E-Cigarette Health Harm Awareness and Discouragement: Implications for Health Communication

In Utero Exposure to Maternal Electronic Nicotine Delivery System use Demonstrate Alterations to Craniofacial Development

OBJECTIVE

Develop a model for the study of Electronic Nicotine Device (ENDS) exposure on craniofacial development.

DESIGN

Experimental preclinical design followed as pregnant murine dams were randomized and exposed to filtered air exposure, carrier exposure consisting of 50% volume of propylene glycol and vegetable glycine (ENDS Carrier) respectively, or carrier exposure with 20 mg/ml of nicotine added to the liquid vaporizer (ENDS carrier with nicotine).

SETTING

Preclinical murine model exposure using the SciReq exposure system.

PARTICIPANTS

C57BL6 adult 8 week old female pregnant mice and exposed in utero litters.

INTERVENTIONS

Exposure to control filtered air, ENDS carrier or ENDS carrier with nicotine added throughout gestation at 1 puff/minute, 4 h/day, five days a week.

MAIN OUTCOME MEASURES

Cephalometric measures of post-natal day 15 pups born as exposed litters.

RESULTS

Data suggests alterations to several facial morphology parameters in the developing offspring, suggesting electronic nicotine device systems may alter facial growth if used during pregnancy.

CONCLUSIONS

Future research should concentrate on varied formulations and exposure regimens of ENDS to determine timing windows of exposures and ENDS formulations that may be harmful to craniofacial development.

Susceptibility to e-cigarette among high school students: a study based on the ecological model of health behavior

Introduction

Youth e-cigarette (EC) use has rapidly increased in the last few years. It is crucial to identify the susceptible youth and prevent them from EC uptake. This study was conducted to investigate factors that affect youth susceptibility to EC use.

Methods

This study employed a cross-sectional survey design, utilizing multi-center stratified cluster sampling method to select two junior high schools and two senior high schools in Shanghai, Guangzhou, and Chengdu. One-third of classes of each grade in the selected schools were involved in this survey. After obtaining the informed consent of parents, an anonymous and self-administered questionnaire was distributed to students. Questionnaire was designed based on the Ecological Models of Health Behavior. Associations between EC susceptibility and covariates were identified using multivariate logistic regression.

Results

Among 2,270 students who had never vaped, 38.0% were susceptible to ECs. Logistic regression analysis identified factors on different levels affecting the susceptibility. Individual factors included senior high school students (OR = 1.34, 95% CI: 1.08-1.65), sensation seeker (OR = 1.11, 95%CI: 1.08-1.14), poor academic performance (OR = 1.24, 95% CI: 1.01-1.54), ever cigarette user (OR = 2.27, 95% CI: 1.29-4.01), unaware of the second-hand smoke from vaping (OR = 1.56, 95% CI: 1.25-1.96), agreeable with "I do not want to hang around vapers" (OR = 0.79, 95% CI: 0.64-0.97), agreeable with "ECs are more fashionable than cigarette" (OR = 2.50, 95% CI: 1.72-3.62) and favorable attitudes toward vaping (OR = 5.09, 95% CI: 3.78-6.85) were significantly associated with susceptibility to ECs. At interpersonal level, students who believe they would not be punished by parents for vaping increased susceptibility (OR = 1.27, 95% CI:1.01-1.59). At community level, exposure of EC advertising (OR = 1.81, 95% CI:1.46-2.25), exposure to hazard information (OR = 0.76, 95% CI: 0.59-0.97) and seeing vaping in daily life (OR = 2.11, 95% CI: 1.62-2.74), were statistically significantly associated with youth susceptibility to ECs.

Conclusion

EC susceptibility was observed in a substantial proportion of adolescents who had never vaped, influenced by factors on different levels. This research underscores the urgent need for comprehensive intervention strategies to prevent the youth susceptibility to ECs.

Noticing Voluntary E-Cigarette Warning Labels and Associations With Harm Perceptions and Use Intentions: A Baseline Cross-Sectional Analysis of Wave 4 of the Population Assessment of Tobacco and Health Study Prior to the Food and Drug Administration Mandate

PURPOSE

To examine the effect of e-cigarette warning labels (EWLs) prior to the August 2018 FDA-warning label mandate to establish a baseline for future research.

DESIGN

Cross-sectional survey.

SETTING

United States.

PARTICIPANTS

A cohort of adult participants in the Population Assessment of Tobacco and Health (PATH) study (n = 30,004) at Wave 4 (Dec 2016-Jan 2018).

MEASURES

Correlates (e.g., sociodemographics, substance use, social influence, cigarette warnings, and mental health) of noticing EWLs in the past 30-days (noticed vs did not notice), perceived harm of e-cigarettes/nicotine (from 1 = not at all harmful to 5 = extremely harmful), relative harm of e-cigarettes (from 1 = less harmful to 3 = more harmful than cigarettes), intention to quit (yes/no) and intention to try e-cigarettes (from 1 = definitely not to 4 = definitely yes).

RESULTS

The prevalence of noticing EWLs was 22.1%. Those who currently use electronic nicotine products, established and experimentally, were more likely to notice EWLs relative to never users (aOR = 3.55; 95% CI: 2.96-4.25; P < .001 and aOR = 2.42; 95% CI: 1.88-3.10; P < .001, respectively). Those with past 30-day alcohol and cigarette use were less likely to notice EWLs (aOR = .27; 95% CI: .24-.31 and aOR = .91; 95% CI: .83-.99; respectively). Those who noticed cigarette warnings were more likely to notice EWLs (aOR = 12.00; 95% CI: 10.46-13.77; P < .001). Among those who noticed EWLs, there were higher odds of perceiving e-cigarettes to be equally or more harmful than cigarettes (aOR = 1.15; 95% CI: 1.02-1.30), but no association was found between noticing EWLs and perceived harm of e-cigarettes/nicotine or use intentions.

CONCLUSION

Noticing voluntary EWLs was not associated with increased perceived harm of e-cigarettes and nicotine harm, or e-cigarette use intentions. Future research is warranted to examine the effect of the FDA mandated EWLs.

Identifying promising themes and messages for youth vaping prevention: A national study

Use of e-cigarettes and vapes among adolescents continues to be a major public health concern. Health communication efforts can discourage e-cigarette use among adolescents by influencing beliefs and behavior. However, to do so, studies need to identify the most promising themes and messages based on the latest evidence about the harms of e-cigarettes and vaping. Participants were a nationally representative sample of 1,603 US adolescents aged 13-17 years, recruited in the summer of 2022. Adolescents were randomly assigned to view 7 vaping prevention statements (one from each theme: nicotine addiction, chemical harms, health symptoms, mental health, organ effects, cosmetic effects, and monetary cost) and 1 control statement (vape litter theme) from a pool of 46 statements that were developed through a systematic process. Participants rated each statement on perceived message effectiveness (PME), awareness, and believability. Results of linear mixed models indicated that all vaping prevention themes out-performed control messages on PME, with chemical harms and organ effects having the largest effects, followed by nicotine addiction and then other themes. For most message themes, PME effects were stronger for youth susceptible to vaping compared to non-susceptible youth and users. Both awareness and believability predicted higher levels of PME. In secondary analyses, we found that statements specifying the target ("you") and longer statements were also rated higher on PME. Results suggests that the most potent vaping prevention messages for adolescents are those that focus on vape chemicals and the potential of vaping to damage organs and increase disease risk.

The potential impact of removing a ban on electronic nicotine delivery systems using the Mexico smoking and vaping model (SAVM)

Objective

To develop the Mexico Smoking and Vaping Model (Mexico SAVM) to estimate cigarette and electronic nicotine delivery systems (ENDS) prevalence and the public health impact of legalizing ENDS use.

Methods

SAVM, a cohort-based discrete-time simulation model, compares two scenarios. The ENDS-Restricted Scenario estimates smoking prevalence and associated mortality outcomes under the current policy of an ENDS ban, using Mexico-specific population projections, death rates, life expectancy, and smoking and e-cigarette prevalence. The ENDS-Unrestricted Scenario projects smoking and vaping prevalence under a hypothetical scenario where ENDS use is allowed. The impact of legalizing ENDS use is estimated as the difference in smoking- and vaping-attributable deaths (SVADs) and life-years lost (LYLs) between the ENDS-Restricted and Unrestricted scenarios.

Results

Compared to a national ENDS ban, The Mexico SAVM projects that legalizing ENDS use could decrease smoking prevalence by 40.1% in males and 30.9% in females by 2049 compared to continuing the national ENDS ban. This reduction in prevalence would save 2.9 (2.5 males and 0.4 females) million life-years and avert almost 106 (91.0 males and 15.5 females) thousand deaths between 2025 and 2049. Public health gains decline by 43% to 59,748 SVADs averted when the switching rate is reduced by half and by 24.3% (92,806 SVADs averted) with a 25% ENDS risk level from that of cigarettes but increased by 24.3% (121,375 SVADs averted) with the 5% ENDS risk.

Conclusions

Mexico SAVM suggests that greater access to ENDS and a more permissive ENDS regulation, simultaneous with strong cigarette policies, would reduce smoking prevalence and decrease smoking-related mortality. The unanticipated effects of an ENDS ban merit closer scrutiny, with further consideration of how specific ENDS restrictions may maximize public health benefits.

Building consensus on a set of ENDS-specific pictorial health warnings: a Delphi study among a tobacco control expert panel

BACKGROUND

This study reports on the development of pictorial health warning labels for electronic nicotine delivery system (ENDS) using the Delphi approach with a panel of tobacco control experts. Twenty-four evidence-based ENDS-specific warnings corresponding to three themes (toxicity, health risks and specific harm) were developed and used in the Delphi study.

METHODS

We conducted a three-round online Delphi study among 60 experts (55% female) between June 2022 and April 2023. We balanced the panel in areas of expertise and positions relevant to ENDS (risks, benefits). In round 1, participants rated the warnings on attention, relevance to evidence and perceived effectiveness (harm perception, motivation to quit) and provided suggestions for improvement. In rounds 2 and 3, participants ranked the revised warnings based on importance in each theme. We assessed levels of agreement between participants using interquartile deviations and medians.

RESULTS

Warnings in theme 1, toxicity, received the highest ratings for perceived effectiveness on harm perception and encouraging quitting ENDS (p<0.05). Experts recommended using clear and affirmative text paired with emotion-provoking pictures and avoiding the rare side effects of ENDS. Most of the top-ranked warnings were from theme 3, ENDS-specific harm, pertained to lung damage, dual use of ENDS and cigarettes, nicotine addiction among youth, anti-ENDS industry sentiment and toxicity.

DISCUSSION

This study developed 24 evidence-based ENDS health warning labels using a systematic process that included several rounds of expert panel feedback. These warnings can be used to advance ENDS prevention and tobacco control policies and further target different populations.

Framing Effects in Youth E-Cigarette Use Prevention: Individual Text Messages Versus Simulated Text Exchanges

Electronic cigarettes are the most widely used tobacco product among youth in the United States. Although rapidly growing, research on effective message strategies for e-cigarette use prevention is still limited. This study examined the relative effectiveness of gain framing versus loss framing in youth-targeting prevention text messages delivered either as individual expository texts or simulated text exchanges between a youth patient and a pediatrician. A national sample of 1,084 youth susceptible to future e-cigarette use was randomized to condition in an online message testing experiment featuring a 2 (framing: gain vs. loss) × 2 (format: individual texts vs. simulated exchange) factorial design. Results revealed a consistent interaction between framing and messaging format in message liking, positive affect, attitude toward e-cigarette use, and future e-cigarette use intentions. The gain frame outperformed the loss frame in the simulated exchange conditions while the reverse trend was true for the individual text conditions. Furthermore, the main effect of messaging format was significant on multiple outcomes in favor of simulated text exchanges. The main effect of framing was only significant on negative affective response with the loss frame eliciting stronger responses. These findings suggest that the relative effectiveness of gain framing versus loss framing depends on how messages are presented in youth-targeting text messaging interventions. When messages are likely to be delivered in a discrete manner, the loss frame should be preferred. When greater interactivity and narrative development are possible, the gain frame should be favored. E-cigarette prevention efforts should leverage these insights to enhance message effectiveness.

The impacts of electronic cigarette health warning labels on use intentions and perceptions: A cross-sectional study of US and Israeli adults who use tobacco

Background

Health warning labels (HWLs) are evidence-based tobacco control strategies; however, their application to e-cigarettes and related impacts (e.g. on perceived risk), including across countries with different regulations, are understudied.

Design and Methods

Using 2021 survey data from 927 US and Israeli adults reporting past-month tobacco use, multivariate analyses examined: (1) sociodemographics in relation to self-reported impact of e-cigarette HWLs (i.e. more concerned about e-cigarette use, reassured, no effect) among those who noticed e-cigarette HWLs (multinomial regressions); and (2) HWL impacts in relation to use intentions and perceived addictiveness and harm (linear regressions).

Results

Among those who noticed HWLs (n = 835, 90.1%), 34.1% reported HWLs resulted in greater concern about e-cigarette use, 45.5% no effect, and 20.4% reassurance. Factors associated with greater concern (vs no effect) included e-cigarette non-use (vs use; aOR = 1.69, 95% CI:1.22, 2.38), US (vs Israel) resident (aOR = 1.65, 95% CI:1.16, 2.34), age 18-25 (vs 36-45; aOR = 1.72, 95% CI:1.11, 2.67), and more education (aOR = 1.85, 95% CI:1.30, 2.63). Factors associated with being reassured (vs no effect) included use of cigarettes (aOR = 1.71, 95% CI:1.06, 2.75), e-cigarettes (aOR = 2.64, 95% CI:1.77, 3.94), and other tobacco (aOR = 2.11, 95% CI:1.39, 3.21), and Israeli resident (aOR = 2.33, 95% CI:1.47, 3.70). Not noticing HWLs (vs no effect) correlated with lower intentions (β = -0.44, 95% CI:-0.87, -0.01), perceived addictiveness (β = -0.61, 95% CI:-1.05, -0.18), and harm (β = -0.56, 95% CI:-0.95, -0.18); reassurance correlated with greater use intentions (β = 0.48, 95% CI:0.12, 0.83); and greater concern was unassociated with use intentions or perceived risk.

Conclusion

Effects of differing e-cigarette HWLs in distinct subpopulations warrant research. Despite being noticed, they may have no effect or encourage e-cigarette use.

Promotion of E-Cigarettes on TikTok and Regulatory Considerations

E-cigarettes are promoted extensively on TikTok and other social media platforms. Platform policies to restrict e-cigarette promotion seem insufficient and are poorly enforced. This paper aims to understand how e-cigarettes are being promoted on TikTok and provide insights into the effectiveness of current TikTok policies. Seven popular hashtag-based keywords were used to identify TikTok accounts and associated videos related to e-cigarettes. Posts were independently coded by two trained coders. Collectively, the 264 videos received 2,470,373 views, 166,462 likes and 3426 comments. The overwhelming majority of videos (97.7%) portrayed e-cigarettes positively, and these posts received 98.7% of the total views and 98.2% of the total likes. A total of 69 posts (26.1%) clearly violated TikTok's own content policy. The findings of the current study suggest that a variety of predominantly pro-vaping content is available on TikTok. Current policies and moderation processes appear to be insufficient in restricting the spread of pro-e-cigarette content on TikTok, putting predominantly young users at potential risk of e-cigarette use.

Designing Effective Alcohol Warnings: Consumer Reactions to Icons and Health Topics

Introduction

New warning labels for alcohol could reduce alcohol-related health harms. This study examined consumer responses to alcohol warnings with different designs.

Methods

A national sample of 3,051 U.S. adults completed an online survey in August 2021. Participants were randomized to 1 of 4 warning topics (addiction, liver damage, early death, or colon cancer). Participants viewed 3 labels, presented in random order: 2 types of warning labels (text-only and icon) showing a newly developed warning message about their assigned topic and a text-only control label showing a neutral message. Participants rated each label on effectiveness at discouraging alcohol consumption (primary outcome) and attention (secondary outcome) using 1 to 5 Likert-type scales. Participants also rated warnings with different causal language variants (e.g., "increases risk of," "contributes to") and marker words (e.g., "WARNING," "SURGEON GENERAL WARNING").

Results

Both the text-only and icon warnings were perceived as more effective (Average Differential Effects [ADEs]=0.79 and 0.86, respectively) and more attention-grabbing (ADEs=0.43 and 0.69, respectively) than control labels (all ps<0.001). The icon warnings were rated as more effective and attention-grabbing than the text-only warnings (ADEs=0.07 and 0.27, respectively, both ps<0.001). Although all warning topics outperformed the control messages, warnings about addiction were rated as less effective and attention-grabbing than the other topics. A majority (60%) of participants selected "increases risk of" as the most discouraging causal variant and a plurality (47%) selected "SURGEON GENERAL WARNING" as the most discouraging marker word.

Conclusions

New alcohol warnings could discourage alcohol consumption, especially if warnings include icons.

Presence of Nicotine Warning Statement on US Electronic Nicotine Delivery Systems (ENDS) Advertisements 6 Months Before and After the August 10, 2018 Effective Date

INTRODUCTION

Effective in August 10, 2018, FDA requires advertisements for electronic nicotine delivery systems (ENDS) that meet the definition of a "covered tobacco product" to feature a standard nicotine warning statement. To date, limited data exist on the presence of warning statements in ENDS advertising.

METHODS

We acquired ENDS ads (n = 459) that first ran six months before (February 10, 2018-August 9, 2018) and after (August 10, 2018-February 9, 2019) the effective date. The sample included online, print, and outdoor static ads (ie, without video or animated graphics) (n = 166 before, n = 198 after), online and television video ads (n = 16 before, n = 49 after), and radio ads (n = 9 before, n = 21 after). We coded ads for the presence of the verbatim FDA warning. Ads with verbatim warnings were coded for required formatting and additional features.

RESULTS

Overall, 28% of static (n = 46/166), 62% of video (n = 10/16), and 67% of radio (n = 6/9) ads that ran before the effective date contained the verbatim warning versus 84% (n = 167/198, p < .001), 96% (n = 47/49, p = .002), and 86% (n = 18/21, p =.329) of ads that ran after, respectively. Following the effective date, nearly all static ads placed the warning as required at the top of the ad (76% [n = 35/46] before, 97% [n = 162/167] after, p < .001), and many video ads featured the warning statement for the entire ad duration (0% [n = 0/10] before, 60% [n = 28/47] after, p < .001). Half (n = 9/18) of radio warnings running after the effective date were read faster than the other promotional content.

CONCLUSIONS

The presence of the nicotine warning statement on paid promotional static, video, and radio ENDS ads in this sample increased after August 10, 2018, but a notable number still lacked the warning.

IMPLICATIONS

Results from this study provide initial insights into the extent to which required nicotine warning statements appear in ENDS ads in the study sample across traditional (eg, magazines, television, radio) and digital (eg, online/mobile ads) advertising mediums. Following the August 10, 2018, effective date, we observed a substantial increase in the presence of the required FDA warning statement on the ENDS ads in this sample. However, a notable number of ads in the study lacked the required warning and warnings did not always include the required formatting displays.

Electronic cigarettes versus nicotine-replacement therapy for smoking cessation: A systematic review and meta-analysis of randomized controlled trials

INTRODUCTION

Nicotine-replacement therapy (NRT) and electronic cigarettes (e-cigarettes) have been frequently used for smoking cessation. The aim of this review is to investigate the effectiveness and safety of e-cigarettes versus NRT for smoking cessation.

METHODS

We searched PubMed, EMBASE, the Cochrane Library from inception to 10 October 2021. We included randomized controlled trials (RCTs) comparing e-cigarettes versus NRT for smoking cessation. Two authors independently screened titles, abstracts and full texts for eligibility. Paired authors extracted data, assessed risk of bias, and used GRADE (Grades of Recommendation, Assessment, Development, and Evaluation) to rate the certainty of evidence.

RESULTS

The study included five RCTs with 1748 participants. The meta-analysis suggested the e-cigarettes versus NRT increased the ≥6 months continuous abstinence rate (RR=1.67; 95% CI: 1.21-2.28; 55 more per 1000 participants, low certainty), and 7-day point abstinence rate at ≥6 months follow-up (RR=1.43; 95% CI: 1.19-1.72; 84 more per 1000, low certainty). However, we found no evidence that e-cigarettes versus NRT increased 3-6 months continuous abstinence rate (RR=1.07; 95% CI: 0.73-1.57; 10 more per 1000, very low certainty) and <3 months continuous abstinence rate (RR=1.20; 95% CI: 0.90-1.60; 54 more per 1000, low certainty); similar results were found at <3 months follow-up (RR=1.19; 95% CI: 0.92-1.54; 55 more per 1000, very low certainty) and 3-6 months follow-up in 7-day point abstinence rate (RR=1.01; 95% CI: 0.70-1.44; 2 more per 1000, very low certainty). The adverse events were not significant between e-cigarettes and NRT other than throat irritation (RR=1.27; 95% CI: 1.13-1.42; 118 more per 1000, low certainty).

CONCLUSIONS

E-cigarettes appeared to be superior to NRT in ≥6 months continuous abstinence rate and 7-day point abstinence rate. At short-term duration, we found no evidence that e-cigarettes compared to NRT increased the <6 months continuous abstinence rate and 7-day point abstinence rate.

Impact of Vaping Prevention Advertisements on US Adolescents: A Randomized Clinical Trial

Importance

Understanding whether prevention advertisements reduce susceptibility to vaping is important owing to concerning levels of adolescent vaping.

Objective

To examine whether vaping prevention advertisements from the US Food and Drug Administration (FDA) national Real Cost campaign lead to lower susceptibility to vaping among adolescents.

Design, Setting, and Participants

For this 3-group randomized clinical trial with parallel assignment, participants were US adolescents aged 13 to 17 years who were susceptible to vaping or current e-cigarette users, recruited from online panels. Adolescents were randomized to 1 of 2 Real Cost vaping prevention trial groups (health harms- or addiction-themed advertisements) or to a control group (investigator-created neutral videos about vaping). Adolescents completed 4 weekly online surveys at visits 1 to 4 over a 3-week period. Data were analyzed from December 1, 2021, to August 25, 2022.

Interventions

Adolescents saw 3 randomly ordered 30-second video advertisements online at each of 3 weekly study visits (visits 1, 2, and 3).

Main Outcomes and Measures

The primary trial outcome was susceptibility to vaping. Surveys also assessed susceptibility to smoking cigarettes to examine any spillover effects of vaping prevention advertisements on smoking outcomes. Both susceptibility measures had 3 items and ranged from 1 (indicating not susceptible) to 4 (indicating highly susceptible). The primary analyses compared Real Cost groups (combined) with the control group, while exploratory analyses compared the Real Cost groups with each other.

Results

Participants were 1514 adolescents (1140 [75.3%] boys; mean [SD] age, 15.22 [1.18] years), including 504 randomized to the Real Cost health harms group, 506 randomized to the Real Cost addiction group, and 504 randomized to the control group. Adolescents in the Real Cost groups (combined) had lower susceptibility to vaping at visit 4 than those in the control group (b = -0.21; 95% CI, -0.32 to -0.10). The Real Cost groups did not differ from one another on susceptibility to vaping (visit 4: b = -0.05; 95% CI, -0.17 to 0.07). Adolescents in the Real Cost groups (combined) also had lower susceptibility to smoking cigarettes than those in the control group (b = -0.21; 95% CI, -0.32 to -0.10). For both vaping and smoking, Real Cost groups had less positive attitudes (vaping: b = -0.27; 95% CI, -0.40 to -0.14; smoking: b = -0.23; 95% CI, -0.39 to -0.08) compared with the control group.

Conclusions and Relevance

These findings suggest that vaping prevention advertisements from the FDA Real Cost campaign led to lower adolescent susceptibility to vaping and had beneficial spillover effects on cigarette smoking outcomes. Tobacco prevention campaigns can help reduce youth tobacco use.

Trial Registration

ClinicalTrials.gov Identifier: NCT04836455.

Risk and safety profile of electronic nicotine delivery systems (ENDS): an umbrella review to inform ENDS health communication strategies

OBJECTIVES

This umbrella review aims to summarise the evidence about electronic nicotine delivery systems' (ENDS) risk and safety health profile to inform ENDS health communication strategies.

DATA SOURCES AND STUDY SELECTION

Six databases were searched for systematic reviews presenting evidence on ENDS-related health effects. Ninety reviews divided into five categories were included: toxicity=20, health effects=40, role in smoking cessation=24, role in transition to combustible cigarettes (CCs)=13 and industry marketing claims=4.

DATA EXTRACTION

Findings were synthesised in narrative summaries. Meta-analyses were conducted by study type when appropriate. Quality assessment was conducted using the Measurement Tool to Assess Systematic Reviews. The Institute of Medicine's Levels of Evidence Framework was used to classify the evidence into high-level, moderate, limited-suggestive and limited-not-conclusive.

DATA SYNTHESIS

We found high-level evidence that ENDS exposes users to toxic substances; increases the risk of respiratory disease; leads to nicotine dependence; causes serious injuries due to explosion or poisoning; increases smoking cessation in clinical trials but not in observational studies; increases CC initiation; and exposure to ENDS marketing increases its use/intention to use. Evidence was moderate for ENDS association with mental health and substance use, limited-suggestive for cardiovascular, and limited-not-conclusive for cancer, ear, ocular and oral diseases, and pregnancy outcomes.

CONCLUSIONS

As evidence is accumulating, ENDS communication can focus on high-level evidence on ENDS association with toxicity, nicotine addiction, respiratory disease, ENDS-specific harm (explosion, poisoning) and anti-ENDS industry sentiment. Direct comparison between the harm of CCs and ENDS should be avoided.

PROSPERO REGISTRATION NUMBER

CRD42021241630.

Identifying Promising Themes for Adolescent Vaping Warnings: A National Experiment

INTRODUCTION

Adolescent vaping remains a problem in the United States, yet little is known about what health warning themes most discourage vaping among adolescents. We sought to identify the most compelling themes for vaping warnings for US adolescents.

METHODS

Participants were a national probability sample of 623 US adolescents aged 13-17 years, recruited in the summer of 2020. Adolescents were randomized to one of the five warning message themes about the potential health effects of vaping: 1. chemical harms, 2. lung harms, 3. Coronavirus Disease 2019 (COVID-19) harms, 4. nicotine addiction, or 5. control (messages about vape litter). The primary outcome was perceived message effectiveness (PME; 3-item scale). Secondary outcomes were negative affect (fear), attention, anticipated social interactions, and message novelty.

RESULTS

Adolescents rated the chemical, lung, and COVID-19 harms warning messages higher on PME than nicotine addiction and control (all p < .05), while nicotine addiction was rated higher than control (p < .05). The chemical, lung, and COVID-19 harms warning themes also elicited greater negative affect than nicotine addiction and control (all p < .05). For all other secondary outcomes, the COVID-19 harms warning message theme was rated higher than nicotine addiction and control (all p < .05).

CONCLUSION

Adolescents perceived warning message themes about lung, chemical and COVID-19 health effects of vaping as more effective than nicotine addiction. To discourage vaping, the FDA and others should communicate to youth about the health effects of vaping beyond nicotine addiction.

IMPLICATIONS

Adolescents rated warning message themes about the lung, chemical, and COVID-19 health effects of vaping as more effective than nicotine addiction, while nicotine addiction was rated as more effective than control themes about vaping litter. To discourage vaping among adolescents, health messaging should expand message themes to communicate about a broader set of health effects of vaping beyond nicotine addiction.

#Nicotineaddiction on TikTok: A quantitative content analysis of top-viewed posts

INTRODUCTION

TikTok, the video-sharing app popular among youth, is a source of user-generated content about nicotine addiction with the potential to endorse or deter nicotine use among young viewers. We systematically analyzed content and themes of TikTok posts tagged #nicotineaddiction.

METHODS

We conducted a quantitative content analysis of the visual and textual content of the 149 top-viewed English-language TikTok posts tagged #nicotineaddiction as of 1 March 2021. Posts were double-coded using a shared codebook, noting content creator characteristics, nicotine products featured, references to quitting, and overall themes of #nicotineaddiction expressed. We assessed the prevalence of post characteristics and themes overall and by apparent age of content creators (aged ≥21 years versus <21 years).

RESULTS

The 149 posts analyzed received a mean and median of 62433 and 15800 likes, respectively. E-cigarettes were referenced or featured in 75% of posts; 58% featured a specific nicotine product brand, most commonly Puff Bar (23% of total) and JUUL (19%). Overall, 22% of posts mentioned quitting nicotine. The top themes of #nicotineaddiction expressed were physical or psychological consequences (e.g. withdrawal symptoms, 46%), physical or psychological benefits (e.g. tasting good, feeling ‘buzzed’, 28%), and social benefits (e.g. bonding with fellow users, 28%). Compared to those aged ≥21 years, posts by content creators likely <21 years (26%) less commonly mentioned quitting (p<0.01), had fewer followers (p<0.01), were more commonly from Canada (p<0.01) and less commonly from the US (p<0.01), and more commonly featured JUUL (p<0.05).

CONCLUSIONS

While reaching a large and engaged audience, TikTok content creators suggest a range of benefits and consequences of nicotine addiction. Future research is warranted to examine this content’s potential to influence young people’s intentions to use or quit nicotine products.

Tests for confounding with cigarette smoking in the association of E-cigarette use with respiratory disorder: 2020 National-Sample Data

Associations of e-cigarette use with respiratory disorder have been demonstrated but it has been unclear whether these are confounded by current or previous cigarette smoking. We address this question through studying different time frames for e-cigarette use and respiratory disorders in 2020 BRFSS data (N = 214,945). E-cigarette use and combustible cigarette smoking were classified into four categories: Participant never used either (Nonuse); used e-cigarettes/cigarettes but not in the past 30 days (Former Use), used in past 30 days on some days (Nondaily Use), or used past 30 days on all days (Daily Use). Contrasts for e-cigarette status and cigarette status (with nonuse as reference group) were entered with covariates in logistic regression with asthma or COPD as criterion. Stratified analyses of e-cigarette use were also performed for smokers and nonsmokers. In the total sample, results showed independent positive associations with both lifetime and current asthma for Former, Nondaily, and Daily e-cigarette use (mostly p < .0001) and the three cigarette indices. Significant positive associations with COPD were found for the three e-cigarette indices (p < .0001) and all the cigarette indices. Stratified analyses showed significant associations of e-cigarette use with respiratory disorder among nonsmokers as well as among smokers. We conclude that independent associations for former e-cigarette use (controlling for current/former smoking) and significant associations of e-cigarette use with respiratory disorder among nonsmokers indicate these associations are not confounded with cigarette smoking and suggest reverse causation is implausible. Findings for former use are discussed with reference to possible mechanisms including sensitization effects.

Awareness of and reactions to health and environmental harms of red meat among parents in the United States

OBJECTIVE

Evidence of the health and environmental harms of red meat is growing, yet little is known about which harms may be most impactful to include in meat reduction messages. This study examined which harms consumers are most aware of and which most discourage them from wanting to eat red meat.

DESIGN

Within-subjects randomised experiment. Participants responded to questions about their awareness of, and perceived discouragement in response to, eight health and eight environmental harms of red meat presented in random order. Discouragement was assessed on a 1-to-5 Likert-type scale.

SETTING

Online survey.

PARTICIPANTS

544 US parents.

RESULTS

A minority of participants reported awareness that red meat contributes to health harms (ranging from 8 % awareness for prostate cancer to 28 % for heart disease) or environmental harms (ranging from 13 % for water shortages and deforestation to 22 % for climate change). Among specific harms, heart disease elicited the most discouragement (mean = 2·82 out of 5), followed by early death (mean = 2·79) and plants and animals going extinct (mean = 2·75), though most harms elicited similar discouragement (range of means, 2·60-2·82). In multivariable analyses, participants who were younger, identified as Black, identified as politically liberal, had higher general perceptions that red meat is bad for health and had higher usual red meat consumption reported being more discouraged from wanting to eat red meat in response to health and environmental harms (all P < 0·05).

CONCLUSIONS

Messages about a variety of health and environmental harms of red meat could inform consumers and motivate reductions in red meat consumption.

College Student E-Cigarette Users' Knowledge about E-Cigarettes: Ingredients, Health Risks, Device Modifications, and Information Sources

Although college students represent a growing demographic of e-cigarette users, it is unclear how knowledgeable they are about the product they use. The lack of such knowledge could result in unsafe practices and greater health risks. Therefore, the purpose of the current study was to examine college student e-cigarette users’ knowledge about e-cigarette ingredients and health risks, how often they modify their devices, and whether they utilize reputable sources when searching for information regarding e-cigarettes. The participants were 183 undergraduate e-cigarette users (M_age = 19.98, SD = 1.98; 71.6% female; 85.8% White). Most participants correctly recognized that e-cigarettes increase the risk of cardiovascular disease and lung disease, but fewer than half recognized the increased risk of seizures and depression. Only one-third to one-half of participants correctly identified the toxic compounds commonly found in e-cigarettes, and most indicated that they would consult Google or a friend with questions about e-cigarettes. College student e-cigarette users are well-informed about many health risks associated with e-cigarettes. However, they are relatively unaware of the harmful substances in e-cigarettes and are seeking information from less reliable sources. Targeted public health campaigns educating college students about e-cigarettes, including where to seek reliable information, are needed.

Multiple Tobacco Product Use Conceptual Framework: A 2021 Update on Evidence

INTRODUCTION

One-third of adults in the United States who use tobacco regularly use two or more types of tobacco products. As the use of e-cigarettes and other noncombusted tobacco products increases-making multiple tobacco product (MTP) use increasingly common-it is essential to evaluate the complex factors that affect product use.

AIMS AND METHODS

In this update to our 2019 conceptual framework, we review and evaluate recent literature and expand the model to include ways in which MTP use may be affected by market factors such as the introduction of new products and socioenvironmental factors like marketing and advertising.

RESULTS AND CONCLUSIONS

MTP use patterns are complex, dynamic, and multiply determined by factors at the level of individuals, products, situations or contexts, and marketplace. Substitution, or using one product with the intent of decreasing use of another, and complementarity, or using multiple products for different reasons or purposes, explain patterns in MTP use. Moreover, substitution and complementarity may inform our understanding of how market changes targeted at one product, for instance, new product standards, bans, product pricing, and taxation, affect consumption of other tobacco products. New data from natural experiments and novel laboratory-based techniques add additional data and expand the framework.

IMPLICATIONS

A substantial proportion of people who use tobacco use more than one product. This review synthesizes and evaluates recent evidence on the diverse factors that affect MTP use in addition to expanding our framework. Our review is accompanied by suggested research questions that can guide future study.

Associations Between Noticing Nicotine Vaping Product Health Warning Labels, Harm Perceptions, and Use among adult vapers, current and former smokers. Findings From the 2018 ITC Four Country Smoking and Vaping Survey

BACKGROUND

The number of countries mandating a nicotine addiction warning label ('warnings') on nicotine vaping products (NVPs) has been increasing. This study examined associations between noticing NVP warnings, perceptions of NVPs, and intentions to use NVPs.

METHODS

Cross-sectional analysis of 12,619 adult NVP users, cigarette smokers, concurrent users of both cigarettes and NVPs, and quitters who participated in the 2018 International Tobacco Control (ITC) Project Four Country Smoking and Vaping Survey (England, Australia, Canada, US). Logistic regression analyses examined associations between noticing warnings in the past 30 days and perceptions of nicotine harm, NVP harm relative to cigarettes, and NVP addictiveness relative to cigarettes. Associations were also explored between noticing warnings and intentions to use NVPs.

RESULTS

Noticing warnings was higher among NVP users (18.8%) than non-users (2.1%). Noticing warnings was associated with perceiving nicotine to pose little or no harm to health among NVP users, but there was no association among non-users. There was little evidence of an association between noticing warnings and perceptions of NVP harms relative to smoking among NVP users and non-users. Noticing warnings was associated with perceiving NVPs as less addictive than cigarettes among non-users but not NVP users. Among exclusive smokers, noticing warnings was associated with intending to start using NVPs. Among NVP users, there was little evidence of an association between noticing warnings and intentions to continue using/stopping NVPs.

CONCLUSIONS

Noticing NVP warnings was not associated with increased NVP and nicotine harm perceptions or decreased intentions to use NVPs among adult smokers and vapers.

Testing front-of-package warnings to discourage red meat consumption: a randomized experiment with US meat consumers

BACKGROUND

Reducing red meat is a strategy to improve public health and mitigate climate change in the United States and other high-income countries. Policies requiring warnings on the front of red meat packages are a promising intervention to shift consumers towards healthier and more sustainable food choices. We aimed to explore participants' reactions to health and environmental warning messages about red meat.

METHODS

Between June and July 2020, we recruited a national convenience sample of US red meat consumers (n = 1,235; mean age 44 years) for an online survey. Participants were randomly assigned to one of four label conditions: no-label control, health warning, environment warning, and combined health and environment warning (both warnings shown side-by-side). Participants viewed three types of burritos (red meat [steak], chicken, and vegetarian) and selected their preferred item (primary outcome), the item they perceived to be most damaging to health, and the item they perceived to be most damaging to the environment (secondary outcomes). Participants then viewed their assigned warning on a series of other red meat products (no-label control participants were randomly re-assigned to one of the warning conditions) and rated the warnings on perceived message effectiveness, believability, negative emotions, perceived risk, attention, and learning something new. Finally, participants reported their intentions to reduce red meat consumption.

RESULTS

There were no significant differences in selection of the steak burrito between label conditions or in selection of the item most damaging to the environment. Those exposed to the health warning were more likely to select the steak burrito as most damaging to health compared to those exposed to other label conditions (health 73 %, combined 64 %, environment 60 %, no-label control 63 %, p < 0.05). The combined and health warnings elicited higher perceived message effectiveness ratings than the environment warning (combined mean 2.91, health 2.84, environment 2.61, p < 0.05).

CONCLUSIONS

Warnings did not have a significant effect on item preference in the choice experiment. However, combined and health warnings performed better than the environment warning across a variety of warning label reaction measures. More research will be needed to understand whether warnings elicit behavioral change in real-world environments.

TRIAL REGISTRATION

Analyses and hypotheses were preregistered on https://aspredicted.org/ph7mb.pdf on 23 June 2020.

A qualitative examination of e-cigarette use among California young adults during the EVALI outbreak

The 2019 outbreak of E-cigarette, or Vaping, Product Use-Associated Lung Injury (EVALI) increased awareness of potential health risks associated with vaping among the general public. Little is known, however, about how unfolding information regarding EVALI affected knowledge, attitudes, and behaviors among e-cigarette users, particularly among young adults. This study describes attitudinal and behavioral responses to EVALI among young adult e-cigarette users. In October and November 2019, seven focus groups were held with college-going young adult tobacco users from two four-year public universities in California. Focus groups included questions regarding knowledge of and reaction to EVALI news, and how the news affected product use. Text from current e-cigarette users was extracted to develop individual phenomenological textural-structural descriptions of e-cigarette use for 38 individuals which were used to create a composite experience of e-cigarette use in light of EVALI. Experiences indicated that e-cigarette users were aware of information regarding EVALI and received information from numerous sources. Information was filtered for legitimacy of EVALI claims and causes of EVALI. Risk rationalizations were developed to assess potential harm of continued e-cigarette use and provided reasoning for behavioral responses to EVALI. The emerging harm associated with EVALI prompted e-cigarette users to engage in a cognitive process resulting in employment of a range of rationalities to justify continued use. These results suggest how environmental, cognitive, and behavioral factors may interact as young adults negotiate e-cigarette-related harms.

Waterpipe Tobacco Warnings: An Experimental Study among a Nationally Representative Sample of U.S. Young Adults

BACKGROUND

Waterpipe tobacco (WT) smoking by young adults remains high and misperceptions are common. Product warnings can increase knowledge of harms and reduce use. The goal of this study was to test warning statements, including the FDA-required nicotine warning (prior to implementation), on young adults' thinking about harms of and discouragement from WT smoking.

METHODS

We conducted a between-subjects experiment in a nationally representative telephone survey of 1,152 young adults ages 18-29. Participants were randomly assigned to hear one of five warning statements and reported how much, on a 4-point scale, the warning made them think about the harms and discouraged them from WT smoking.

RESULTS

The sample was 36.8% female, 57.8% white, 20.2% Black, 24.1% Hispanic, with a mean age of 23.2 (SE=0.25). Under half (43.5%) had ever smoked WT. There were significant differences among the statements on both thinking about harms (p<.0001) and discouragement (p<.0001). The FDA-required 'nicotine' warning led to the lowest thinking about harms (M=2.85, SE=0.08) and was the least discouraging (M=2.86, SE=0.08), while the '100 cigarettes' warning resulted in the greatest thinking about harms (M=3.62, SE=0.05) and was the most discouraging (M=3.56, SE=0.06).

CONCLUSION

The nicotine warning resulted in the lowest levels of thinking about harms and discouragement from WT smoking, suggesting limited impact. However, a warning focused on comparing smoke inhalation from WT smoking to cigarettes seems promising. Warnings should cover a broad range of WT health effects, and possibly comparisons to cigarettes. Findings also have implications for the content of international waterpipe warnings.

IMPLICATIONS

This study indicates that the nicotine warning is the least effective at making young adults think about the harms of and discouraging waterpipe tobacco smoking. The FDA and other countries should consider requiring warnings to cover a broader range of health harms, misperceptions, and possibly comparisons to cigarettes.

Dual Use of Electronic Cigarettes and Traditional Cigarettes Among Adults: Psychosocial Correlates and Associated Respiratory Symptoms

BACKGROUND

Prolonged use of both electronic cigarettes (e-cigarettes) and traditional cigarettes can increase breathing difficulties and other adverse health effects. Research is needed to provide a deeper understanding of predictors of dual use, particularly given rapid changes in the e-cigarette market and related public health communications and policy.

METHODS

The sample consists of subjects in the National Longitudinal Study of Adolescent to Adult Health Wave 5 (cross-sectional) subsample (N = 3,800) from 2016 to 2018. Participants were 31-42 y old. Multinomial logistic regression analyses were used to determine predictors of mutually exclusive categories: e-cigarette use only, cigarette use only, and concurrent e-cigarette and traditional cigarette use (compared to no use). Predictors included sex, age, poverty status, race/ethnicity, self-reported diagnosed depression, self-reported diagnosed anxiety, and previous experience of child maltreatment.

RESULTS

Among the total sample (N = 3,800), 2% reported e-cigarette use only, 20% reported traditional cigarette use only, and 3% reported dual use of both e-cigarettes and traditional cigarettes. Among subjects who reported any e-cigarette or traditional cigarette use (n = 957), 12% reported dual use. In the final adjusted multivariable multinomial model, dual use was associated with living at or below the poverty line (odds ratio 2.49 [95% CI 1.19-5.70]), self-reported diagnosed depression (odds ratio 1.99 [95% CI 1.10-3.61]), and a history of child maltreatment (odds ratio 1.80 [95% CI 1.10-2.95]). Additionally, Hispanic-American individuals were more likely to report dual use compared to cigarette-only use.

CONCLUSIONS

Prolonged dual use of both e-cigarettes and traditional cigarettes is a considerable public health problem. While our study identified a low percentage of dual usage among U.S. adults, dual use was disproportionately prevalent among those with depression, history of child maltreatment, living at or below the poverty line, and among Hispanic-American individuals. Culturally appropriate interventions and increasing access to cessation programs may help mitigate health disparities pertaining to dual use.

Awareness of and reactions to the health harms of sugary drinks: An online study of U.S. parents

Evidence about the health problems associated with sugary drink consumption is well-established. However, little is known about which sugary drink health harms are most effective at changing consumers' behavior. We aimed to identify which harms people were aware of and most discouraged them from wanting to buy sugary drinks. Participants were a national convenience sample of diverse parents (n = 1,058), oversampled for Latino parents (48%). Participants rated a list of sugary drink-related health harms occurring in children (7 harms) and in adults (15 harms). Outcomes were awareness of each harm and how much each harm discouraged parents from wanting to purchase sugary drinks. Most participants were aware that sugary drinks contribute to tooth decay in children (75%) and weight gain in both children (73%) and adults (69%). Few participants were aware that sugary drinks contribute to adult infertility (16%), arthritis (18%), and gout (18%). All health harms were rated highly in terms of discouraging parents from wanting to buy sugary drinks (range: 3.59-4.11 on a 1-5 scale), with obesity, pre-diabetes, and tooth decay eliciting the highest discouragement ratings. Harm-induced discouragement was higher for participants who were aware of more health harms (B = 0.05, p < 0.0001), identified as female (B = 0.15 compared to male, p = 0.02), or had an annual household income of $50,000 or more (B = 0.16 compared to less than $50,000, p = 0.03). These findings suggest health messages focused on a variety of health harms could raise awareness and discourage sugary drink purchases.

Adolescent perceptions of E-cigarette use and vaping behavior before and after the EVALI outbreak

This study sought to determine whether adolescents' e-cigarette risk perceptions, perceived benefits, and positive expectations, and vaping behavior changed after the electronic-cigarette or vaping product use-associated lung injury (EVALI) outbreak. This longitudinal survey studied 1539 high school students in suburban Philadelphia, PA in 11th and 12th grade, before and after the outbreak of EVALI cases in 2019. Adolescents who reported current nicotine vaping at baseline (versus those who did not) had a greater increase in risk perceptions (B = -0.31, p = 0.04) and a greater decrease in positive expectations (B = -1.30, p = 0.003) at follow-up. Adolescents who reported current marijuana vaping at baseline (versus those who did not) had greater perceived benefits (B = 2.19, p < 0.001), lower risk perceptions (B = 0.39, p < 0.001), and greater positive expectations of e-cigarette use (B = 1.43, p < 0.001) across time. Odds of current nicotine vaping at follow-up increased (OR = 1.61, 95% CI = 1.08, 2.41) for adolescents who maintained lower risk perceptions. Odds of current nicotine vaping at follow-up decreased (OR = 0.33, 95% CI = 0.21, 0.50) for adolescents whose positive expectations of e-cigarette use decreased. The odds of current marijuana vaping at follow-up decreased (OR = 0.64, 95% CI = 0.42, 0.98) for adolescents whose positive expectations of e-cigarette use decreased. Perceptions of the risks of e-cigarette use increased and positive expectations of e-cigarette use decreased after the EVALI outbreak. Adolescent risk perceptions and positive expectations of e-cigarette use are two potential targets to impact vaping behavior. Emphasizing the risks of e-cigarette use while decreasing positive expectations of use have the potential to reduce vaping behavior, and perhaps subsequent EVALI cases.

Identifying message content to reduce vaping: Results from online message testing trials in young adult tobacco users

INTRODUCTION

Young adults' e-cigarette use is associated with perceptions that e-cigarettes are less harmful or addictive than cigarettes, socially acceptable, and appealing. This study developed and tested vaping educational messages addressing these factors: 1) Harm Perceptions, 2) Addictiveness, 3) Social Use, and 4) Flavors.

METHODS

Two message trials were conducted in U.S. Amazon Mechanical Turk workers aged 18-24 using a 2 (content: addiction, harm) × 3 (theme: alone, + flavors, + social) design with multiple messages in each of the six categories. Participants were assigned to view a random subset of messages and report on likeability and perceived message effectiveness (PME). Phase 1 (n = 200) tested 33 messages and 32 images. Phase 2 (n = 769) tested combinations of Phase 1's 24 most effective messages with 6 images rated most likeable or effective. Linear mixed effects models assessed the effect of content, theme, image, and their interactions on message response.

RESULTS

In both trials, most participants were past 30-day tobacco users. Harm content messages produced higher PME ratings than addiction content messages, and flavor theme messages were correlated with higher likeability scores than "content alone" theme messages. In Phase 2, flavor and social message themes decreased the PME of harm messages. There was no effect of images on either outcome controlling for the independent or interaction effects of content, theme, and image.

CONCLUSIONS

Messages conveying the harms of vaping may be best for reducing vaping in young adult tobacco users; flavor and social themes may diminish their effectiveness.

Analysis of on-pack messages for e-liquids: a discrete choice study

BACKGROUND

Policymakers wishing to encourage smokers unable to quit to switch to using electronic nicotine delivery systems (ENDS) also need to consider how to deter ENDS use among non-smokers. We examined whether reduced-risk messages could increase ENDS' appeal among smokers and if increased-risk messages could decrease appeal among susceptible non-smokers, occasional and former smokers.

METHODOLOGY

An online discrete choice experiment tested three attributes: information message, nicotine content (0 mg or 3 mg) and flavour (tobacco, menthol or fruit). The sample comprised 352 current smokers, 118 occasional and former smokers, and 216 ENDS-susceptible never smokers. Smokers viewed reduced-risk messages that encouraged switching to ENDS, while other groups viewed increased-risk messages that discouraged ENDS use. All groups saw a typical addiction warning. We analysed the data by estimating multinomial logit regression and adjusted latent class analysis models.

RESULTS

Relative to no message, reduced risk-messages increased the appeal of ENDS uptake among one class of smokers (33.5%) but decreased appeal among other smokers. However, among all smokers, reduced-risk messages increased preference more than a dissuasive addiction warning. By contrast, among occasional or former smokers, and susceptible non-smokers, all information messages discouraging ENDS use, including an addiction warning, decreased preference relative to no message.

CONCLUSIONS

On-pack relative-risk messages about ENDS could make transition more attractive to smokers while increased-risk messages could deter ENDS uptake among susceptible non-smokers, occasional and former smokers. Communicating diverse messages via discrete channels could recognise heterogeneity among and between smokers and non-smokers.

Adolescents and Young Adults Who Vape or Are Susceptible to Vaping: Characteristics, Product Preferences, and Beliefs

This study examined differences among current vapers, those susceptible to vaping, and those non-susceptible to vaping among adolescents and young adults (AYAs) in the U.S. We sought to understand vaping-related characteristics, preferences, and beliefs across these populations to inform prevention efforts. Methods: Participants were N=543 adolescents and N=557 young adults recruited in mid-2019 in the U.S. In two separate cross-sectional surveys, we assessed vaping preferences, tobacco product use, and both health harm and addiction risk beliefs about vaping. We ran separate multivariate logistic regressions to assess differences in risk beliefs across the three distinct e-cigarette groups among AYAs. Results: A majority of AYAs were either current vapers (adolescents: 32%, young adults: 36%) or susceptible to vaping (adolescents: 34%, young adults: 24%). In both samples, pod-based devices were the most common device type used, and fruit and mint/menthol were the most commonly used flavors. In multivariate analyses, adolescent (p<.05) and young adult (p<.05) current vapers both had lower risk beliefs about the health harms of vaping compared to those susceptible to vaping. Susceptible adolescents also had lower health harm risk beliefs compared to those who were non-susceptible (p<.05). Addiction risk beliefs seldom predicted use or susceptibility in multivariate analyses, with only susceptible young adults having lower addiction beliefs than those non-susceptible (p<.05). Conclusion: Results from this study highlight the role of health harm risk beliefs among AYA vapers and those susceptible to vaping. Prevention efforts should examine the most potent ways to communicate vaping health harms to discourage AYA vaping.

Reactions to messages about smoking, vaping and COVID-19: two national experiments

Introduction

The pace and scale of the COVID-19 pandemic, coupled with ongoing efforts by health agencies to communicate harms, have created a pressing need for data to inform messaging about smoking, vaping, and COVID-19. We examined reactions to COVID-19 and traditional health harms messages discouraging smoking and vaping.

Methods

Participants were a national convenience sample of 810 US adults recruited online in May 2020. All participated in a smoking message experiment and a vaping message experiment, presented in a random order. In each experiment, participants viewed one message formatted as a Twitter post. The experiments adopted a 3 (traditional health harms of smoking or vaping: three harms, one harm, absent) × 2 (COVID-19 harms: one harm, absent) between-subjects design. Outcomes included perceived message effectiveness (primary) and constructs from the Tobacco Warnings Model (secondary: attention, negative affect, cognitive elaboration, social interactions).

Results

Smoking messages with traditional or COVID-19 harms elicited higher perceived effectiveness for discouraging smoking than control messages without these harms (all p <0.001). However, including both traditional and COVID-19 harms in smoking messages had no benefit beyond including either alone. Smoking messages affected Tobacco Warnings Model constructs and did not elicit more reactance than control messages. Smoking messages also elicited higher perceived effectiveness for discouraging vaping. Including traditional harms in messages about vaping elicited higher perceived effectiveness for discouraging vaping (p <0.05), but including COVID-19 harms did not.

Conclusions

Messages linking smoking with COVID-19 may hold promise for discouraging smoking and may have the added benefit of also discouraging vaping.

An experimental study of messages communicating potential harms of electronic cigarettes

There has been an upsurge of e-cigarette use in the United States in recent years. While e-cigarettes may contain lower levels of toxic chemicals than combusted cigarettes, they still pose serious health hazards, including increased risk for heart and respiratory disease. Despite these risks, public awareness of the health harms of e-cigarettes remains low. Thus, it is important to educate the public about the potential harms of e-cigarettes. This study took themes commonly found in antismoking messages and used them to develop messages about harms of e-cigarettes. A national sample of 2801 current smokers and nonsmokers (aged 18+ years) were randomized to view one of four e-cigarette messages (harmful effect of chemicals, uncertainty about ingredients, distrust of big tobacco, or cost of vaping) or a control message (bottled water ad). Participants' reactions to the messages and behavioral intentions were assessed immediately following the exposure. MANOVA examined effects of the messages on blocks of the outcome variables and univariate analyses estimated adjusted means for each experimental condition for each outcome. The message about harmful chemicals was perceived as the most informative and effective and elicited the highest levels of negative emotions (Ps<0.05). However, on measures of actual effectiveness, the other messages performed equally well. Specifically, messages with different themes (harmful chemicals, uncertainty about ingredients, anti-industry, or financial cost) increased perceived risk of e-cigarettes, support for e-cigarette control, and lowered self-exempting beliefs and intentions to use e-cigarettes (Ps<0.05). Themes commonly used in anti-smoking messages may be effective in educating the public about the potential harm of e-cigarettes. The observed differential effects of the messages suggest the need to use multiple themes in a public education campaign about e-cigarettes.

Changes in substance use among young adults during a respiratory disease pandemic

Background:

News articles, commentaries, and opinion articles have suggested that ongoing social distancing measures coupled with economic challenges during COVID-19 may worsen stress, affective state, and substance use across the globe. We sought to advance our understanding of the differences between individuals who change their substance use patterns during a public health crisis and those who do not.

Methods:

Cross-sectional survey of young adults (18–25 years of age) assessing respondent characteristics and vaping, tobacco, alcohol, and/or marijuana use. We calculated prevalence estimates, prevalence changes, and prevalence ratios with associated 95% confidence intervals and looked for differences with the chi-square test.

Results:

Of the total sample, 53.2% (n = 542/1018) young adults reported vaping or using tobacco, alcohol, and/or marijuana. Among the 542 respondents reporting use, 34.3% reported a change in their use patterns. Among respondents reporting changes in substance use patterns during the pandemic (n = 186), 68.8% reported an increase in alcohol use, 44.0% reported a decrease in vaping product use, and 47.3% reported a decrease in tobacco product use due to COVID-19. Substance use changed significantly for respondents with increasing degree of loneliness (continuous loneliness score: prevalence ratio = 1.12, 95% confidence interval = 1.01–1.25), anxiety (prevalence ratio = 1.45, 95% confidence interval = 1.14–1.85), and depression (prevalence ratio = 1.44, 95% confidence interval = 1.13–1.82).

Conclusion:

Self-reported substance use among young adults was observed to change during a pandemic, and the degree of loneliness appears to impact these changes. Innovative strategies are needed to address loneliness, anxiety, depression, and substance use during global health crises that impact social contact.

Assessment of knowledge of use of electronic cigarette and its harmful effects among young adults

Background

The practice of young adults smoking e-cigarette may have been adopted as a way of smoking cessation or just to follow a trend. Most people still remain unaware of the detrimental effects of e-cigarette. This study was carried out to assess the prevalence of the habit of smoking e-cigarette and the awareness of its harmful effects among adults aged 18–23 years.

Methods

A questionnaire adopted from a study conducted in Italy was used in the study following due permission. After taking their consent, participants were requested to fill the survey irrespective of their smoking status.

Results

In total the study comprised 710 participants aged 20.7 ± 1.7 years (females = 412 and males = 298) from six countries. Most respondents were from India followed by the USA and then the UK. The most common mode of information for the participants on the existence of e-cigarette was from the family members, friends followed by Internet search engines and TV/newspaper advertisements. Among the participants, e-cigarette had a prevalence of 5.63%. Among these, 26 participants were using e-cigarette for less than 1 year and 2 participants for more than 5 years. E-cigarette smokers also experienced sore throat, cough, headache, dizziness and sleeplessness.

Conclusion

Majority of the young population was unaware about the use and harmful effects of e-cigarette.

Increasing Prevalence of Electronic Cigarette Use among Medical Students. Repeated Cross-Sectional Multicenter Surveys in Germany and Hungary, 2016-2018

Use of electronic cigarettes (e-cigarettes) is gaining popularity among young adults. Medical students' nicotine use behavior is of particular interest because of their impending role in health promotion. Objectives: Aim of our study is to assess changes that occurred between 2016 and 2018 in the prevalence of e-cigarette use among medical students and to explore associations between e-cigarette use, demographic characteristics, and cigarette smoking. Self-administered questionnaire surveys were used to obtain cross-sectional data of medical students in Budapest and Pécs, Hungary, and Dresden, Germany. Results: Sample sizes for 2016 and 2018 were 2297 and 1514, respectively. In the whole sample, past-30-day use of e-cigarettes increased from 4.5% to 8.0% (p < 0.001). The increase in e-cigarette use was significant in both genders (from 3.6% to 5.6% among females, p = 0.028, and from 5.9 to 11.4% among males, p < 0.001). Prevalence of e-cigarette use was higher among Hungarian students than among German students (2.2% versus 5.7% in 2016, and 4.1% versus 10.5% in 2018, p < 0.05 for both years). There was no significant difference in e-cigarette use among different academic years. The ratio of e-cigarette users increased significantly among current cigarette smokers but not among nonsmokers. We could not detect a decrease in cigarette smoking. Conclusions: Prevalence of e-cigarette use increased significantly among medical students without a reduction in cigarette smoking. Medical schools should add the topic of e-cigarettes to their curricula and need to develop cessation programs to help their students quit both cigarettes and e-cigarettes.