Prospective associations of behavioral economic demand for cannabis and alcohol with simultaneous cannabis and alcohol use among young adults.

Behavioral economic demand for cannabis and alcohol is robustly associated with cannabis use and alcohol use, respectively. However, few studies have examined the contributions of cannabis and alcohol demand to simultaneous cannabis and alcohol use, which is common among young adults. We examined prospective associations of cannabis demand and alcohol demand with propensity for simultaneous use (broadly defined as using both cannabis and alcohol in the same day) and with cannabis and alcohol consumption during simultaneous use days among young adults. Young adults reporting simultaneous use (N = 107) completed a Marijuana Purchase Task assessing cannabis demand and an Alcohol Purchase Task assessing alcohol demand. They then completed daily smartphone surveys over 21 days assessing cannabis and alcohol use. Multilevel models revealed that higher cannabis demand (i.e., higher Omax, Pmax, and intensity; lower elasticity) was uniquely associated with greater propensity for simultaneous use relative to nonuse. In addition, higher alcohol demand (lower elasticity) was uniquely associated with greater propensity for simultaneous use relative to cannabis-only use, and higher cannabis demand (higher break point and intensity, lower elasticity) was uniquely associated with greater propensity for simultaneous use relative to alcohol-only use. Furthermore, in models limited to simultaneous use days, greater cannabis demand (higher Omax, lower elasticity) and lower alcohol demand (higher elasticity) were uniquely associated with greater overall cannabis flower consumption, and higher alcohol demand (higher Omax, lower elasticity) was uniquely associated with greater overall alcohol consumption. Results suggest that individual differences in cannabis and alcohol demand may contribute to simultaneous cannabis and alcohol use behaviors in a substance-specific pattern. Furthermore, cannabis demand may more strongly drive the tendency to engage in simultaneous use (vs. nonuse) relative to alcohol demand. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Randomized controlled trial of a smartphone app designed to reduce unhealthy alcohol consumption.

Background and aims: Unhealthy alcohol use is common and causes tremendous harm. Most people with unhealthy alcohol use will never seek formal alcohol treatment. As an alternative, smartphone apps have been developed as one means to provide help to people concerned about their alcohol use. The aim of this study was to test the efficacy of a smartphone app targeting unhealthy alcohol consumption in a general population sample. Methods: Participants were recruited from across Canada using online advertisements. Eligible participants who consented to the trial were asked to download a research-specific version of the app and were provided with a code that unlocked it (a different code for each participant to prevent sharing). Those who entered the code were randomized to one of two different versions of the app: 1) the Full app containing all intervention modules; or 2) the Educational only app, containing only the educational content of the app. Participants were followed-up at 6 months. The primary outcome variable was number of standard drinks in a typical week. Secondary outcome variables were frequency of heavy drinking days and experience of alcohol-related problems. Results: A total of 761 participants were randomized to a condition. The follow-up rate was 81 %. A generalized linear mixed model revealed that participants receiving the full app reduced their typical weekly alcohol consumption to a greater extent than participants receiving the educational only app (incidence rate ratio 0.89; 95 % confidence interval 0.80 to 0.98). No significant differences were observed in the secondary outcome variables (p > .05). Discussion and conclusion: The results of this trial provide some supportive evidence that smartphone apps can reduce unhealthy alcohol consumption. As this is the second randomized controlled trial demonstrating an impact of this same app (the first one targeted unhealthy alcohol use in university students), increased confidence is placed on the potential effectiveness of the smartphone app employed in the current trial.ClinicalTrials.org number: NCT04745325.

Psychometric Validation of the Gambling Craving Scale in a Treatment-Seeking Sample.

The Gambling Craving Scale (GACS) is a multifaceted measure of gambling craving. Initial validation work by Young and Wohl (2009) in university student samples showed that the GACS had a three-factor structure capturing dimensions of Desire, Anticipation, and Relief. Despite its potential clinical utility as a measure of craving, the GACS has yet to be validated in people seeking treatment for gambling problems. Accordingly, we examined the psychometric properties in a sample of people (N = 209; Mage = 37.66; 62.2% female) participating in a randomized controlled trial testing a novel online treatment for problem gambling. We predicted the GACS would have a three-factor structure. In addition, we also examined measurement invariance across sex and problem gambling risk status. Finally, we assessed concurrent validity of the factors with other measures of problem gambling severity and involvement. Exploratory structural equation modeling findings supported a three-factor structure that was invariant across the groups tested. Each of the Desire, Anticipation, and Relief subscales were significant positive predictors of problem gambling severity and symptoms, and some form of gambling behaviour. Findings show the GACS is a promising scale to assess multidimensional craving experiences among people in treatment for gambling problems.

Indirect Associations Between PTSD Symptoms and Cannabis Problems in Young Adults: The Unique Roles of Cannabis Coping Motives and Medicinal Use Orientation.

Background: Cannabis use in young adulthood has been associated with exposure to traumatic events and posttraumatic stress disorder (PTSD). Coping motives for cannabis use represent one mechanism linking PTSD with cannabis problems, yet some individuals with PTSD consider their cannabis use to be medicinal in nature. While a medicinal orientation to cannabis overlaps conceptually with coping motives, it could be associated with unique cannabis outcomes. Objectives: This study examined trauma-related coping motives and medicinal cannabis orientation as mediators of the association between PTSD symptoms and cannabis outcomes in young adults. Method: Data came from an online survey of 212 university students (M age = 19.41; 70.3% Women; 43.4% White) who used cannabis in the past month and endorsed a traumatic life event. Path analyses examined associations of PTSD symptoms with past month cannabis frequency and problems through medicinal cannabis orientation (i.e., number of mental health symptoms that cannabis is used to manage) and trauma-related coping motives. Results: PTSD symptoms were associated with trauma-related coping motives but not with medicinal cannabis orientation. Both trauma-related coping motives and medicinal cannabis orientation were uniquely associated with greater cannabis use frequency, but only trauma-related coping motives were associated with greater cannabis problems. There were significant indirect relationships from PTSD symptoms to cannabis use frequency and problems through trauma-related coping motives but not through medicinal cannabis orientation. Conclusions: Results support unique contributions of trauma-related coping motives and medicinal cannabis orientation to cannabis outcomes and suggest that trauma-related coping motives are specifically implicated in the link between PTSD and cannabis problems.

Daily and Momentary Associations Between Gender Minority Stress and Resilience With Alcohol Outcomes.

BACKGROUND AND PURPOSE: Minority stressors have been linked with alcohol use among transgender and gender diverse (TGD); however, no ecological momentary assessment studies have examined daily links between minority stress and alcohol use specifically among TGD. This study examined gender minority stressors and resilience as predictors of same-day or momentary alcohol-related outcomes. Feasibility and acceptability of procedures were evaluated. METHODS: Twenty-five TGD adults (mean age = 32.60, SD = 10.82; 88% White) were recruited Canada-wide and participated remotely. They completed 21 days of ecological momentary assessment with daily morning and random surveys (assessing alcohol outcomes, risk processes, gender minority stressors, resilience), and an exit interview eliciting feedback. RESULTS: Gender minority stress had significant and positive within-person relationships with same-day alcohol use (incidence risk ratio (IRR) = 1.12, 95% confidence interval [CI] [1.02, 1.23]), alcohol-related harms (IRR = 1.14, 95% CI [1.02, 1.28]), and coping motives (IRR = 1.06, 95% CI [1.03, 1.08]), as well as momentary (past 30-min) alcohol craving (IRR = 1.32, 95% CI [1.18, 1.47]), coping motives (IRR = 1.35, 95% CI [1.21, 1.51]), and negative affect (IRR = 1.28, 95% CI [1.20, 1.36]). Gender minority stress indirectly predicted same-day drinking via coping motives (ab = 0.04, 95% CI [0.02, 0.08]). Resilience was positively associated with same-day alcohol use (IRR = 1.25, 95% CI [1.03, 1.51]) but not harms. CONCLUSIONS: TGD adults may use alcohol to cope with gender minority stress, which can increase the risk for alcohol-related harms. Interventions are needed to eliminate gender minority stressors and support adaptive coping strategies.

Many transgender and gender diverse (TGD) adults experience discrimination and victimization related to their minoritized gender, referred to as minority stress. Minority stress may put TGD adults at risk of drinking more alcohol and experiencing related harms in order to cope. To examine this possibility, we recruited 25 TGD adults and asked them to complete surveys multiple times per day (i.e., once daily in the morning, and two additional surveys at random times) on their personal cell phones. Using multilevel models, we examined the relations between experiencing minority stressors as well as resilience factors on alcohol-related outcomes. In doing so, we identified that gender minority stress was related to increased alcohol use, alcohol-related harms, negative mood, and drinking to cope motives. Furthermore, it appeared that the increased alcohol use following minority stress could be partly explained by desiring to drink to cope. Resilience did not protect TGD adults from increased alcohol use or harms, and in some cases was related to increased alcohol use. The results support that TGD adults may use alcohol to cope with gender minority stress, which can increase the risk for alcohol-related harms. Interventions are needed to eliminate gender minority stressors and support healthier coping strategies.

Interactive effects of alcohol and cannabis quantities in the prediction of same-day negative consequences among young adults.

BACKGROUND: Simultaneous alcohol and cannabis use is common, but observational studies examining negative consequences of simultaneous use have rarely considered dose-related interactions between alcohol and cannabis. This study examined interactions between quantities of cannabis and alcohol consumed in predicting negative consequences on simultaneous use days. METHODS: Young adults (N = 151; 64% female; 62% White) reporting recent simultaneous use and at least weekly alcohol and cannabis use completed 21 daily, smartphone-based surveys assessing previous day quantities of cannabis and alcohol used, types of cannabis used (flower, concentrates, edibles), and negative substance-related consequences. Multilevel models examined: (1) whether negative consequences differed within-person across simultaneous use days and single-substance use days; and (2) whether quantities of alcohol and cannabis consumed on simultaneous use days interacted, within-person, to predict negative consequences. We focused on quantities of cannabis flower (grams) in primary analyses and explored quantities of other forms of cannabis (concentrates, edibles) in supplementary analyses. RESULTS: Participants reported fewer negative consequences on alcohol-only (243 observations) and cannabis-only (713 observations) days than they did on simultaneous use days (429 observations). On simultaneous use days involving cannabis flower use (313 observations across 81 participants), the within-person association between number of standard drinks and negative consequences was weaker on days during which larger (vs. smaller) amounts of cannabis flower were consumed. Inspection of simple slopes revealed that decreased alcohol use was associated with less of a decline in negative consequences when combined with relatively greater amounts of cannabis flower. CONCLUSIONS: Although simultaneous use was associated with more negative consequences than alcohol-only and cannabis-only use, negative consequences on simultaneous use days varied as a function of the interaction between alcohol and cannabis quantities. As findings suggest that using larger amounts of cannabis may attenuate declines in negative consequences associated with lighter drinking, interventions for higher-risk simultaneous use patterns may benefit from a focus on quantities of both alcohol and cannabis.

How much THC is in that joint? A daily diary study of young adults' knowledge of the cannabinoid content of cannabis products.

OBJECTIVE: Many young adults report frequent cannabis use and are at risk for cannabis harms. Knowledge of the tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations of cannabis products may promote harm reduction, but few studies have characterized cannabinoid concentration knowledge in this population. This study used day-level data to examine predictors of cannabinoid concentration knowledge and associations of cannabinoid concentration knowledge with substance-related consequences among young adults. METHOD: Participants (N=131; mean age 22.11 years, 64.12% female) from a larger study of cannabis and alcohol co-use completed daily surveys over 21 days assessing knowledge of the cannabinoid concentrations of cannabis used, forms of cannabis used, motives for cannabis use (medicinal, nonmedicinal, both), and substance-related consequences. RESULTS: On average, participants reported at least some knowledge of the THC and CBD concentrations of their cannabis on a respective 48% and 32% of their cannabis days. Generalized linear mixed models revealed that participants with a greater propensity to use non-flower (relative to flower) cannabis products and to report medicinal (relative to exclusively non-medicinal) motives for cannabis use reported greater cannabinoid concentration knowledge overall across days, controlling for sociodemographic factors and level of cannabis involvement. Participants with greater overall cannabinoid concentration knowledge reported positive substance-related consequences more often. In addition, participants were more likely to report negative substance-related consequences on days during which cannabinoid concentrations were known versus unknown. CONCLUSIONS: Findings suggest that cannabinoid concentration knowledge may be higher among young adults who report primarily non-flower and medicinally-motivated cannabis use, although cannabinoid concentration knowledge, alone, may not protect against negative substance-related consequences at the day level.

Knowledge of Cannabinoid Content Among People Living with HIV Who Use Cannabis: a Daily Diary Study.

BACKGROUND: Many people living with HIV (PLWH) use cannabis for medicinal reasons. Patients' knowledge of the tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations of the cannabis products they use may be important in helping patients achieve symptom relief while guarding against potential risks of cannabis use. However, no studies have examined cannabinoid concentration knowledge among PLWH. METHOD: PLWH (N = 29; 76% men, mean age 47 years) reporting cannabis use for both medicinal and nonmedicinal reasons completed daily surveys over 14 days assessing cannabis products used, knowledge of cannabinoid concentrations of cannabis products used, cannabis use motives (medicinal, nonmedicinal, both), and positive and negative cannabis-related consequences. Across the 361 cannabis use days captured on the daily surveys, at least some knowledge of cannabinoid concentrations was reported on an average of 43.1% (for THC) and 26.6% (for CBD) of the days. RESULTS: Generalized linear mixed models revealed that participants were more likely to report knowing THC and CBD concentrations on days when they used non-flower forms of cannabis relative to days when they used cannabis flower only. Participants who used cannabis for medicinal reasons on a greater proportion of days had greater knowledge of cannabinoid concentration overall across days. Further, greater overall knowledge of cannabinoid concentrations was associated with fewer reported negative cannabis-related consequences. CONCLUSIONS: Findings suggest that among PLWH, knowledge of cannabinoid concentrations may be higher when using non-flower cannabis products and among those reporting primarily medicinal cannabis use. Moreover, knowledge of cannabinoid concentration may protect against negative cannabis-related consequences in this population.

Executive functions and behavioral economic demand for cannabis among young adults: Indirect associations with cannabis consumption and cannabis use disorder.

Behavioral economic demand for cannabis is robustly associated with cannabis consumption and cannabis use disorder (CUD). However, few studies have examined the processes underlying individual differences in the relative valuation of cannabis (i.e., demand). This study examined associations between executive functions and cannabis demand among young adults who use cannabis. We also examined indirect associations of executive functions with cannabis consumption and CUD symptoms through cannabis demand. Young adults (N = 113; 58.4% female; mean age 22 years) completed a Marijuana Purchase Task. Participants also completed cognitive tasks assessing executive functions (set shifting, inhibitory control, working memory) and semistructured interviews assessing past 90-day cannabis consumption (number of grams used) and number of CUD symptoms. Poorer inhibitory control was significantly associated with greater Omax (peak expenditure on cannabis) and greater intensity (cannabis consumption at zero cost). Poorer working memory was significantly associated with lower elasticity (sensitivity of consumption to escalating cost). Lower inhibitory control was indirectly associated with greater cannabis consumption and CUD symptoms through greater Omax and intensity, and poorer working memory was indirectly associated with greater cannabis consumption and CUD symptoms through reduced elasticity. This study provides novel evidence that executive functions are associated with individual differences in cannabis demand. Moreover, these results suggest that cannabis demand could be a mechanism linking poorer executive functioning with heavier cannabis use and CUD, which should be confirmed in future longitudinal studies. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Multilevel associations of emotion regulation strategy use during psychotherapy for depression: A longitudinal study.

BACKGROUND: People with depression select avoidant emotion regulation (ER) strategies more often than engagement strategies. While psychotherapy improves ER strategies, examining the week-to-week changes in ER and their relationship to clinical outcomes is warranted to understand how these interventions work. This study examined the changes in six ER strategies and depressive symptoms during virtual psychotherapy. METHODS: Treatment-seeking adults (N = 56) with moderate depression severity completed a baseline diagnostic interview and questionnaires and were followed for up to 3 months as they completed virtual psychotherapy in an unrestricted format (e.g., individual) and orientation (e.g., cognitive-behavioral therapy; CBT). Participants completed weekly assessments of depression and six ER strategies along with assessments of CBT skills and participant-rated CBT components for each psychotherapy session. Multilevel modeling was used to examine associations between within-person changes in ER strategy use and weekly depression scores, controlling for between-person effects and time. RESULTS: Depressive symptoms, rumination, and experiential avoidance decreased non-linearly over time while cognitive reappraisal and acceptance increased non-linearly. Controlling for CBT skills, within-person increases in acceptance and cognitive reappraisal, as well as within-person decreases in experiential avoidance, were associated with fewer depressive symptoms over time. People who reported greater CBT components in their sessions also reported fewer depressive symptoms over time. LIMITATIONS: The study was unable to make more causal inferences or standardize the type, baseline, or length of psychotherapy received. CONCLUSIONS: Improvements in ER strategies were associated with depression symptom reduction during psychotherapy. Future research to elucidate ER strategies as mediators of treatment response is warranted.

Characterizing heterogeneity among people who use cannabis for medicinal reasons: A latent class analysis of a nationally representative Canadian sample.

BACKGROUND: Many individuals who use cannabis report doing so for medicinal reasons. Few studies have explored heterogeneity within this population, which may be important to inform targeted interventions. This study used latent class analysis to identify subgroups of people who use cannabis for medicinal reasons and their sociodemographic and cannabis-risk-related correlates. METHOD: Data were drawn from the 2019 Canadian Alcohol and Drugs Survey, which is a representative survey of Canadians ages 15 years and older. Data from 814 individuals reporting past-year use of cannabis for medicinal or mixed medicinal and non-medicinal reasons were included. Latent class analysis was conducted with forms of cannabis used, cannabis use frequency, concurrent non-medicinal cannabis use, and the medical conditions and symptoms cannabis was used to manage as indicators. RESULTS: Four distinct latent classes of medicinal cannabis use were identified: a non-daily cannabis flower for mental health and sleep class (39.56% of the sample), a non-daily cannabis flower for pain class (26.41% of the sample), a non-daily cannabis oil for physical health class (20.15% of the sample), and a daily multi-form cannabis for mental health and non-medical reasons class (13.88% of the sample). Sociodemographic factors and risk level for cannabis-related harms were associated with latent class membership. CONCLUSIONS: Results of this study reveal considerable heterogeneity among people reporting medicinal cannabis use and suggest that the distinct patterns of cannabis use behaviors and motives observed may be important for understanding risk for cannabis-related harms in this population. Findings underscore a need for harm reduction interventions tailored toward specific patterns of medicinal cannabis use.

The Impact of Recreational Cannabis Legalization on Cannabis Use and Associated Outcomes: A Systematic Review.

Background: Recreational cannabis legalization has become more prevalent over the past decade, increasing the need to understand its impact on downstream health-related outcomes. Although prior reviews have broadly summarized research on cannabis liberalization policies (including decriminalization and medical legalization), directed efforts are needed to synthesize the more recent research that focuses on recreational cannabis legalization specifically. Thus, the current review summarizes existing studies using longitudinal designs to evaluate impacts of recreational cannabis legalization on cannabis use and related outcomes. Method: A comprehensive bibliographic search strategy revealed 61 studies published from 2016 to 2022 that met criteria for inclusion. The studies were predominantly from the United States (66.2%) and primarily utilized self-report data (for cannabis use and attitudes) or administrative data (for health-related, driving, and crime outcomes). Results: Five main categories of outcomes were identified through the review: cannabis and other substance use, attitudes toward cannabis, health-care utilization, driving-related outcomes, and crime-related outcomes. The extant literature revealed mixed findings, including some evidence of negative consequences of legalization (such as increased young adult use, cannabis-related healthcare visits, and impaired driving) and some evidence for minimal impacts (such as little change in adolescent cannabis use rates, substance use rates, and mixed evidence for changes in cannabis-related attitudes). Conclusions: Overall, the existing literature reveals a number of negative consequences of legalization, although the findings are mixed and generally do not suggest large magnitude short-term impacts. The review highlights the need for more systematic investigation, particularly across a greater diversity of geographic regions.

Normative Misperceptions About Cannabis Use in a Sample of Risky Cannabis Users.

Introduction: This study examines normative misperceptions in a sample of participants recruited for a brief intervention trial targeting risky cannabis use. Methods: Participants who were concerned about their own risky cannabis use were recruited to help develop and evaluate intervention materials. At baseline, participants reported on their own cannabis use and provided estimates of how often others their gender and age used cannabis in the past 3 months. Comparisons were made between participants estimates of others cannabis use with reports of cannabis use obtained from a general population survey conducted during a similar time period. Results: Participants (N = 744, mean age = 35.8, 56.2% identified as female) largely reported daily or almost daily cannabis use (82.4%). Roughly half (55.3%) of participants estimated that others their age and gender used cannabis weekly or more often in the past 3 months, whereas the majority of people in the general population reported not using cannabis at all. Conclusions: Normative misperceptions about cannabis use were common in this sample of people with risky cannabis use. Limitations and possible future directions of this research are discussed, as well as the potential for targeting these misperceptions in interventions designed to motivate reductions in cannabis use. ClinicalTrialsorg number: NCT04060602.

Daily associations between cannabis use and alcohol use among people who use cannabis for both medicinal and nonmedicinal reasons: Substitution or complementarity?

OBJECTIVE: People who use cannabis for medicinal (vs. nonmedicinal) reasons report greater cannabis use and lower alcohol use, which may reflect a cannabis-alcohol substitution effect in this population. However, it is unclear whether cannabis is used as a substitute or complement to alcohol at the day level among people who use cannabis for both medicinal and nonmedicinal reasons. This study used ecological momentary assessment to examine this question. METHOD: Participants (N = 66; 53.1% men; mean age 33 years) completed daily surveys assessing previous-day reasons for cannabis use (medicinal vs. nonmedicinal), cannabis consumption (both number of different types of cannabis used and grams of cannabis flower used), and number of standard drinks consumed. RESULTS: Multilevel models revealed that, in general, greater cannabis consumption on a given day was associated with greater same-day alcohol use. Further, days during which cannabis was used for medicinal (vs. exclusively nonmedicinal) reasons were associated with reduced consumption of both cannabis and alcohol. The day-level association between medicinal reasons for cannabis use and lower alcohol consumption was mediated by using fewer grams of cannabis on medicinal cannabis use days. CONCLUSIONS: Day-level cannabis-alcohol associations may be complementary rather than substitutive among people who use cannabis for both medicinal and nonmedicinal reasons, and lower (rather than greater) cannabis consumption on medicinal use days may explain the link between medicinal reasons for cannabis use and reduced alcohol use. Still, these individuals may use greater amounts of both cannabis and alcohol when using cannabis for exclusively nonmedicinal reasons. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Efficacy of a novel online integrated treatment for problem gambling and tobacco smoking: Results of a randomized controlled trial.

Background and aims: Problem gambling and tobacco use are highly comorbid among adults. However, there are few treatment frameworks that target both gambling and tobacco use simultaneously (i.e., an integrated approach), while also being accessible and evidence-based. The aim of this two-arm open label RCT was to examine the efficacy of an integrated online treatment for problem gambling and tobacco use. Methods: A sample of 209 participants (Mage = 37.66, SD = 13.81; 62.2% female) from North America were randomized into one of two treatment conditions (integrated [n = 91] or gambling only [n = 118]) that lasted for eight weeks and consisted of seven online modules. Participants completed assessments at baseline, after treatment completion, and at 24-week follow-up. Results: While a priori planned generalized linear mixed models showed no condition differences on primary (gambling days, money spent, time spent) and secondary outcomes, both conditions did appear to significantly reduce problem gambling and smoking behaviours over time. Post hoc analyses showed that reductions in smoking and gambling craving were correlated with reductions in days spent gambling, as well as with gambling disorder symptoms. Relatively high (versus low) nicotine replacement therapy use was associated with greater reductions in gambling behaviours in the integrated treatment condition. Discussion and conclusions: While our open label RCT does not support a clear benefit of integrated treatment, findings suggest that changes in smoking and gambling were correlated over time, regardless of treatment condition, suggesting that more research on mechanisms of smoking outcomes in the context of gambling treatment may be relevant.

Disentangling Medicinal and Recreational cannabis Use Among People Living with HIV: An Ecological Momentary Assessment Study.

This study examined the feasibility of using ecological momentary assessment (EMA) to disentangle medicinal cannabis use (MCU) from recreational cannabis use (RCU) among people living HIV (PLWH). Over a 14-day period, PLWH (N = 29) who engaged in both MCU and RCU completed a smartphone-based survey before and after every cannabis use event assessing general motivation for cannabis use (MCU-only, RCU-only, or mixed MCU/RCU), cannabis use behavior, and several antecedents and outcomes of cannabis use. A total of 739 pre-cannabis surveys were completed; 590 (80%) of the prompted post-cannabis surveys were completed. Motives for cannabis use were reported as MCU-only on 24%, RCU-only on 30%, and mixed MCU/RCU on 46% of pre-cannabis surveys. Mixed effects models examined within-person differences across MCU-only, RCU-only, and mixed MCU/RCU events. Results showed that relative to RCU-only events, MCU-only events were more likely to involve symptom management and drug substitution motives, physical and sleep-related symptoms, solitary cannabis use, and use of cannabis oils and sprays; MCU-only events were less likely to involve relaxation, happiness, and wellness motives, cannabis flower use, and positive cannabis consequences. Differences between mixed MCU/RCU and RCU-only events were similar, except that mixed MCU/RCU events were additionally associated with stress reduction motives and symptoms of anxiety and depression. Findings support the feasibility of partially disentangling MCU and RCU behavior among PLWH who engage in concurrent MCU and RCU. This study highlights the need for more EMA studies isolating MCU from RCU to inform ongoing changes to cannabis policies.

Peer support and online cognitive behavioural therapy for substance use concerns: protocol for a randomised controlled trial.

INTRODUCTION: Hazardous alcohol and drug use is associated with substantial morbidity, mortality and societal cost worldwide. Yet, only a minority of those struggling with substance use concerns receive specialised services. Numerous barriers to care exist, highlighting the need for scalable and engaging treatment alternatives. Online interventions have exhibited promise in the reduction of substance use, although studies to date highlight the key importance of patient engagement to optimise clinical outcomes. Peer support may provide a way to engage patients using online interventions. The goal of this study is to evaluate the efficacy and cost-effectiveness of Breaking Free Online (BFO), an online cognitive-behavioural intervention for substance use, delivered with and without peer support. METHODS AND ANALYSIS: A total of 225 outpatients receiving standard care will be randomised to receive clinical monitoring with group peer support, with BFO alone, or with BFO with individual peer support, in an 8-week trial with a 6-month follow-up. The primary outcome is substance use frequency; secondary outcomes include substance use problems, depression, anxiety, quality of life, treatment engagement and cost-effectiveness. Mixed effects models will be used to test hypotheses, and thematic analysis of qualitative data will be undertaken. ETHICS AND DISSEMINATION: The protocol has received approval by the Centre for Addiction and Mental Health Research Ethics Board. Results will help to optimise the effectiveness of structured online substance use interventions provided as an adjunct to standard care in hospital-based treatment programmes. Findings will be disseminated through presentations and publications to scholarly and knowledge user audiences. TRIAL REGISTRATION NUMBER: NCT05127733.

Longitudinal co-trajectories of depression and alcohol problems in adults during the COVID-19 pandemic.

We examined person-centered heterogeneity in the longitudinal co-development of depression and alcohol problems during the COVID-19 outbreak. We also investigated the risk factors (personality and coping) for being in "higher" relative to "lower" risk subgroups of combined depressive symptoms and alcohol problems. Canadian participants (N = 364, M age = 32.16, 54.67% male) completed questionnaires four times every three months, starting approximately 2 months after Canada announced its COVID-19 State-of-Emergency. Parallel-process latent class growth analysis found evidence for three latent subgroups: a "moderate increasing depression and alcohol problems" subgroup (Class 1); a "moderate stable depression, moderate decreasing alcohol problems" subgroup (Class 2); and a "low-risk normative" subgroup (with mild depression that was stable and mild alcohol problems that decreased; Class 3). Multinomial logistic regressions found that higher levels of hopelessness, impulsivity, and boredom proneness distinguished Class 1 from Class 3. Further, lower levels of general self-efficacy distinguished Class 1 from Classes 2 and 3. Linear mixed models found that Class 1 increasingly used maladaptive avoidant coping strategies (denial, drugs/alcohol, behavioural disengagement) as the pandemic progressed, whereas Class 2 increasingly used adaptive approach-oriented strategies (planning, seeking emotional support from others). We analyzed longitudinal data to detect classes of individuals with depressive and alcohol-related difficulties during COVID-19 and to characterize the vulnerability factors for increased difficulties. Highlighting the heterogeneity in the co-trajectory of depression and alcohol problems during COVID-19 and the personality and coping factors associated with combined increases in these mental health difficulties can inform treatment practices and bolster peoples' preparedness and resilience for future pandemics. Supplementary Information: The online version contains supplementary material available at 10.1007/s12144-022-04109-4.

Correlates of Self-Reported Medicinal Cannabis Use for Physical Health, Mental Health, and Sleep-Related Conditions in a Population-Based Survey of Canadian Youth.

OBJECTIVE: Medicinal cannabis use (MCU) among youth is correlated with frequent cannabis use and multiple substance use and health-related indicators. This study examined whether correlates of self-reported MCU among youth varied as a function of the primary health condition for which cannabis is used. METHOD: Data were drawn from the 2017 Canadian Tobacco, Alcohol, and Drugs Survey. Youth (ages 15-24) who reported past-year cannabis use were included in these analyses. Regression analyses (controlling for age and sex) compared youth reporting only nonmedicinal cannabis use (NMCU only, n = 2,082) to youth reporting MCU for physical health conditions (n = 227), mental health conditions (n = 271), or insomnia (n = 98). RESULTS: Relative to youth reporting NMCU only, youth reporting MCU for physical or mental health conditions had greater odds of reporting daily cannabis use, cannabis problems, vaporization and oral ingestion of cannabis, and tobacco use. Youth reporting MCU for physical health reasons also had greater odds of both illicit drug use and prescription pain medication use, whereas youth reporting MCU for mental health reasons had greater odds of prescription sedative use. Youth in both the physical health and mental health MCU groups reported poorer health and mental health compared with the NMCU-only group. Youth reporting MCU for insomnia had greater odds of cannabis problems relative to youth in the NMCU-only group, but there were no other differences between these groups. CONCLUSIONS: Findings provide new insight into the correlates of MCU among youth in the Canadian population, suggesting that these correlates vary as a function of the primary reason for MCU.

Examining differential responses to the Take Care of Me trial: A latent class and moderation analysis.

Given prevalent alcohol misuse-emotional comorbidities among young adults, we developed an internet-based integrated treatment called Take Care of Me. Although the treatment had an impact on several secondary outcomes, effects were not observed for the primary outcome. Therefore, the goal of the current study was to examine heterogeneity in treatment responses. The initial RCT randomized participants to either a treatment or psychoeducational control condition. We conducted an exploratory latent class analysis to distinguish individuals based on pre-treatment risk and then used moderated regressions to examine differential treatment responses based on class membership. We found evidence for three distinct groups. Most participants fell in the "low severity" group (n = 123), followed by the "moderate severity" group (n = 57) who had a higher likelihood of endorsing a previous mental health diagnosis and treatment and higher symptom severity than the low group. The "high severity" group (n = 42) endorsed a family history of alcoholism, and the highest symptom severity and executive dysfunction. Moderated regressions revealed significant class differences in treatment responses. In the treatment condition, high severity (relative to low) participants reported higher alcohol consumption and hazardous drinking and lower quality of life at follow-up, whereas moderate severity (relative to low) individuals had lower alcohol consumption at follow-up, and lower hazardous drinking at end-of-treatment. No class differences were found for participants in the control group. Higher risk individuals in the treatment condition had poorer responses to the program. Tailoring interventions to severity may be important to examine in future research.