Simultaneous alcohol and marijuana use among college students in the United States, 2006-2019

Associations of cannabis use, use frequency, and cannabis use disorder with violent behavior among young adults in the United States

BACKGROUND

Most violent crimes (52 %) are committed by adults aged 18-34, who account for 23 % of the US population and have the highest prevalence of cannabis use and cannabis use disorder (CUD). We examined whether and how associations of cannabis use, use frequency, and CUD with violent behavior (i.e., attacking someone with the intent to harm seriously) vary by sex in U.S. young adults.

METHODS

Data were from 113,454 participants aged 18-34 in the 2015-2019 US National Surveys on Drug Use and Health, providing nationally representative data on cannabis use, CUD (using DSM-IV criteria), and violent behavior. Descriptive analyses and bivariate and multivariable logistic regression analyses were conducted.

RESULTS

Among U.S. adults aged 18-34, 28.9 % (95 % CI = 28.5-29.2 %) reported past-year cannabis use (with/without CUD), including 20.5 % (95 % CI = 20.2-20.8 %) with non-daily cannabis without CUD, 4.7 % (95 % CI = 4.5-4.8 %) with daily cannabis use without CUD, 2.1 % (95 % CI = 1.9-2.2 %) with non-daily cannabis use and CUD, and 1.7 % (95 % CI = 1.5-1.8 %) with daily cannabis use and CUD. Past-year adjusted prevalence of violent behavior was higher among males with daily cannabis use but without CUD (2.9 %, 95 % CI = 2.4-2.7 %; adjusted prevalence ratio (PR) = 1.7, 95 % CI = 1.3-2.2) and males with daily cannabis use and CUD (3.1 %, 95 % CI = 2.3-4.0 %; adjusted PR = 1.8, 95 % CI = 1.3-2.4) than males without past-year cannabis use (1.7 %, 95 % CI = 1.6-1.9 %). Adjusted prevalence of violent behavior was higher among females with cannabis use regardless of daily cannabis use/CUD status (adjusted prevalence = 1.6-2.4 %, 95 % CIs = 0.9-3.2 %; adjusted PRs = 1.6-2.4, 95 % CI = 1.3-3.2) than females without past-year cannabis use (1.0 %, 95 % CI = 0.9-1.1 %).

CONCLUSIONS

Research is needed to ascertain the directionality of the associations between cannabis use and violent behavior and underlying sex-specific mechanism(s). Our results point to complex sex-specific relationships between cannabis use frequency, CUD, and violent behavior and highlight the importance of early screening for and treatment of CUD and of preventive interventions addressing cannabis misuse.

Assessment of simultaneous alcohol and cannabis use and its related consequences and cognitions in college students: A narrative review

As rates of students using cannabis continue to rise, simultaneous use of alcohol and cannabis (such that their effects overlap; commonly referred to as simultaneous alcohol and marijuana [SAM] use) is prevalent among college students who use both substances. Although research focusing on SAM use and related cognitions and consequences continues to grow, there are no common established measures, as approaches vary across studies. This narrative review identifies current methods for assessing SAM use and measures of SAM-related consequences and cognitions (motives and expectancies) among college students, evaluates how they were developed, identifies gaps in the literature, and provides recommendations for future directions of assessment. We conclude that the assessment of SAM use is limited by difficulties in the assessment of cannabis quantity and potency. However, and the lack of a psychometrically validated measure of SAM consequences. However, measures of SAM motives and expectancies have been published with support from psychometric examinations such as exploratory factor analysis, confirmatory factor analysis, and measurement invariance. Research is needed that incorporates qualitative approaches in the development of SAM use measures so that unique items specific to SAM use rather than single-substance use can be identified. Additionally, validation of these measures is needed across different samples that vary demographically, such as by race and gender or sex. Future research should consider the development of a measure of protective behavioral strategies  specific to SAM use to inform interventions that target the reduction of negative consequences of SAM use.

Alcohol and cannabis dual use among Black adults: Associations with alcohol use, use-related problems, and race-based discrimination

BACKGROUND AND OBJECTIVES

Black adults who drink alcohol appear at risk for poor alcohol-related outcomes, yet little research has examined whether cannabis use among those who consume alcohol (alcohol-cannabis dual use) is related to worse alcohol-related consequences, as observed in predominantly White samples. Further, it may be that experiencing more race-based discrimination may be related to using multiple substances to cope with such experiences; however, no known studies have examined the impact of race-based discrimination on alcohol-cannabis dual use.

METHODS

Participants were 270 Black undergraduates who endorsed past-month drinking, 112 of whom endorsed alcohol-cannabis dual use.

RESULTS

The dual use group reported heavier drinking, more drinking-related problems, and more race-based microaggressions (but not overt racism) than the alcohol-only group.

CONCLUSIONS

The use of cannabis among Black young adults who drink alcohol was related to heavier drinking and more alcohol-related problems. Further, experiencing more microaggressions may place these individuals at risk for using multiple substances, presumably to cope with these experiences.

SCIENTIFIC SIGNIFICANCE

Considering models suggesting that the dual use of cannabis may result in less alcohol use, the current study highlights that for Black adults who consume alcohol, cannabis dual use is related to heavier drinking and more alcohol-related problems, which can inform intervention and treatment efforts.

Opioid Misuse and Associated Health Risks among Adults on Probation and Parole: Prevalence and Correlates 2015-2020

BACKGROUND

As state legislatures work to reduce prison populations and increase the use of community-based alternatives, limited knowledge exists about the service needs of those under criminal justice supervision in the community. Preliminary research indicates unusually high rates of disease, disability, and death. Health risks for this population include opioid misuse, a form of substance misuse that has reached epidemic proportions in the U.S. Evidence indicates this may be one of multiple epidemics this population experiences, complicating intervention.

METHODS

Our study included 5154 individuals on probation or parole. Using 2015-2020 data from the National Survey of Drug Use and Health (NSDUH), we conducted a series of logistic regressions examining associations between opioid misuse and a range of health risks, controlling for sociodemographic variables and survey year.

RESULTS

Approximately 17% of those on probation or parole indicated past-year opioid misuse, a rate 4 times higher than in the general population. Compared to those on probation and parole who did not misuse opioids, it was associated with higher odds of other health risk behaviors and mental health problems. For example, the odds of marijuana and cocaine use were 4-6 times higher and the odds of substance use disorder were 10 times higher. Similarly, the odds of experiencing major depressive episodes and serious psychological distress were 2-3 times higher.

CONCLUSIONS

Our findings reveal a markedly high risk for opioid misuse within this population along with associated risks for behavioral and mental health problems. The complex treatment needs of this population require greater policy attention and further research.

Preliminary evidence of increased alcohol use associated with ethinyl estradiol levels in women using oral contraceptives

Alcohol use is highly prevalent in young adult women and rates of alcohol use disorder are rising rapidly in this population. Further, emerging evidence suggests that circulating levels of ovarian hormones influence alcohol consumption, with increased consumption associated with higher estradiol and lower progesterone levels. However, less is known about the influence of synthetic hormones (contained in oral contraceptive (OC) pills) on alcohol use. The current study examined the influence of OC pill phase, ethinyl estradiol (EE) levels, and progestin levels on self-reported alcohol consumption in healthy female drinkers. Young adult female drinkers using OCs (N = 21) reported alcohol use across one OC pill pack using the Timeline Followback and provided blood samples during both pill phases to measure synthetic hormone levels. We compared alcohol use between OC pill phases (active vs. inactive) using linear mixed effects models for repeated measures and examined correlations between alcohol use and EE and progestin levels. Results showed that women with higher EE levels reported increased alcohol consumption (r = 0.56, p = 0.01) and binge drinking (r = 0.45, p = 0.04) in the active pill phase. Progestin levels and pill phase were not significantly associated with alcohol consumption. These findings provide preliminary data suggesting increased levels of EE from OC pills are associated with excessive alcohol consumption in women. Further research is needed to determine if EE plays a causal role in increased alcohol consumption. This line of research could inform female-specific AUD prevention and treatment strategies among the large subpopulation of women using hormonal contraceptives.

Driving under the influence of cannabis and alcohol: Evidence from a national sample of young drivers

OBJECTIVE

Driving under the influence (DUI) of psychoactive substances is an important public health and criminal justice issue, impacting the lives of millions of Americans. Although recent research provides up-to-date information regarding DUI among adults, there is a pressing need for research that focuses specifically on younger/underage drivers. We draw from a large, nationally-representative sample to provide up-to-date evidence as to the prevalence and key criminal justice, substance use, and behavioral health correlates of DUI of cannabis and alcohol among drivers ages 16 to 20 in the United States.

METHODS

We used data from the 2020 and 2021 National Survey on Drug Use and Health (young drivers ages 16-20; N=12,863). All analyses-survey adjusted prevalence estimates, logistic regression-were conducted using Stata SE 17.0 and weighted to account for the study's stratified cluster sampling design.

RESULTS

The prevalence of DUI-cannabis for the full sample-including those not endorsing past-year use-was 6.3%. Among youth endorsing past-year cannabis use, 24.5% reported DUI of cannabis. In the full sample and among cannabis users, DUI-cannabis risk was elevated among older and male youth. The prevalence of DUI-alcohol was 2.6% among all youth and 6.1% among youth reporting past-year alcohol consumption.

CONCLUSIONS

Estimates indicate that more than one million young drivers each year are placing their lives and those of others at risk by operating motor vehicles after consuming cannabis and/or alcohol. Findings underscore the importance of prevention efforts targeting underaged cannabis and alcohol-impaired driving.