Electronic nicotine delivery system use is related to higher odds of alcohol and marijuana use in adolescents: Meta-analytic evidence

The impacts of product characteristics and regulatory environment on smokers' preferences for tobacco and alcohol: Evidence from a volumetric choice experiment

OBJECTIVE

Concurrent use of alcohol and cigarettes is well-documented in the literature. However, it is unclear how e-cigarette regulations in a growing number of localities impact the use of tobacco and alcohol in the US. This study aims to evaluate the impacts of excise taxes, tobacco use restrictions in restaurants/bars, and availability of alcohol flavor in e-cigarettes on tobacco consumption, and their cross impacts on alcohol consumption.

METHOD

A total of 181 US adult smokers who were using e-cigarettes and consuming alcohol participated in online volumetric choice experiments and reported on the quantity they would purchase among cigarettes, closed-system e-cigarettes, beer, and one other alcohol product (wine/liquor) under varying policy scenarios.

RESULTS

Estimated own-price elasticities of demand for beer, liquor/wine, and cigarettes were -0.10, -0.11, and -0.16, respectively (p <  0.001). Higher beer (cross-price elasticity =  0.13) and liquor/wine prices (cross-price elasticity =  0.05) increased e-cigarette consumption (p <  0.05). If e-cigarettes were allowed in bars/restaurants, their consumption increased by 2.4 units (p <  0.001), and if cigarettes were allowed in bars/restaurants, e-cigarette consumption increased by 1.9 units (p <  0.01), relative to the mean consumption level. Greater reported weekly spending on alcohol and/or tobacco was associated with higher consumption of all products (p <  0.001).

CONCLUSIONS

Higher taxes or prices may reduce the consumption of beer, liquor/wine, and cigarettes. E-cigarettes are economic substitutes for alcohol among smokers who are currently drinking and using e-cigarettes. Regulating tobacco indoor use will have an impact on e-cigarette consumption.

Exploring the Interplay of Sleep and Nicotine Vaping in Adolescents: An Evidence-Based Narrative Review

Introduction

Although adolescent use of combustible cigarettes (CC) has decreased, the rise of nicotine electronic vaping products (EVPs) presents new public health concerns. Nicotine vaping devices, with appealing packaging and flavors, are now the most commonly used nicotine delivery method among adolescents. While the long-term effects remain unclear, short-term effects include tachycardia, coughing, and wheezing. This review explores the relationship between nicotine vaping and sleep disturbances in adolescents.

Methods

A PubMed search (2006-2024) using keywords "nicotine sleep adolescents," "vaping sleep adolescents," and "e-cigarette sleep adolescents" identified 159 articles. Filters for "Humans," "English," and "Age-Birth-18 years" narrowed the list to 124. Abstracts were independently screened for cross-sectional studies describing sleep disturbances, yielding nine articles. Outcome measures included insufficient sleep (< 7-8 hours/night) and sleep latency, assessed through self-reported hours and the Pittsburgh Sleep Quality Index (PSQI).

Results

Data from 106,628 adolescents (12-18 years; males = females) revealed e-cigarette (most common vaping device used) and dual users (e-cigs + CC) reported significantly more insufficient sleep on school nights than non-users. Dual users exhibited increased sleep latency, particularly in males. Two studies suggested chronic insufficient sleep might lead to initiation or increased use of vaping devices, highlighting a bidirectional relationship.

Conclusions

Many survey studies indicate vaping nicotine is associated with sleep disturbances in adolescents. Other studies determined sleep disturbances were associated with an initiation or increase in vaping nicotine indicating a cause-and-effect conundrum. Further investigation through longitudinal studies are needed to determine factors such as the causal relationship, dose-response and product-specific effects.

Sex- and age-dependent impacts of nicotine and ethanol binge drinking on the brain: Insights from preclinical research

Electronic cigarette use among adolescents is a growing concern, not only due to the high incidence of co-use with other substances, such as alcohol, but also due to the fact brain is still maturing during this period. Combined exposure to alcohol and nicotine leads to plastic adaptation of crucial circuits in the brain, which can contribute to the development of addiction. It is well established that nicotine exposure can facilitate alcohol binge drinking, and vice-versa, in a sex-, age- and exposure-dependent manner. Nonetheless, the central mechanisms underlying the synergistic relationship between these two substances and the emergence of differential behavioural traits dependent on these factors remain underexplored. Preclinical studies continue to provide valuable insights into such mechanisms. Here, we discuss recent preclinical findings that report behavioural changes characteristic of addiction following nicotine consumption, primarily in models of vaping and alcohol use; and insights into the neural mechanisms impacted by intake of these two substances, with a focus on the adolescent brain.

Lifetime and active use of electronic cigarettes among Brazilian adolescents: The 2019 national school health survey - PeNSE 2019

OBJECTIVES

To investigate the prevalence and the factors associated with experimentation and use of e-cigarettes.

STUDY DESIGN

Cross-sectional study.

METHODS

Cross-sectional analysis of data from the National School Health Survey (PeNSE 2019), with students attending elementary school and high school in Brazil. Two outcomes were investigated: experimentation and last 30-day use of e-cigarettes. Potential exposures included family and adolescents' socio-demographic, mental health, and behavioral characteristics. Adjusted prevalence ratios (PR) were obtained by Poisson regression with robust variance.

RESULTS

133,237 adolescents aged ≥13 years were included. Prevalence of experimentation and last 30-day use was higher in males (20.7 % and 4.1 %, respectively) than in females (15.4 % and 2.6 %, respectively). The higher PR were with ever use of hookah in males (PR = 3.34 for e-cigarettes experimentation and PR = 4.05 for last 30-day use) and females (PR = 3.26 for experimentation and PR = 4.14 for last 30-day use). For males who ever used alcoholic beverages, the PR for e-cigarettes experimentation ranged from 2.86 to 3.18, and the PR for last 30-day use ranged from 3.09 to 3.39, depending upon the age of first alcoholic beverage experimentation. Among the females who ever used alcoholic beverages, PR for experimentation ranged from 3.46 to 4.31 and PR for last 30-day use ranged from 2.44 to 4.09.

CONCLUSION

About a quarter of school age adolescents had already tried e-cigarettes and 3.4 % used e-cigarettes in the prior 30 days. There were sex differences in the prevalence and in factors associated with experimentation and last 30-day use of e-cigarettes.

Recruiting Latino young adults into a vaping cessation study via social media: Feasibility and cost analysis

INTRODUCTION

This study aims to assess the feasibility and cost of recruiting young Latino adults (aged 18-25 years) to participate in a vaping cessation study via social media and to describe the baseline characteristics of participants enrolled via social media.

METHODS

Paid advertisements were launched using the Meta Ads platform, which serves ads to users on Facebook and Instagram. Key measures of audience targeting included ages 18-25 years, all genders, and the following interests: 'electronic cigarettes', 'vape', 'Latin pop', and 'Latin music'. The advertisements invited young Latino adults to join a text messaging vaping cessation study. By clicking on the advertisements, interested individuals were directed to a website to fill in a contact form. The study team contacted individuals who filled in the form, assessed them for study eligibility, and, if eligible, enrolled them in the study.

RESULTS

A total of 164 individuals completed the contact form, and 26 were successfully enrolled in the study. The enrollment efficiency ratio was 15.9% (26/164). The cost per enrollment was US$94.14. The participants' mean age was 22.7 years (SD=1.6). Half of the participants (50%) were male, 38.5% were female, and 11.5% were gender non-conforming/non-binary. Two-thirds of the participants (69.2%) were born in the US, 23.1% in Puerto Rico, and 7.7% in Mexico. Eight participants (30.7%) selected Spanish as their language of preference. In terms of the type of vaping device, 16 participants (61.5%) indicated using disposables, 6 (23.1%) cartridges/pods, and 4 (15.4%) tanks/refillable. Sixteen participants (61.5%) reported using marijuana in e-cigarettes. Six participants (23.1%) had high e-cigarette dependence. Twenty participants (76.9%) had attempted to quit e-cigarettes in the past year.

CONCLUSIONS

It is feasible to recruit young Latino adults for a vaping cessation study via social media. Social media offers a relatively low-cost approach to recruiting a diverse sample of Latino young adults who vape.

Development of a Vaping Cessation Text Messaging Intervention for Latino Young Adults: A Participatory Research Approach

OBJECTIVE

Describe the participatory research procedures of developing Kick Vaping, a vaping cessation text messaging intervention for Latino young adults, available in English and Spanish.

METHODS

Using community-based recruitment strategies, we convened a Community Advisory Board (CAB) of eight Latino young adults (ages 18-25) with different vaping experiences (never users, ex-users, and current users of e-cigarettes). Members held a series of working meetings to adapt Decídetexto, a smoking cessation text messaging intervention, for vaping cessation. Members provided iterative feedback on the text messages until reaching a consensus on content. Messages were translated from English to Spanish following a committee approach. Readability assessments were used to evaluate the legibility of the text messages.

RESULTS

At baseline, members' mean age was 22.6 years old (SD 3.1), 75% were female, and 50% used both English and Spanish equally. Three members (37.5%) were ex-users and one member (12.5%) was a current user of e-cigarettes. 18 meetings provided sufficient opportunities for iterative feedback on the text messages for developing the intervention. The Kick Vaping intervention consists of 208 text messages. Readability scores of the text messages in English were equivalent to fourth and fifth grade, and in Spanish were equivalent to easy and somewhat easy.

CONCLUSION

It is feasible and practical to build participatory research among Latino young adults focused on vaping cessation. Members of the CAB added innovation and creativity to the development of the vaping cessation text messaging intervention. Future research is needed to evaluate the impact of the intervention on vaping cessation.

Association of electronic nicotine delivery system (ENDS) and cigarette solo and dual use with alcohol-related consequences among US adults

INTRODUCTION

Research reports a robust association between combustible cigarette use and alcohol use frequency and severity. Extension to the emerging landscape of electronic nicotine delivery system (ENDS) use is needed to inform prevention and treatment strategies.

METHOD

We evaluated data from the 2020 National Survey on Drug Use and Health (NSDUH). Respondents included adults reporting cigarettes or ENDS solo or dual use. Multivariable logistic regression models evaluated associations with alcohol use disorder (AUD) and alcohol-related risky behavior (i.e., heavy drinking, binge alcohol use, and driving after drinking) compared to never use controls and respondents with a history, but not current, use of cigarettes or ENDS.

RESULTS

Multivariable models showed greater odds of AUD for respondents with dual ENDS and cigarette use (AOR = 10.2), ENDS use (AOR = 6.27), cigarette use (AOR = 4.45), and a history, but not ongoing, use (AOR = 2.60) relative to respondents with no use history. Similarly, respondents with dual use (AOR = 3.94), ENDS use (AOR = 2.41), and cigarette use (AOR = 1.71) had greater odds of AUD relative to those with a history of, but not ongoing, use. The association between dual use and AUD was greater for adults ages 21-25 (AOR = 16.2) than for adults over 25 (AOR = 7.82). Cigarette and ENDS solo and dual-use were similarly associated with greater odds of alcohol-related risky behavior relative to control groups.

CONCLUSION

These findings demonstrate that nicotine use and dual use may be associated with indicators of problematic drinking. These results offer insight into emerging licit polysubstance profiles and call for mechanistic research to inform prevention and intervention efforts.

Consequences of adolescent drug use

Substance use in adolescence is a known risk factor for the development of neuropsychiatric and substance use disorders in adulthood. This is in part due to the fact that critical aspects of brain development occur during adolescence, which can be altered by drug use. Despite concerted efforts to educate youth about the potential negative consequences of substance use, initiation remains common amongst adolescents world-wide. Additionally, though there has been substantial research on the topic, many questions remain about the predictors and the consequences of adolescent drug use. In the following review, we will highlight some of the most recent literature on the neurobiological and behavioral effects of adolescent drug use in rodents, non-human primates, and humans, with a specific focus on alcohol, cannabis, nicotine, and the interactions between these substances. Overall, consumption of these substances during adolescence can produce long-lasting changes across a variety of structures and networks which can have enduring effects on behavior, emotion, and cognition.

Housing status as a social determinant of disparities in adolescent smoking, vaping, and dual use of cigarettes and e-cigarettes

Little is known about how various housing situations among adolescents may be associated with differential patterns of smoking and vaping-information with practical relevance for tobacco prevention and control efforts. We analyzed disparities by housing status in past 30-day smoking, vaping, and dual use of cigarettes and e-cigarettes/vape products among adolescents participating in the population-based California Healthy Kids Survey (N = 931,355; 2017-2019). Generalized linear mixed models for a categorical outcome quantified differences in prevalence and adjusted odds ratios (AORs) of smoking only, vaping only, and dual use among adolescents in various housing situations relative to their peers living in a home with one or more parents/guardians or other relatives. Our findings suggest adolescents living in a friend's home; adolescents living in a hotel, motel, shelter, car, campground, or other transitional or temporary housing; and adolescents living in a foster home, group care, or waiting placement evidenced pronounced disparities in past 30-day smoking only (AORs: 3.16-3.40, ps < 0.0001) and dual use of cigarettes and e-cigarettes/other nicotine vape products (AOR: 3.73-5.83, ps < 0.0001) relative to their peers living in a home with one or more parents/guardians or other relatives. Vaping only disparities, although significant, were relatively smaller (AORs: 1.53-1.88, ps < 0.0001). These findings emphasize housing as a social determinant of smoking, vaping, and dual use disparities among adolescents and have implications for multilevel preventive intervention development.

Profile of Brazilian Undergraduates Who Use Electronic Cigarettes: a Cross-Sectional Study on Forbidden Use

The use of electronic cigarettes (e-cigarettes) persists in Brazil, despite restrictions on sales, imports, and advertising. This study aimed to identify the prevalence of e-cigarette use and user profiles among university students. This cross-sectional study used a convenience sample of 3083 university students (female = 2253, male = 830; M=26.1; SD =8.43) who completed an online survey. We employed logistic regression models and network analysis to determine the profile of e-cigarette users. The prevalence of e-cigarette use in the past year was 12.2% (n =377). Men, single individuals, Caucasians, secular individuals, and non-heterosexual individuals were more likely to engage in e-cigarette use. Intense use of alcohol, tobacco products, and illicit drugs increased the likelihood of e-cigarette use. Brazilian college students continue to use electronic cigarettes despite the prohibition. The pattern of alcohol abuse and tobacco product use among e-cigarette users is concerning. These risky behaviors render young and highly educated individuals targets for public policies to control and regulate electronic cigarettes in the country.

Sais de Nicotina e Nicotina Sintética: Novos Desafios para um Velho Problema

O tabagismo é reconhecido como uma doença crônica causada pela dependência à nicotina, presente nos produtos à base de tabaco, e está ligado a uma série de doenças tabaco-relacionadas. Somando-se a isso, é considerada uma doença pediátrica. No Brasil, o tratamento para a cessação do tabagismo desde 2004 é oferecido em todos os níveis de complexidade pelo Sistema Único de Saúde (SUS), contudo, os protocolos internacionalmente utilizados parecem ter limitações significativas quando utilizados em populações tabagistas de crianças e adolescentes. Os sais de nicotina apresentam um menor grau de irritação e impacto na boca e na garganta causado pela nicotina, possibilitando o uso de concentrações maiores de nicotina. A nicotina sintética tem se mostrado a cada dia mais viável economicamente falando e já existem no mercado produtos que se utilizam dessa forma de nicotina, entretanto, poucos estudos foram conduzidos no sentido de avaliar seus impactos à saúde. As novas formas de nicotina e sua forma sintética, associadas com produtos com design atraente, especialmente para os mais jovens, trazem desafios técnicos consideráveis para os profissionais da saúde, pois desconhece-se, no momento, protocolos eficazes para tratar a dependência à nicotina originada dessas novas formas de consumo.

A pilot feasibility study of a behavioral intervention for nicotine vaping cessation among young adults delivered via telehealth

BACKGROUND

Nicotine vaping among youth has increased, warranting concern from tobacco control proponents. Many youth who vape indicate interest in quitting; however, few empirically supported vaping cessation interventions exist. This pilot feasibility study adapted an established behavioral intervention, contingency management (CM), delivered via telehealth to promote vaping cessation among young adults.

METHODS

Participants (N = 27; ages 17-21) vaping nicotine regularly were recruited via social media and digital advertisements from across the US (June 2020-January 2021). Participants were randomized at approximately 4:1 to CM or Monitoring control (22:5). CM was delivered through DynamiCare Health's smartphone app for 4 weeks, in which financial incentives were delivered contingent on abstinent cotinine samples after the quit day until the end of treatment (EOT; Days 7-28; 10 expected submissions). Control participants earned incentives for submitting cotinine, regardless of abstinence. Feasibility, acceptability, and abstinence was collected throughout treatment, at EOT, and at 1-month follow-up.

RESULTS

The majority of enrolled participants completed treatment (Monitoring: 5/5; CM: 20/22), and intervention components were rated favorably overall (> 80%). CM participants submitted 112/220 (55%) abstinent cotinine samples throughout the quit attempt, while the Monitoring group submitted 4/50 (8%) negative samples. There were no differences in abstinence between groups at EOT or follow-up.

CONCLUSION

This pilot study of a telehealth-based youth vaping cessation intervention demonstrated preliminary feasibility and acceptability. These results suggest that CM for young adult vaping cessation, delivered remotely, is a promising direction for future work and fully powered trials are warranted to assess intervention efficacy.

Exploring Patterns of the Use of Electronic Nicotine Delivery Systems among Adolescents in High-Risk Appalachian (U.S.A) Communities

Background: Electronic nicotine delivery systems (ENDS) use among adolescents in the United States (U.S.) has surpassed conventional tobacco products (CTPs), including cigarettes. Increasingly, ENDS are used concurrently with CTPs and substances such as cannabis. However, few studies involve Central Appalachia, a region with historically high rates of tobacco and other substance use. Objective:  To examine prevalence of concurrent use of ENDS and cannabis among school-going adolescents in Appalachian Tennessee and delineate associations between ENDS use and substance-related risk behavior (cannabis use), social relations (peer use), and school-related risk behavior (academic performance). Methods: Data were obtained from a survey conducted with youth aged 13-17 years in 2018 in a county in Appalachian Tennessee (n = 280). A multivariable logistic regression model was fit to evaluate associations between ENDS and cannabis use, and other factors. Results: Overall, lifetime ENDS and cannabis prevalence estimates were 31.1% and 18.6%, respectively. Lifetime ENDS users had increased odds of also being lifetime cannabis users [OR = 9.22, 95% confidence interval (CI): 3.44-24.75]. Lifetime ENDS users had increased odds of reporting ENDS use among peers [OR = 12.11; 95% CI: 5.40-27.12] and lower academic performance (OR associated with mostly C or D vs. A grades was 4.28, 95% CI: 1.68-10.90). Conclusion: This study found an association between ENDS and cannabis use among adolescents in Appalachian Tennessee exists. Additionally, peer use and academic performance were associated with ENDS use. The findings have implications for public health intervention planning to address not only ENDS but also substance use among Appalachian youth.

Expectancies for and Pleasure from Simultaneous Alcohol and E-Cigarette Use among Young Adults

Background: Young adults' use of alcohol and e-cigarettes are of public health concern, as they report among the highest prevalence for use of both substances. Many young adults use alcohol and e-cigarettes simultaneously (i.e., at the same time with overlapping effects) despite heightened risk for adverse effects. Objectives: This study assessed simultaneous use expectancies and changes in pleasure from e-cigarettes as a function of alcohol consumption and simultaneous use frequency. Participants (N = 408; Mage = 23.64 years; 52.7% female) recruited through Amazon MTurk completed measures of alcohol and e-cigarette use, and expectancies, pleasure and frequency of simultaneous use. Results: Separate linear regression models revealed that alcohol consumption was positively associated with expectancies for simultaneous use of e-cigarettes/alcohol and pleasure from simultaneous use (ps ≤ .015). As individuals engaged in simultaneous use more frequently, they also reported greater expectancies for, and increased pleasure from, simultaneous use (ps < .001). Conclusions/Importance: Expectancies for simultaneous use may be greatest among young adults who consume more alcohol and engage in simultaneous use more frequently. Increased pleasure from e-cigarettes while drinking suggests that positive reinforcement may be implicated in simultaneous use patterns. Future research should examine the role of pleasure in simultaneous use trajectories.

Epigenetic Analyses of Alcohol Consumption in Combustible and Non-Combustible Nicotine Product Users

Alcohol and tobacco use are highly comorbid and exacerbate the associated morbidity and mortality of either substance alone. However, the relationship of alcohol consumption to the various forms of nicotine-containing products is not well understood. To improve this understanding, we examined the relationship of alcohol consumption to nicotine product use using self-report, cotinine, and two epigenetic biomarkers specific for smoking (cg05575921) and drinking (Alcohol T Scores (ATS)) in n = 424 subjects. Cigarette users had significantly higher ATS values than the other groups (p < 2.2 × 10⁻¹⁶). Using the objective biomarkers, the intensity of nicotine and alcohol consumption was correlated in both the cigarette and smokeless users (R = −0.66, p = 3.1 × 10⁻¹⁴; R² = 0.61, p = 1.97 × 10⁻⁴). Building upon this idea, we used the objective nicotine biomarkers and age to build and test a Balanced Random Forest classification model for heavy alcohol consumption (ATS > 2.35). The model performed well with an AUC of 0.962, 89.3% sensitivity, and 85% specificity. We conclude that those who use non-combustible nicotine products drink significantly less than smokers, and cigarette and smokeless users drink more with heavier nicotine use. These findings further highlight the lack of informativeness of self-reported alcohol consumption and suggest given the public and private health burden of alcoholism, further research into whether using non-combustible nicotine products as a mode of treatment for dual users should be considered.

Vaping disparities at the intersection of gender identity and race/ethnicity in a population-based sample of adolescents

BACKGROUND

Transgender adolescents use vape products (e.g., e-cigarettes) at higher rates than cisgender adolescents. Little is known about how these disparities differ from the intersectional perspective of both gender identity and race/ethnicity.

METHODS

We examined disparities in past 30-day vaping frequency at the intersection of gender identity and race/ethnicity among adolescents participating in two pooled waves of the population-based California Healthy Kids Survey (N=953,445; 2017-19). Generalized linear mixed models included gender identity-by-race/ethnicity interactions and adjusted for potential confounders. Stratified models quantified relationships between gender identity and vaping within race/ethnicity strata and between race/ethnicity and vaping within gender identity strata.

RESULTS

Transgender adolescents of color were more likely to report a higher frequency of vaping than cisgender white adolescents. In models stratified by race/ethnicity, transgender adolescents evidenced greater odds of more frequent vaping than cisgender adolescents of the same race/ethnicity; disparities were greatest between transgender and cisgender Black adolescents (adjusted odds ratio [AOR]: 6.05, 95% CI: 4.76-7.68) and smallest between transgender and cisgender white adolescents (AOR: 1.20, 95% CI: 1.06-1.35). In models stratified by gender identity, disparities were greatest between transgender Black and transgender white adolescents (AOR: 2.85, 95% CI: 2.20-3.70) and smallest between transgender multiracial and white adolescents (AOR: 1.28, 95% CI: 1.05-1.58). Similar, though less consistent, patterns emerged for adolescents of color unsure of their gender identity relative to cisgender white adolescents.

CONCLUSION

Transgender adolescents of color may be especially vulnerable to vaping disparities. Future research should identify and intervene on causal mechanisms undergirding disparities.

IMPLICATIONS

Research finds that transgender adolescents use vape products at higher rates than their cisgender peers, however, little is known about how patterns of adolescent vaping may differ by both gender identity and race/ethnicity-information needed to inform culturally-tailored prevention and control initiatives to decrease adolescent vaping disparities. Our analysis of data from a population-based adolescent health survey finds evidence of magnified disparities in vaping frequency among transgender adolescents of color.

Electronic cigarette and cannabis use: results from the 2018 Maryland Youth Risk Behavior Survey

OBJECTIVE

To determine the relationship between lifetime e-cigarette use and current cannabis use among youth. Our analyses accounted for county variability, in addition to student-level covariates.

METHODS

This study examined responses from high school students on a state-level population survey, the 2018 Maryland Youth Risk Behavior Survey/Youth Tobacco Survey, a cross-sectional, complex survey sample. Of participating students, final analyses included an unweighted sample of 41,091 9th to 12th grade students who provided complete reports for measured variables. Analyses with survey weights were conducted between August 2019 and May 2020. A multivariable logistic regression was conducted to investigate the association between lifetime e-cigarette use and current (past 30-day) cannabis use, after controlling for county, lifetime cigarette use, current (past 30-day) alcohol use, emotional distress, and demographics.

RESULTS

Lifetime e-cigarette use significantly increased the odds of current cannabis use among Maryland high school students (aOR = 6.04; 95% CI 5.27, 6.93). Other significant risk factors for current cannabis use included lifetime cigarette use (aOR 2.23, 95% CI 1.86, 2.68) and current alcohol use (aOR 5.21, 95% CI 4.42, 6.14). Significantly higher odds of current cannabis use were also found among older high school students, males, non-Hispanic Blacks and students identifying as other race, and those reporting emotional distress.

CONCLUSIONS

Lifetime e-cigarette use among Maryland high school students is strongly associated with current cannabis use when including counties as a covariate. Non-significant county differences, however, suggest smaller geographical units may be required to control for variability. Efforts should focus on reducing youth e-cigarette use to decrease cannabis use. Maryland's recent implementation of Tobacco 21 and a ban on flavored e-cigarettes will be of interest for future evaluations.

Combustible and electronic cigarette use and insufficient sleep among U.S. high school students

The study aimed to investigate the relationships between current exclusive e-cigarette use, exclusive combustible cigarette smoking, and dual use of e-cigarettes and combustible cigarettes, and insufficient sleep among U.S. adolescents. We conducted a secondary data analysis of the 2017 Youth Risk Behavior Survey including 11,296 U.S. high school students. Current (past 30-day) tobacco use groups included exclusive e-cigarette users, exclusive combustible cigarette smokers, and dual-product users. We performed weighted unadjusted and adjusted logistic regression analyses. Insufficient sleep was defined as <8 h/night and < 7 h/night. Overall, 73.4% of adolescents reported insufficient sleep <8 h/night. Compared with non-tobacco users, exclusive e-cigarette users were more likely to report insufficient sleep <8 h/night (odds ratio [OR] = 1.55, 95%CI = 1.12-2.14; adjusted OR [aOR] = 1.57, 95%CI = 1.01-2.43) and < 7 h/night (OR = 1.55, 95%CI = 1.19-2.01; aOR = 1.61, 95%CI = 1.16-2.24). Dual-product users were at increased odds to report insufficient sleep <8 h/night (OR = 3.15, 95%CI = 1.87-5.32) and < 7 h/night (OR = 2.64, 95%CI = 1.87-3.72; aOR = 1.73, 95%CI = 1.14-2.62) than non-tobacco users. Exclusive combustible cigarette smokers were less likely to report insufficient sleep <8 h/night (aOR = 0.49, 95%CI = 0.29-0.84) than non-tobacco users, but no differences were found based on insufficient sleep <7 h/night. When comparing current use groups, exclusive e-cigarette users were at 3.20 increased odds (95%CI = 1.65-6.22) and dual-product users were at 3.26 increased odds (95%CI = 1.51-7.03) to report insufficient sleep <8 h/night when compared with exclusive combustible cigarette smokers after covariate adjustment. Dual-product users were 1.89 times more likely (95%CI = 1.01-3.51) to report insufficient sleep <7 h/night when compared with exclusive combustible cigarette smokers. School-based prevention efforts for tobacco use may promote sufficient sleep in youth.

Combined nicotine and ethanol age-dependently alter neural and behavioral responses in male rats

Use of alcohol (EtOH) and nicotine (Nic) typically begins during adolescence. Smoking and drinking often occur together and lead to a higher consumption of alcohol. Although we have shown that Nic+EtOH is reinforcing in self-administration tests in adolescent male rats, whether Nic+EtOH affects other behaviors or neuronal activity in an age-dependent manner is unknown. To address this, adolescent and adult male rats were given intravenous injections of Nic (30 µg/kg)+EtOH (4 mg/kg) and evaluated for locomotor and anxiety-like behaviors. Regional neuronal activity, assessed by cFos mRNA expression, was measured and used to evaluate functional connectivity in limbic regions associated with anxiety and motivation. Nic+EtOH increased locomotor activity and was anxiolytic in adolescents, but not adults. The posterior ventral tegmental area (pVTA), a critical regulator of drug reward, was selectively activated by Nic+EtOH in adults, while activity in its target region, the NAc-shell, was decreased. Drug-induced alterations in functional connectivity were more extensive in adults than adolescents and may act to inhibit behavioral responses to Nic+EtOH that are seen in adolescence. Overall, our findings suggest that brief, low-dose exposure to Nic+EtOH produces marked, age-dependent changes in brain and behavior and that there may be an ongoing maturation of the pVTA during adolescence that allows increased sensitivity to Nic+EtOH's reinforcing, hyperlocomotor, and anxiolytic effects. Furthermore, this work provides a potential mechanism for high rates of co-use of nicotine and alcohol by teenagers: this drug combination is anxiolytic and recruits functional networks that are unique from protective, inhibitory networks recruited in the mature and adult brain.

An Experimental Test of the Relationship between Electronic Nicotine Delivery System Use and Alcohol Consumption

BACKGROUND

Increasing research shows that the use of electronic nicotine delivery systems (ENDS) is associated with a higher rate and quantity of alcohol consumption.

METHODS

The present study used a 2-session, within-subjects design to experimentally examine the relationship between ENDS use and laboratory ad libitum alcohol consumption. A total of N = 31 (mean age = 28.71, SD = 11.17; 45.2% women; 54.8% White/Caucasian) healthy adults from the community who use ENDS and endorsed liking beer completed the study, which included a beer consumption taste-test task that assessed the volume of beer consumed by the participants across 2 counterbalanced sessions: 1 in which concurrent ENDS use was allowed and 1 in which it was not. All analyses controlled for age, race, and gender.

RESULTS

The effect of ENDS condition on the volume of beer consumed was not statistically significant, F(1, 30) = 0.03, p = 0.86). Results of linear mixed modeling showed that ENDS puffs were significantly related to alcohol sips (estimate = 0.23, SE = 0.07, p = 0.002) across the ad libitum session.

CONCLUSIONS

Overall, ENDS use did not increase alcohol consumption; however, the data suggest that ENDS puffs might act as a prime for beer sips or that these 2 behaviors are linked through habit. Future studies should more fully measure and compare global and event-level data on ENDS and alcohol use as they might show disparate patterns of relationships.

Financial strain and electronic nicotine delivery systems use among U.S. young adults: A longitudinal panel analysis, 2013-2018

INTRODUCTION

Financial strain is associated with an increased likelihood of cigarette smoking, but less is known about its association with electronic nicotine delivery systems (ENDS) use. This study examined longitudinal associations of financial strain with ENDS use behaviors among young adults.

METHODS

We analyzed in 2020 four waves (2013-2018) of the Population Assessment of Tobacco and Health, a nationally representative longitudinal study. A total of 5740 U.S. young adults (aged 18-24 years at baseline) had matched data for all four waves. We used generalized linear mixed modeling which accounts for correlations between repeated measures. Weighted logistic regressions assessed the association between financial strain and three different types of ENDS use behaviors (i.e., everyday, some-day, and experimental use), adjusting for major confounders including poverty, mental health symptoms, and other substance use behaviors.

RESULTS

Frequency and proportion of everyday ENDS use showed a linear increase over time whereas some-day and experimental uses showed quadratic trends, increasing with a peak at Wave 2 and then decreasing over time. Financial strain prospectively predicted some-day (adjusted odds ratio [AOR] = 1.32; 95% CI = 1.03-1.69) and experimental (AOR = 1.25; 95% CI = 1.02-1.52) ENDS use, but not everyday use.

CONCLUSIONS

The findings of the current study indicate the need for distinctly different approaches for non-daily ENDS users from daily users. Our findings further suggest that ENDS use prevention and cessation efforts should consider financial strain of young adults particularly for non-daily users to thwart them from progressing towards nicotine dependence and long-term use.

Electronic Cigarette Use and Its Relationship with Smoking and Alcohol and Illicit Drug Consumption among Romanian University Students

Background and objectives: This study assesses electronic cigarette (e-cigarette) use and its relationship with smoking and alcohol and illicit drug consumption among Romanian university students. Materials and methods: A cross sectional study using anonymous questionnaire was performed in 2017 among 400 university students from Cluj-Napoca, Romania. Results: 95.5% of the participants had heard about e-cigarettes and 43.7% of these had tried e-cigarettes during their lifetime, while 8.9% declared using cigarettes in the previous month (one out of five students who had tried them during their lifetime). Half of the students had smoked during their lifetime and one third had smoked in the previous month. Eighty-five percent of participants had experimented alcohol intoxication during their lifetime and 45% had done so in the previous month, while illicit drug use during their lifetime and the previous month was 34% and 9.5%, respectively. The results of the linear regression analyses show a positive correlation between e-cigarette use, smoking, experimentation with alcohol intoxication, and the use of illicit drugs. Conclusions: Future studies as well as educational activities should address the complex relationship between e-cigarette and other substance use among Romanian youth.

E-cigarette use and concurrent risk behaviors among adolescents

PURPOSE

Although electronic cigarette (e-cigarette) use is on the rise among adolescents, its relationship with risk behaviors is unclear. This study aimed to examine whether e-cigarette use was related to other risk behaviors and whether age and sex play a role in those associations.

METHODS

Data from the 2017 Youth Risk Behavior Surveillance System was used. Weighted logistic regression analysis was conducted to examine the relationships among variables of interest.

FUNDINGS

The results showed that e-cigarette users, compared to nonusers, had higher odds of using other types of substances, as well as being involved in other risk behaviors including driving-related behaviors, sexual activity-related behaviors, and violence-related behaviors. Furthermore, some of these relationships are moderated by age and sex.

DISCUSSION

Our findings suggest that e-cigarette use is linked to other risk behaviors among adolescents. Policy makers and educators should address multiple risk behaviors as part of comprehensive tobacco-free policies and youth substance use prevention programs.

The broader impact of new trends in adolescent substance use: A special section editorial summary

The focus of this special section of Addictive Behaviors is on how new trends in substance use have a broader impact on youth development, most notably on the use of other substances or psychosocial functioning. These eight articles focus on recent changes in the prevalence of e-cigarettes, stimulants, and prescription opiates as well as the implications of changing legislation for recreational marijuana use. These studies also focus on how using these substances is associated with continued use of the same and other forms of drugs, advertising trends, and psychosocial functioning. This editorial summarizes these articles and offers key directions for future research.