Dual trajectories of cannabis and alcohol use among young adults in a state with legal nonmedical cannabis

The Effects of Recreational Cannabis Laws on Alcohol and Tobacco Use Among U.S. Adults, 2012-2022

INTRODUCTION

Many states have legalized the use of cannabis for medicinal and recreational purposes in the past decade. However, it remains unclear how recreational cannabis laws affect alcohol and tobacco use among adults.

METHODS

This was a cross-sectional study of 4.8 million adults from the 2012-2022 Behavioral Risk Factor Surveillance System. A difference-in-differences approach was used to examine the impact of recreational cannabis laws on alcohol and tobacco use, adjusting for individual-level characteristics and time-varying state-level factors. The analyses were performed in 2024.

RESULTS

Three alcohol-use outcomes (current, binge, and heavy drinking) and 2 tobacco-use outcomes (current and smokeless tobacco use) were examined. Considering the passage of laws as cannabis law implementation, recreational cannabis laws were not associated with any alcohol or tobacco use outcomes in the fully adjusted model. However, considering operational dispensary as cannabis law implementation, recreational cannabis laws were associated with a decrease of 0.95 percentage point (95% CI=1.80, 0.09) in current drinking and a decrease of 0.48 percentage point (95% CI=0.85, 0.10) in current cigarette use. Subgroup analysis showed that recreational cannabis laws were associated with reductions in current drinking, binge drinking, and current cigarette use in multiple groups. However, recreational cannabis laws were associated with increases in current smokeless tobacco use for some groups.

CONCLUSIONS

The findings suggest that although the overall effects of recreational cannabis laws on the use of alcohol and tobacco may be limited, there are heterogeneous associations between recreational cannabis laws and drinking and smoking by age, sex, race and ethnicity, education, and income.

Alcohol Use Motives and Cannabis Use among Young Adults: Between- and Within-Person Associations Based on Monthly Data from a Community Sample

Objective: Alcohol use motives may characterize types of drinking that have unique associations with cannabis use and illuminate psychological processes underlying cannabis use. This study examined how alcohol use motives, both on average across two years and in a particular month, were associated with any and frequent cannabis use. Method: A young adult community sample (n = 486; 54% female, age 18-23 at enrollment) who used alcohol and cannabis in the year prior to study enrollment provided two years of monthly data. Multilevel logistic regression models predicting any and frequent (10+ occasions) past-month cannabis use estimated both between- and within-person effects of alcohol use motives, controlling for frequency of alcohol use and demographic covariates. Results: Alcohol use frequency was positively associated with any cannabis use at the between- and within-person levels and frequent cannabis use at the within-person level. Across two years, individuals who had higher average coping drinking motives and lower average social and conformity drinking motives were more likely to use cannabis frequently. Further, between-person variation in social motives was negatively associated with any cannabis use. Within-person, months with greater enhancement and social motives were associated with higher probability of any cannabis use. Conclusions: Using alcohol for coping reasons, rather than other-focused social reasons, indicated greater risk for frequent cannabis use, although drinking for social and enhancement reasons in a particular month signaled slightly increased short-term probability of any cannabis use. Assessment of alcohol motives may help guide targeting and timing of prevention related to cannabis use.

Virtual recruitment and participant engagement for substance use research during a pandemic

PURPOSE OF REVIEW

The coronavirus disease 2019 pandemic resulted in cataclysmic changes to the research enterprise, causing a forced shutdown or rapid pivot to virtual methods. Adapting studies to the virtual environment also impacted recruitment and retention strategies. This review elucidated challenges and offered pragmatic recommendations, drawing on published literature and our prior work, to assist researchers in re-evaluating and amending best-practice techniques to bolster inclusive recruitment and study engagement of people using substances, particularly for virtual interviews or focus groups.

RECENT FINDINGS

Ameliorating recruitment strategies and research protocols to better fit virtual methods of recruitment and study administration required careful consideration of ethical and logistical implications. Many procedures to increase enrollment of underrepresented populations, such as building mutually beneficial and respectful community partnerships, recruiting via social media, or providing ambulatory research centers, existed prior to this specific pandemic. However, unprecedented disruptions in resources needed to participate in virtual interviews or focus groups, privacy concerns, and possible deteriorating trust in research necessitated continued adaptation and expansion of these strategies.

SUMMARY

Building upon prepandemic, community-engaged strategies may continue to facilitate diverse recruitment efforts and advance science productivity in the substance use and addiction field during the pandemic and thereafter.

Trends in Alcohol, Cigarette, E-Cigarette, and Nonprescribed Pain Reliever Use Among Young Adults in Washington State After Legalization of Nonmedical Cannabis

PURPOSE

Liberalization of cannabis laws may be accompanied by changes in the use of substances other than cannabis and changes in associations of cannabis use with other types of substance use. This study assessed (1) trends in alcohol, nicotine, and nonprescribed pain reliever use and (2) changes in associations of cannabis use with these other substances among young adults in Washington State after nonmedical cannabis legalization.

METHODS

Regression models stratified by age (18-20 vs. 21-25) were used to analyze six annual waves of cross-sectional survey data from a statewide sample from 2014 through 2019 (N = 12,694).

RESULTS

Prevalence of past-month alcohol use, heavy episodic drinking (HED), and cigarette use and prevalence of past-year pain reliever misuse decreased, while the prevalence of past-month e-cigarette use increased since 2016 (the first year assessed). Across years and age groups, the prevalence of substance use other than cannabis was higher among occasional and frequent cannabis users compared to cannabis nonusers. However, associations between both occasional (1-19 days in the prior month) and frequent (20+ days) cannabis use and pain reliever misuse and between frequent cannabis use and HED weakened over time among individuals ages 21-25.

DISCUSSION

Contrary to concerns about spillover effects, implementation of legalized nonmedical cannabis coincided with decreases in alcohol and cigarette use and pain reliever misuse. The weakening association of cannabis use with the use of other substances among individuals ages 21-25 requires further research but may suggest increased importance of cannabis-specific prevention and treatment efforts.