fewer contexts was associated with a subsequent decrease in problematic use. Classes that were most stable over time (using in all contexts or alone and with friends) were also those that were associated with more problematic use. Social context has important implications for problematic cannabis use among SGM-AFAB. As such, interventions may benefit from attending to social context to reduce problematic use in this population.

The association between age of initiation and current blunt use among adults: Findings from the national survey on drug use and health, 2014–2019

BackgroundInitiating cannabis use at a young age has been linked to problematic and continued cannabis use in adulthood. Given that approximately 1 in 3 adult cannabis smokers report blunt use, it is important to determine if and how age of blunt initiation is associated with current blunt use among adult blunt smokers. MethodsThis study uses cross-sectional pooled data from the 2014–2019 National Survey on Drug Use and Health (NSDUH) to examine the association between age of blunt initiation and current blunt use among 62,020 adults who reported lifetime blunt use. ResultsAmong lifetime blunt smokers, 51.4% initiated blunt use at 18 years or older, 42.1% initiated blunt use at 14–17 years old and 6.5% initiated blunt use at 13 years or younger. Multivariable logistic regression models revealed that odds of past 12-month (aOR: 1.58; 95% CI: 1.45 – 1.72), past 30-day (aOR: 2.58; 95% CI: 2.37 – 2.80) and daily (aOR: 3.17; 95% CI: 2.61 – 3.86) blunt use were greater among adults who initiated blunt use at 13 years of age or younger relative to those who initiated blunt use at 18 years of age or older, controlling for covariates. ConclusionsEarly onset of blunt use among adolescents is associated with current blunt use in adulthood among lifetime blunt users. Given the adverse health effects associated with blunt use and the prevalence of adult cannabis users who report blunt use, cannabis interventions and policies should be expanded to target blunt use among early initiators.

Alcohol Use Disorders among Slovak and Czech University Students: A Closer Look at Tobacco Use, Cannabis Use and Socio-Demographic Characteristics.

The main objective of the research was to examine the associations between problematic alcohol use, tobacco use and cannabis use among Czech and Slovak university students during the early COVID-19 pandemic. The research sample consisted of 1422 participants from the Czech Republic (CZ) and 1677 from the Slovak Republic (SK). The analyses included university students who drank alcohol in the past year (CZ: 1323 (93%); SK: 1526 (91%)). Regarding the analysed measures, the Alcohol Use Disorders Identification Test (AUDIT) and its subscales, the Glover-Nilsson Smoking Behavioral Questionnaire (GN-SBQ) and the Cannabis Abuse Screening Test (CAST) were selected to identify substance-related behaviour. Age, gender and residence were included in the analyses as socio-demographic variables. Correlation and regression analyses were used to achieve the main objective of the research. The main results revealed that the use of tobacco and cannabis were positively associated with alcohol use disorders among Czech and Slovak university students. Additionally, males were more likely to report alcohol use disorders. In the Czech Republic, it was found that students living in dormitories were characterized by a lower AUDIT score. The opposite situation was found in the Slovak Republic. Czech and Slovak policy-makers are encouraged to develop alcohol use prevention programs for university students in line with these findings.

Public health monitoring of cannabis use in Europe: prevalence of use, cannabis potency, and treatment rates.

BackgroundCannabis is one of the most widely used substances worldwide. Heavy use is associated with an increased risk of cannabis use disorders, psychotic disorders, acute cognitive impairment, traffic injuries, respiratory problems, worse pregnancy outcomes, and there are indications for genotoxic and epigenotoxic adverse effects. International regulation of medical and non-medical cannabis use is changing rapidly and substantially, highlighting the importance of robust public health monitoring. This study aimed to describe the trends of key public health indicators in European Union (27 member states + UK, Norway and Turkey) for the period 2010 to 2019, their public health implications, and to identify the steps required to improve current practice in monitoring of cannabis use and harm in Europe.MethodsData on four key cannabis indicators (prevalence of use, prevalence of cannabis use disorder [CUD], treatment rates, and potency of cannabis products) in Europe were extracted from the United Nations Office on Drugs and Crime, European Monitoring Centre for Drugs and Drug Addiction and the Global Burden of Disease study. For prevalence of use and CUD, the first and last available estimate in each country were compared. For treatment rates and cannabis potency, linear regression models were conducted.FindingsBetween 2010 and 2019, past-month prevalence of cannabis use increased by 27% in European adults (from 3·1 to 3·9%), with most pronounced relative increases observed among 35-64 year-olds. In 13 out of 26 countries, over 20% of all past-month users reported high-risk use patterns. The rate of treatment entry for cannabis problems per 100,000 adults increased from 27·0 (95% CI: 17·2 to 36·8) to 35·1 (95% CI: 23·6 to 46·7) and has mostly plateaued since 2015. Modest increases in potency were found in herbal cannabis (from 6·9% to 10·6% THC) while median THC values tripled in cannabis resin (from 7·6% to 24·1% THC).InterpretationIn the past decade, cannabis use, treatment rates and potency levels have increased in Europe highlighting major concerns about the public health impact of cannabis use. Continued monitoring and efforts to improve data quality and reporting, including indicators of high-risk use and cannabis-attributable harm, will be necessary to evaluate the health impact of international changes in cannabis regulation.FundingThis study received no specific funding.

Attitudes and beliefs about recreational cannabis legalization among cannabis-using young adults in Los Angeles: Impact on concurrent cannabis practices and problematic cannabis use

BackgroundThis study investigated differences in attitudes and beliefs about recreational cannabis legalization (RCL) among cannabis-using young adults comprised of medical cannabis patients (MCP) and non-patient users (NPU). We further investigated whether these variations are associated with concurrent cannabis practices and problematic use. MethodCannabis-using young adults (N = 301) were interviewed between 2017 and 2018 – after RCL and through the early months after storefront sales began. Latent class analysis empirically derived groups based on participants’ attitudes/beliefs about the impact of RCL. Socio-demographic factors, patient status, medicinal and/or recreational use, and social norms differentiated latent class memberships, while concurrent cannabis practices and problematic use served as distal outcomes. The manual Bolck, Croon, and Hagenaars (BCH) three-step process modeled all covariates and distal outcomes simultaneously in the final LCA solution. ResultsThree patterns emerged: Impacted (RCL had broad impact on attitudes/beliefs) (n = 113), Partially-Impacted (RCL had some impact on attitudes/beliefs) (n = 131) and Neutral (RCL had no/limited impact) (n = 57). MCP were more likely to be Neutral than Partially-Impacted users while those who reported recreational cannabis use were more likely to be Impacted than Neutral users. Class membership predicted cannabis practices and problematic use with Impacted individuals reporting the greatest recent days of use, number of hits per day, and highest scores in problematic cannabis use compared to Partially-Impacted and Neutral users. ConclusionVariability in attitudes/beliefs about RCL served as strong drivers of concurrent cannabis practices and problematic use. Findings provide an important baseline for tracking attitudes/beliefs’ long-term health and substance use impact as retail cannabis sales evolve.

Prospective effects of loneliness on frequency of alcohol and marijuana use

BackgroundLoneliness is a widespread problem, with demonstrated negative health effects. However, prospective data on the relationship between loneliness and problematic substance use are lacking, and few studies have examined specific commonplace substances, such as alcohol and cannabis. This study used prospective data from a community sample of US adults with problematic alcohol or cannabis use to examine whether loneliness was a predictor of subsequent increased substance use. MethodsParticipants (N = 210) were recruited between 05/2016–06/2019 from a New York City medical center. At baseline, 3-month, and 6-month follow-ups, participants completed identical computerized questionnaires. We used generalized estimating equations to assess the average effect of past 2-week loneliness on subsequent number of days of alcohol or cannabis use, controlling for baseline days of use, demographic characteristics, and past 2-week DSM-5 depression. ResultsCompared with individuals who were never lonely, participants with moderate or severe loneliness had a significantly higher frequency of alcohol or cannabis use at the subsequent assessment (β = 0.25 95% CI: 0.08–0.42). ConclusionIndividuals experiencing loneliness at least a few times in the past 2 weeks reported more days of subsequent alcohol or cannabis use compared with individuals who were not lonely. This is cause for concern, as national surveys of US adults indicate increasing rates of loneliness, depression and substance use during the COVID-19 pandemic. These results suggest the need for health care providers to screen for feelings of loneliness and potentially harmful coping behaviors such as substance use, and to offer healthier alternative coping strategies.

Repetitive negative thinking, metacognitive beliefs, and their interaction as possible predictors for problematic cannabis use

The metacognitive formulation of addictive behaviours considers repetitive negative thinking (RNT) and metacognitive beliefs as two important processes involved in the development and maintenance of addictive behaviours. To date, very limited research has investigated the implication of these processes in problematic cannabis use. The present study was aimed at exploring the association between RNT, metacognitive beliefs, and cannabis use in a sample of 157 problematic cannabis users. Participants were administered measures of cannabis use severity, RNT, metacognitive beliefs, anxiety, and depression. Multiple regression analysis showed that metacognitive beliefs (cognitive confidence, beliefs about the need to control thought, and cognitive self-consciousness) were independent predictors of problematic cannabis use and related problem severity when controlling for RNT and negative affect (anxiety and depression). Furthermore, RNT predicted problematic cannabis use severity only for users with low levels of negative beliefs about thoughts concerning uncontrollability and danger. These data suggest that metacognitive beliefs and RNT may be two relevant cognitive processes for understanding problematic cannabis use. More generally, it enables the consideration of cannabis use from the perspective of self-regulation theories, and more specifically cognitive regulation, thus offering several theoretical and clinical implications.

Getting high to cope with COVID-19: Modelling the associations between cannabis demand, coping motives, and cannabis use and problems

During the COVID-19 pandemic, people may use substances like cannabis for enhancement or coping purposes. Behavioral economic demand for a substance is a key determinant of its use and misuse and can be measured via hypothetical purchase tasks. Previous research suggests that motivations to use a substance play a mediational role between elevated substance demand and problems, but comparable mechanistic research has yet to be done in the COVID-19 context and on the effects of cannabis demand on cannabis use patterns. Participants (n = 137) were recruited via the online crowdsourcing platform Prolific. Participants completed measures of cannabis use and problems, motivations for cannabis use, and the Marijuana Purchase Task. Two indices of demand, Persistence (i.e., sensitivity to increasing cost of cannabis) and Amplitude (i.e., consumption of cannabis at unrestricted cost), were related to increased cannabis problems via the use motive of coping during the COVID-19 pandemic. This model did not support the mediational role of enhancement motives. Those with increased cannabis demand who tend to use cannabis to cope are at increased risk of experiencing negative cannabis-related consequences during the COVID-19 pandemic.

Social anxiety and risky Marijuana use: The role of underutilization of protective behavioral strategies

Social anxiety is a common mental health problem that increases the risk of experiencing cannabis-related problems. In fact, social anxiety more than quadruples the risk of developing cannabis use disorder, yet it is inconsistently related to more cannabis use. Inconsistent findings may be due to lack of attention to protective behavioral strategies (PBS) among socially anxious cannabis users. PBS are cognitive-behavioral strategies to reduce cannabis use and related problems. Yet socially anxious persons may be less likely to use PBS for a variety of reasons (e.g., fear of negative evaluation for engaging in behaviors to reduce use), leading to heavier or more frequent use and related problems. The current study examined the mediating role of PBS in the relationships of social anxiety with past-month cannabis use and related problems among current (past-month) cannabis users (N = 102). Social anxiety was significantly positively related to past-month cannabis problems, but not directly related to cannabis use. Social anxiety was significantly negatively related to PBS. Social anxiety was indirectly (via PBS) related to more frequent use, greater peak use, and more cannabis problems. Serial mediation analyses indicated that social anxiety was indirectly related to more cannabis problems via the serial effects of PBS and cannabis use variables. Findings suggest that socially anxious persons may be vulnerable to heavier cannabis use and more cannabis problems due to PBS underutilization. Treatment implications are discussed.

Within-person associations between romantic involvement and mental health among sexual and gender minorities assigned female-at-birth.

Sexual and gender minorities assigned female at birth (SGM-AFAB) experience significant mental health disparities, making it important to identify protective factors against psychological and substance use problems in this population. We examined whether romantic relationship involvement, a well-established protective factor for mental health in heterosexual adults, is protective for SGM-AFAB young people. Using five waves of data from 488 racially diverse SGM-AFAB (ages 16-31 years at baseline), we assessed within-person associations between relationship involvement and depressive symptoms, anxiety symptoms, and problematic alcohol and cannabis use. We tested for differences in these associations by age; sexual, gender, and racial identity; relationship status; and partner gender, and whether romantic involvement buffers the negative effects of anti-SGM victimization. Multilevel models indicated that participants reported fewer depressive symptoms, alcohol use problems, and cannabis use problems when romantically involved than when single. Romantic involvement was associated with fewer anxiety symptoms for Latinx participants only. Associations did not differ by age and were generally consistent (with some exceptions) across sexual, gender, and racial identity. Effects on substance use were stronger for long-term commitments than dating relationships. Participants reported less depression and anxiety, but more alcohol or cannabis use, when romantically involved with cisgender women than with cisgender men or gender minority partners. Together, findings suggest that relationship involvement is broadly protective of mental health among SGM-AFAB, though it may not buffer the negative effects of SGM victimization. Efforts to reduce SGM-AFAB mental health disparities should consider including strategies to support healthy relationship involvement. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

The effect of next day responsibilities and an adaptive purchase task on cannabis demand

BackgroundThe marijuana purchase task (MPT) is a commonly used behavioral economic measure of relative cannabis value (i.e. demand) that presents specific methodological concerns due to non-standardized measurement, variability in modality of use, and evolving legalization policies. Refinement of the task is critical to improve task ecological validity and accurate measurement of cannabis demand. The present study examined the construct validity of an adaptive MPT that allowed for participant selection of their preferred cannabis-based product and unit of measurement and the effect of next-day responsibilities on demand. MethodsParticipants reporting at least monthly cannabis use (N = 186, 40.3 % women, Mage = 33.59) were recruited via Amazon Mechanical Turk and completed the original MPT and our adaptive form with 2 next-day responsibilities scenarios (no responsibilities vs. morning job interview) for each MPT. Cannabis use motives, problems, and risk for cannabis use disorder were also assessed. ResultsCannabis demand was sensitive to next-day responsibility, with higher hypothetical consumption observed in the no responsibilities condition. Responsibility-related decreases in Omax (F(1,185) = 4.83, p = .029, η2p = .03) were significantly greater on the adaptive MPT than the original MPT. Demand indices derived from the adaptive MPT were significantly correlated with cannabis problems (rbreakpoint = .19, rPmax = 0.18, relasticity=-0.18) and motives (rrange=-.32−.25), and demand metrics from the original MPT. ConclusionsResults provide preliminary support for the construct validity of an adaptive MPT and suggest that early-morning work responsibilities may reduce cannabis demand. Continued research is needed to further refine this task and determine implications for cannabis use disorder intervention and prevention approaches.

Risky decision-making as an antecedent or consequence of adolescent cannabis use: findings from a 2-year longitudinal study.

Although poor decision-making (DM) has been correlated with problematic cannabis use (CU), cross-sectional designs make it difficult to determine whether poor DM represents an antecedent and/or consequence of CU. The current study measured bidirectional associations between CU and DM among adolescents over 2years and compared these findings to those observed with episodic memory, which is consistently reported as a consequence of CU. We also measured the role of DM as a risk factor for cannabis use disorder (CUD) onset. Two-year longitudinal study with five bi-annual assessments. Participants were 401 adolescents aged 14-17years at baseline. Miami, Florida, USA. CU frequency and CUDs were assessed at each time-point through the Drug Use History Questionnaire and Structured Clinical Interview for DSM-IV, respectively. Neurocognition was assessed at odd time-points throughout the Iowa Gambling Task, Game of Dice Task and Cups Task [decision-making (DM)] and the Wechsler Memory Scale IV and California Verbal Learning Test II (episodic memory). We used latent growth curve modeling to examine bidirectional influences between CU and neurocognition over time. We applied discrete time survival analyses to determine whether baseline DM predicted CUD onset. Greater lifetime CU frequency was associated with poorer episodic memory at baseline (bs=-14.84, -16.44, Ps=0.038, 0.021). Greater CU escalation predicted lesser gains in immediate episodic memory (b=-0.05, P=0.020). Baseline DM did not predict CU escalation (b=0.07, P=0.421), nor did escalation in CU predict changes in DM (b=0.02, P=0.352). Baseline DM also did not predict CUD onset (adjusted OR=1.01, 95% confidence interval=0.98-1.06). This study replicates findings that poorer episodic memory in adolescents appears to be a consequence of cannabis use, even among adolescents at earlier stages of use. Poor decision-making does not appear to be either a consequence of or a risk factor for escalating cannabis use or onset of cannabis use disorder among adolescents.

The Effects of Cannabis Use Frequency and Episodic Specificity Training on the Recall of Specific and Rewarding Events.

Background: Growing evidence implicates subjective episodic memory, the retrieval of detailed, integrated, and personally relevant past events, as a marker of cognitive vulnerability in mental disorders. Frequent and problematic cannabis use is associated with deficits in objective episodic memory (verbal memory), but the relationship between subjective episodic memory deficits and frequency of cannabis use is unknown. Further, whether a brief intervention designed to enhance the specificity of event retrieval, such as the Episodic Specificity Induction (ESI), might effectively target such deficits among regular cannabis users is unexamined. This study was designed to examine subjective episodic memory as a potential marker of cognitive vulnerability among frequent cannabis users.Methods: Active cannabis users (n = 133) recruited from Amazon Mechanical Turk or Qualtrics Panels were randomized to receive an ESI-control or ESI session and were separated into those who used cannabis 1–25 days in the past month (low to moderate frequency group) and those who used 26–30 days (high frequency group), which facilitated a low to moderate use/ESI-control group (n = 78), low to moderate use/ESI group (n =15), high-use/ESI-control group (n = 20), and high-use/ESI group (n = 20). Following the ESI or ESI-control intervention, participants selected four, positive events from the prior day, described the who, what, and where of the events, and rated how specific (vividness) and rewarding (enjoyable, importance, and exciting) each event was on a 0–100 scale. Four two-way ANCOVAs (demographics and problematic cannabis use covariates) were performed to examine the effects of frequency of cannabis use group and ESI group on the specificity and reward ratings.Results: Lower vividness and excitement ratings were reported for those with high relative to low to moderate cannabis use frequency patterns (p < 0.05). Those who received ESI reported greater vividness, excitement, and importance ratings than the ESI-control group (p < 0.01). No significant interactions between frequency and ESI were found.Conclusion: Findings from the current exploratory study provide initial evidence suggesting that more frequent cannabis use may be associated with the retrieval of less specific and rewarding events relative to less frequent users. Further, ESI may improve such deficits. Future studies that recruit larger and more clinically serious samples of cannabis users appear warranted.

Substance use screening and rates of treatment referral among justice-involved youth

BackgroundJustice-involved youth report high rates of substance use and related problems that are associated with treatment needs; however, data on screening and linkage to treatment within the justice system is lacking. To further inform the juvenile justice behavioral health cascade of care, this study examined factors associated with identified problematic substance use and treatment referral using two screening tools. MethodAs part of a family court intake process, 348 justice-involved youth received two screening measures, the MAYSI-2 alcohol/drug use subscale and the CRAFFT. Both tools are designed to indicate early warning signs of substance use problems and signal referral for further clinical evaluation or treatment. Chart review analysis examined whether demographic variables (sex & race), severity of use, and type of substance used were associated with positive screens on either or both measures and subsequent treatment referral. ResultsHalf (51.2%) of youth were identified as having problematic substance use (a positive screen) on at least one of the screeners. Overall, 38.5% positively screened on the CRAFFT with only 0.3% positively screening on just the MAYSI-2 alcohol/drug scale. Cannabis only users were less likely to positively screen on the MAYSI-2 compared to youth who reported use of both alcohol and cannabis. Positively screening on one versus both screeners was not associated with referral, yet many (28%) who positively screened were not referred for services. ConclusionsThe CRAFFT may be more accurate at identifying youth specifically at risk for problematic cannabis use compared to the MAYSI-2 alcohol/drug subscale. Regardless of tool used, treatment referral was low, highlighting the need for accurate identification of treatment needs of substance-using, justice-involved youth. Interventions to facilitate referrals for youth with problematic substance use are needed.

The association of type of cannabis product used and frequency of use with problematic cannabis use in a sample of young adult cannabis users

Research exploring patterns and predictors of problematic cannabis use behaviors among young adults is limited. This knowledge is essential for intervening to prevent abuse and dependence outcomes. MethodsYoung adult cannabis users (Mage = 19.2[SD = 0.8]) in Southern California (N = 1007) were classified by patterns of problematic cannabis use from the Cannabis Abuse Screening Test, using Latent Class Analysis. Multinomial regression evaluated the association of frequency of use (no past 30 day use, infrequent [use on 1–2 of past 30 days], semi-frequent [use on 3–9 of the past 30 days], and frequent [use on 10 or more of the past 30 days]) for each cannabis product type (combustible, edible, vaporized, concentrate, blunt) with class membership. ResultsFour distinct classes of cannabis-related problems were identified: “non-symptomatic” (no problems; 33.8 %), “non-recreational use” (before noon and when alone; 34.5 %), “moderate use problems” (before noon, alone, and memory problems; 8.0 %), and “severe cannabis problems” (all 6 problems; 23.7 %). Semi-frequent (AOR range: 1.85–4.63;ps<0.05) and frequent (AOR range: 9.18–24.2;ps<0.05) use of combustible and vaporized cannabis, frequent blunt use (AORs range: 4.03–10.3;ps<0.05), and semi-frequent, but not frequent edible use (AOR range: 2.57–2.73;ps<0.05) was associated with higher odds of classification in any problematic use class (vs. non-symptomatic). ConclusionsDifferences in cannabis use problems across these classes and their predictors reveal the heterogeneity in cannabis-related problems experienced by young people. Combustible cannabis, vaporized cannabis, and blunt cannabis use may confer the most risk for cannabis abuse and dependency outcomes, with more frequent days of use contributing to increased patterns of risk.

A cross-national examination of cannabis protective behavioral strategies’ role in the relationship between Big Five personality traits and cannabis outcomes

ABSTRACT Background: Problematic cannabis use is common among young adults across the world. However, limited research has examined whether etiological models predicting negative consequences are universal. Objective: The present study examined whether the Five-Factor Model of personality (openness, conscientiousness, extraversion, agreeableness, and neuroticism) relates to cannabis outcomes via use of cannabis protective behavioral strategies (PBS) in a cross-national sample of college student cannabis users (i.e., used cannabis in the last 30 days). Method: Participants were 1175 university students (63.27% female) across five countries (United States, Argentina, Spain, Uruguay, and the Netherlands) recruited to complete an online survey. Results: PBS use mediated the associations between personality traits and cannabis consequences, such that higher conscientiousness (β = .20), agreeableness (β = .11), and lower emotional stability [i.e., higher neuroticism] (β = −.14) were associated with more PBS use. Higher PBS use was, in turn, associated with lower frequency of cannabis use (β = −.32); lower frequency of use was then associated with fewer cannabis consequences (β = .34). This sequential pathway was invariant across sex, but not countries. Notably, there were a number of differences in links between PBS and cannabis outcomes when comparing countries (e.g., negative associations in the US sample, but positive associations in the Argentina sample). Conclusions: Cannabis PBS mediates the relationship between personality traits and cannabis outcomes, but there are nuanced differences across countries (i.e., relationship between PBS and cannabis outcomes). Overall, students that are low in conscientiousness, agreeableness, and neuroticism and/or report low rates of PBS use may benefit from cannabis PBS-focused interventions that promote utilization of PBS.

A pilot randomized clinical trial of Brief Behavioral Treatment for Insomnia to reduce problematic cannabis use among trauma-exposed young adults

BackgroundInsomnia symptoms may be an important etiological factor for substance use disorders; however, whether improving sleep leads to reductions in problematic substance use among at-risk populations remains unclear. MethodAs such, the current pilot study used a randomized controlled design to test the effects of Brief Behavioral Treatment for Insomnia (BBTI) against a waitlist control among a sample of trauma-exposed young adults with elevated insomnia symptoms who regularly use cannabis (N = 56). Results: Intent-to-treat multilevel modeling analyses indicated that BBTI may be more efficacious than waitlist control in reducing self-reported insomnia symptoms, with large effects three months post-treatment (d = 1.34). Further, our initial evidence suggested that BBTI resulted in reductions in cannabis-related problems with medium to large effects at three months post-treatment (d = 0.75). The current pilot analyses indicated BBTI also reduced cravings to use cannabis to reduce negative emotions in response to trauma cues with a large effect size. ConclusionThis pilot study suggests BBTI may be efficacious not only in improving insomnia symptoms among cannabis users but also in reducing cannabis-related problems and cravings over three months. Future research should replicate these results in a larger, fully powered sample with improved follow-up rates designed to test temporal mediation using multimethod assessments of insomnia symptoms and problematic cannabis use. Overall, BBTI may be a promising intervention for trauma-exposed cannabis users to improve sleep and reduce cannabis-related problems.