Knowledge and beliefs about electronic cigarettes among quitline cessation staff

Vaping among Norwegians who smoke or formerly smoked: reasons, patterns of use, and smoking cessation activity

BACKGROUND

The majority of Norwegians who use e-cigarettes are adults who have smoked. Little is known about vaping reasons and -patterns in this group. The aim of this paper was to study vaping prevalence, patterns, and motivations among adults who smoke. Furthermore, to investigate smoking intensity and smoking cessation behaviour differences between those who vape and those who do not.

METHODS

This study was based on two separate Norwegian samples: People who had ever smoked, from 2017 (N = 2099), and people who currently smoked and recent quitters, from 2018/2019 (N = 1336). Measures of vape frequencies, vape motives, and smoking cessation behaviours were utilised in descriptive analyses of relationships between vaping and smoking behaviour.

RESULTS

Less than 1 in 10 in the ever-smoked group, 1 in 5 of the currently smoked or recently quit group, were currently vaping. Ever trial rates for vaping were much higher at 1 in 3 in the ever-smoked group, and 1 in 2 in the currently smoked or recently quit group. Dual use with combustible cigarettes was common, but people who smoked tended to use e-cigarettes less frequently while those who formerly smoked tended to use them more frequently. Both quitting attempts and smoking intensity reduction were positively associated with vaping, and the most common reasons for e-cigarette use were reported to be desires to reduce harm, to stop smoking, or to reduce smoking intensity.

CONCLUSION

The results indicate that Norwegians who smoke tend to see e-cigarettes as a tool to reduce or completely stop smoking. The predominance of use-motivations related to reducing harm points at the importance of conveying correct information about relative harmfulness of tobacco- and nicotine products.

Providers' Non-Cigarette Tobacco Use Intervention Practices in Relation to Beliefs about Patients, Prioritization of and Skills for Intervention, and Referral Knowledge in Texas Healthcare Centers Providing Care to Persons with Behavioral Health Needs

Rates of non-cigarette (colloquially, other) tobacco use is elevated among adults with behavioral health conditions. Little is known about whether behavioral health providers are using brief interventions, including the evidence-based 5As (Ask, Advise, Assess, Assist, and Arrange) for other tobacco use, or what provider factors may be associated with use of these interventions. The current study redressed this gap. Overall, 86 providers in Texas (9 Federally Qualified Health Centers, 16 Local Mental Health Authorities (LMHAs) that provide a broad range of mental and behavioral health services, 6 substance use treatment programs in LMHAs, and 55 stand-alone substance use treatment programs) took a survey assessing their beliefs regarding (1) patients' concerns about other tobacco use; (2) their desire to quit; (3) importance of intervening on other tobacco use with cessation counseling; (4) perceived skills to intervene; (5) knowledge of referral options for treatment. Logistic regression analyses were conducted to determine the association between each factor and use of the 5As. Results showed that 70.9% of providers asked patients about other tobacco use status, 65.1% advised them to quit, 59.3% assessed quit interest, 54.7% assisted with a quit attempt, and 31.4% arranged a follow-up. Providers who believed patients were concerned about other tobacco use, recognized the importance of offering other tobacco use cessation counseling, believed they had the necessary skills to treat other tobacco use, and possessed knowledge of referral options, respectively, were more likely to deliver the 5As (ps < 0.05). Results add to a limited literature on provider intervention practices for other tobacco use in settings where behavioral health care is provided, highlighting the significance of provider beliefs, perceived skills, and referral knowledge to care delivery. Findings reveal opportunities to increase delivery of the 5As for other tobacco use to behavioral health patients and suggest provider factors that could be targeted to build this capacity.

Knowledge and Attitudes Among Medical Students Toward the Clinical Usage of e-Cigarettes: A Cross-Sectional Study in a University Hospital in Saudi Arabia

Background

To assess knowledge and attitudes about e-smoking among undergraduate medical students, specifically focused on favorable view of therapeutic e-cigarette use for smoking cessation or harm reduction.

Methods

This cross-sectional study included medical students at King Abdulaziz University, Saudi Arabia. A six-item subscale was used to explore knowledge and attitudes about the therapeutic use of e-cigarettes, measuring participants' likelihood of favoring such use. A four-item questionnaire measured confidence and importance of being educated about smoking and e-smoking, in addition to sources of knowledge about e-cigarettes.

Results

A total of 399 students participated. Smoking history included current smokers (19.8%) and ex-smokers (6.5%), while e-cigarettes were tried by 36.6% and are currently used by 11.5%. A minority (13.5%) believed that e-cigarettes are FDA-approved for smoking cessation, while approximately one-third believed e-smoking lowers cancer risks (31.1%) and could help with smoking cessation (31.1%). Further, 35.9% agreed or strongly agreed that e-cigarettes are better for patients than tobacco products, and 17.5% were likely to recommend e-smoking to their patients for smoking cessation. Reliability of the six-item scale showed Cronbach's alpha = 0.676, which was enhanced to 0.746 after deletion of one item about addictiveness. Using the corrected five-item scale, 23.6% of the participants would favor therapeutic use of e-cigarettes.

Conclusion

We observed several misconceptions about addictiveness and inadequate awareness about e-cigarettes' harmful effects, leading to non-scientific opinions about its therapeutic use for harm reduction or in smoking cessation. Academic programs around this topic should be updated in accordance with majority expert recommendations.

Electronic cigarettes as a smoking cessation aid for patients with cancer: beliefs and behaviours of clinicians in the UK

OBJECTIVES

To explore UK clinicians' beliefs and behaviours around recommending e-cigarettes as a smoking cessation aid for patients with cancer.

DESIGN

Cross-sectional online survey.

SETTING

England, Wales, Scotland and Northern Ireland.

PARTICIPANTS

Clinicians involved in the care of patients with cancer.

PRIMARY AND SECONDARY OUTCOMES

Behavioural Change Wheel capability, opportunity and motivation to perform a behaviour, knowledge, beliefs, current practice around e-cigarettes and other smoking cessation practices.

METHOD

Clinicians (n=506) completed an online survey to assess beliefs and behaviours around e-cigarettes and other smoking cessation practices for patients with cancer. Behavioural factors associated with recommending e-cigarettes in practice were assessed.

RESULTS

29% of clinicians would not recommend e-cigarettes to patients with cancer who continue to smoke. Factors associated with recommendation include smoking cessation knowledge (OR 1.56, 95% CI 1.01 to 2.44) and e-cigarette knowledge (OR 1.64, 95% CI 1.06 to 2.55), engagement with patients regarding smoking cessation (OR 2.12, 95% CI 1.12 to 4.03), belief in the effectiveness of e-cigarettes (OR 2.36 95% CI 1.61 to 3.47) and belief in sufficient evidence on e-cigarettes (OR 2.08 95% CI 1.10 to 4.00) and how comfortable they felt discussing e-cigarettes with patients (OR 1.57 95% CI 1.04 to 2.36).

CONCLUSION

Many clinicians providing cancer care to patients who smoke do not recommend e-cigarettes as a smoking cessation aid and were unaware of national guidance supporting recommendation of e-cigarettes as a smoking cessation aid.

Beliefs and Self-reported Practices of Health Care Professionals Regarding Electronic Nicotine Delivery Systems: A Mixed-Methods Systematic Review and Synthesis

AIMS

This review explores the (1) beliefs and attitudes of health care professionals (HCPs) toward electronic nicotine delivery systems (ENDS) including use as a smoking cessation aid and/or harm reduction, safety and regulation, and (2) the extent and content of patient-HCP communication about ENDS.

METHODS

PubMed, Embase, CINAHL, and PsycINFO were searched to identify articles published since 2003. The Mixed Methods Appraisal Tool and Strengthening the Reporting of Observational Studies in Epidemiology checklists were used to assess the quality of studies. Thematic synthesis was used to analyze qualitative data.

RESULTS

A total of 45 articles (32 quantitative, 12 qualitative, and 1 mixed) were included. There was wide variation regarding beliefs about the efficacy of ENDS as a cessation aid. Although the majority of HCPs believes that ENDS are safer than combustible cigarettes, they also have concern about the short and long-term safety of ENDS, uptake by adolescents, and the potential for ENDS to act as a "gateway" to smoking cigarettes. Beliefs about ENDS are influenced by media stories and experiences provided by patients. Although most HCPs do not proactively recommend ENDS, they are more likely to support ENDS use among patients with smoking related comorbidities, heavy smokers with previous unsuccessful quit attempts, or patients who express interest in trying them.

CONCLUSIONS

Overall, HCPs hold diverse views about the efficacy of ENDS and expressed wariness over their potential health effects. HCP endorsement of ENDS use seems to depend largely on patient health status, the presence of other competing risk factors and patient preferences.

IMPLICATION

Although evidence on safety and efficacy of ENDS is emerging, HCPs should be honest with their clients, stating that the long-term safety is not yet established but what is known is that they appear to be a lower risk alternative to cigarettes. Our review highlights a need for further training and support for HCPs regarding ENDS use, which would enable them to guide their clients in making evidence-based decisions.

Electronic cigarette use and tobacco cessation in a state-based quitline

Introduction

Evidence is mixed on e-cigarette's effectiveness as a tobacco cessation aid. Research suggests that e-cigarette users face greater barriers to quitting tobacco.

Aim

To examine the association between e-cigarette use and tobacco cessation outcomes among quitline callers.

Methods

We examined 2,204 callers who enrolled and completed 7-month follow-up surveys between April 2014 and January 2017. We examined the association between any e-cigarette use and tobacco cessation. We also evaluated these relationships by e-cigarette use patterns between enrollment and 7-month follow-up: sustained, adopted, discontinued, and non-use. We used multivariable logistic regression to control for caller characteristics, tobacco history, and program utilization.

Results

Overall, 18% of callers reported using e-cigarettes at enrollment, follow-up, or both. Compared to non-users, e-cigarette users were more likely to be younger, non-Hispanic, and report a mental health condition. The adjusted odds of tobacco cessation were not statistically different for callers who used e-cigarettes compared to those who did not (adjusted odds ratios = 1.02, 95% confidence interval 0.79–1.32). Results were similar when examining cessation by patterns of e-cigarette use.

Conclusions

E-cigarette use was not associated with tobacco cessation. This suggests that e-cigarette use may neither facilitate nor deter tobacco cessation among quitline callers. Future research should continue exploring how e-cigarette use affects quitting.

"Cloud chasers" and "substitutes": e-cigarettes, vaping subcultures and vaper identities

The use of e-cigarettes is increasing, a practice denoted as vaping. We explore user motives, self-identity as vapers and involvement in vaping subcultures, drawing on sociological theory of stigma, subcultures and symbolic boundaries. Based on analyses of semi-structured interviews with 30 Norwegian vapers, we find that there is a vaping subculture in Norway. We identify two dominant vaper identities. The first is labelled cloud chasers. These were dedicated vapers who identified with symbols and values in the subculture. Many were politically engaged in improving vaping regulation regimes and felt a sense of belonging to a vaping community. The second group is labelled substitutes. These were former daily smokers who used e-cigarettes for smoking cessation in a more pragmatic and defensive manner, to avoid health risks, to escape the stigma of smoking and to manage nicotine addiction. In this group, self-identity as a vaper was generally lacking. Vaping was often symbolically linked to the stigmatised smoker identity they wanted to escape, and was restricted to private contexts. The perceived symbolic meaning of e-cigarettes varies: for some, they are a symbol of pleasure and community. For others, they connote the stigmatised status of the addicted smoker seeking an alternative to cigarettes.

Electronic nicotine delivery systems (e-cigarettes) as a smoking cessation aid: A survey among pharmacy staff in Queensland, Australia

OBJECTIVES

This study examined views of pharmacy staff regarding the safety of e-cigarettes compared to nicotine replacement therapies (NRTs) and conventional cigarettes, as well as views on their regulation in Australia.

METHODS

We conducted a cross-sectional survey among pharmacy staff (64 pharmacists and 76 pharmacy assistants) from the greater Brisbane region, Queensland, Australia. The self-administered questionnaire included closed- and open-ended questions that explores pharmacy staff perception on harms of e-cigarettes versus NRT and traditional cigarettes, knowledge of current e-cigarette regulations, views on how they should be regulated and information needs regarding e-cigarettes. Pearson's chi-square test was employed for computing differences between variables. A content analysis of responses to open-ended questions was also performed.

RESULTS

Over 90% of pharmacy staff regarded e-cigarettes without nicotine and NRTs as less harmful than regular tobacco cigarettes. This reduced to 72% for e-cigarettes containing nicotine, with 24% of respondents believing they are equally as harmful as conventional cigarettes. Moreover, few respondents were confident about the short and long term safety of e-cigarettes containing nicotine (36% and 15% respectively) whereas pharmacy staff were more comfortable with the safety of NRTs for short (88%) and long term (35%) use. The majority of respondents believed that e-cigarettes with nicotine should be regulated as a medicine, either requiring a prescription (24%) or sold only by pharmacies (22%), though many believed that they should be regulated in the same way as regular tobacco cigarettes (27%). Some pharmacy staff (39%) reported having been asked about e-cigarettes by customers and 75% believed that their customers would be interested in using e-cigarettes as a smoking cessation aid.

CONCLUSIONS

There is a need to provide evidence-based and customised education for pharmacists regarding e-cigarettes to help them guide their clients.

Attitudes to E-Cigarettes and Cessation Support for Pregnant Women from English Stop Smoking Services: A Mixed Methods Study

Smoking in pregnancy remains a public health problem. In the UK e-cigarettes are the most popular aid to quitting smoking outside of pregnancy, but we don't know the extent of e-cigarette use in pregnancy or how English Stop Smoking Services (SSS) respond to pregnant women who vape. In 2015 we surveyed SSS managers about cessation support for pregnant women and responses to clients who vaped. Subsequently we interviewed a sub-sample of managers to seek explanations for the SSS' position on e-cigarettes; interviews were thematically analysed. Survey response rate was 67.8% (72/106); overall managers reported 2.2% (range 1.4⁻4.3%) of pregnant clients were using e-cigarettes. Most SSS reported supporting pregnant women who already vaped, but would not recommend e-cigarette use; for women that were still smoking and not using e-cigarettes, 8.3% of SSS were likely/very likely to advise using e-cigarettes, with 56.9% of SSS unlikely/very unlikely to advise using them. Fifteen respondents were interviewed; interviewees were generally positive about the potential of e-cigarettes for cessation in pregnancy although concerns about perceived lack of evidence for safety were expressed and most wanted research on this. Clear guidance on e-cigarette use informed by pregnancy specific research will assist SSS to provide consistent evidence-based support.

Developing E-cigarette friendly smoking cessation services in England: staff perspectives

BACKGROUND

Public health leadership in England has taken a distinctive international stance by identifying the potential public health benefit of e-cigarettes for smoking cessation. This includes the development of a ground-breaking set of national guidelines for developing e-cigarette friendly stop smoking services. However, little is known about the views of staff engaged within these services and whether or how such services are becoming e-cigarette friendly. This study aimed to investigate the uptake and usage of e-cigarette guidance, from the perspective of those enacting tobacco cessation interventions 'on the ground'.

METHODS

Qualitative semi-structured interviews were conducted with 25 cessation service staff, including advisors (n = 15), managers (n = 5) and commissioners (n = 5) from eight different services in the South-West of England, UK. A thematic analysis of the transcripts was conducted using NVivo software.

RESULTS

Although some stop smoking services labelled themselves e-cigarette friendly, there was no consensus over what this should entail. For some, this meant active engagement, such as working with local vape shops, and in the case of one service, offering e-cigarettes through a voucher scheme to disadvantaged groups. For others, an e-cigarette friendly service was conceptualized in a passive sense, as one which welcomed service users using e-cigarettes. Many services did not use the 'e-cigarette friendly' claim in their branding or promotional material. Several discursive themes underlay differing staff attitudes. Those more reluctant to engage framed this in terms of their 'duty of care', with concerns focusing on the addictiveness of nicotine, lack of medically licensed product and ongoing scientific controversy. Those motivated to engage drew on a discourse of social justice goals and 'doing things differently' in relation to lower socio-economic status smokers, those with mental health issues and other vulnerable groups. Strong public health leadership was also identified as a key factor in changing staff attitudes towards e-cigarettes.

CONCLUSIONS

On-the-ground enactment of e-cigarette friendly services is varied as well as reflective of the wider policy and regulatory environment. Although the context of English stop smoking services is one of austerity and change, there are opportunities for active engagement with e-cigarettes to achieve overall cessation goals. For this to occur, training, policy consistency and sharing best practice are needed.

Exploring Physician Attitudes Regarding Electronic Documentation of E-cigarette Use: A Qualitative Study

Background:

In this article, we present qualitative work designed to explore physicians’ attitudes toward and knowledge of electronic cigarettes (or Electronic Nicotine Delivery Systems—ENDS), particularly focusing on personal attitudes held by physicians regarding ENDS use, physician beliefs regarding the relative safety of ENDS, attitudes regarding the efficacy of ENDS as a smoking cessation tool, and how physicians’ document ENDS use in the electronic health record (EHR).

Methods:

We completed a total of 17 semistructured qualitative interviews with physicians in 4 different outpatient clinic locations. Clinics were selected with the goal of reaching patient panels across a diversity of socioeconomic and local geographic locations.

Results:

The findings from our qualitative analysis suggest that physicians feel uninformed about the long-term health risks of ENDS and believe that they lack the critical medical knowledge required for discussing ENDS with their patients who smoke. Although physician responses did not endorse the view that ENDS use is a safer alternative to combustible tobacco use, approximately one-third of our physician sample did not hold strong objections to ENDS usage. Physicians placed varying degrees of importance on the issue of ENDS documentation practices.

Discussion:

Three overarching themes were revealed from our analysis. These themes included (1) physicians’ attitudes regarding the use of ENDS for smoking cessation, (2) physicians’ guidance and advisement to patients in the use of ENDS for smoking cessation, and (3) current practices of clinical documentation of ENDS use in an EHR. Our qualitative results indicate that physicians in our study rarely screen patients for ENDS use, even for those patients who are both documented smokers and recipients of physician-led tobacco cessation counseling. However, most physicians agreed that the prospect of creating a structured data field specifically for the documentation of ENDS use within the EHR would result in the likelihood of increased screening and documentation of ENDS use patterns.

Pain Therapy Guided by Purpose and Perspective in Light of the Opioid Epidemic

Prescription opioid misuse is an ongoing and escalating epidemic. Although these pharmacological agents are highly effective analgesics prescribed for different types of pain, opioids also induce euphoria, leading to increasing diversion and misuse. Opioid use and related mortalities have developed in spite of initial claims that OxyContin, one of the first opioids prescribed in the USA, was not addictive in the presence of pain. These claims allayed the fears of clinicians and contributed to an increase in the number of prescriptions, quantity of drugs manufactured, and the unforeseen diversion of these drugs for non-medical uses. Understanding the history of opioid drug development, the widespread marketing campaign for opioids, the immense financial incentive behind the treatment of pain, and vulnerable socioeconomic and physical demographics for opioid misuse give perspective on the current epidemic as an American-born problem that has expanded to global significance. In light of the current worldwide opioid epidemic, it is imperative that novel opioids are developed to treat pain without inducing the euphoria that fosters physical dependence and addiction. We describe insights from preclinical findings on the properties of opioid drugs that offer insights into improving abuse-deterrent formulations. One finding is that the ability of some agonists to activate one pathway over another, or agonist bias, can predict whether several novel opioid compounds bear promise in treating pain without causing reward among other off-target effects. In addition, we outline how the pharmacokinetic profile of each opioid contributes to their potential for misuse and discuss the emergence of mixed agonists as a promising pipeline of opioid-based analgesics. These insights from preclinical findings can be used to more effectively identify opioids that treat pain without causing physical dependence and subsequent opioid abuse.

A typology of vaping: Identifying differing beliefs, motivations for use, identity and political interest amongst e-cigarette users

BACKGROUND

The aim of this study was to identify and differentiate socially shared accounts of e-cigarette use (vaping) using Q-methodology, combining factor analysis with qualitative comments.

METHODS

Seventy statements on e-cigarettes, drawn from media, academic and online discussions, were sorted by participants along a continuum of agreement/disagreement, commenting on strongly ranked items. Each participant thus created their own 'account' of their vaping. A by-person correlation matrix of the sorts was conducted, then factor analysed, to identify similar accounts (p<0.01). Fifty-five UK vapers participated by post, 55% male, mean age of 46, 84% only vaping/16% vaping and smoking, 95% vaping daily.

RESULTS

Three accounts of e-cigarettes were identified. The first two were associated with having quit smoking; the third with ongoing tobacco smoking and vaping. In Factor One, 'Vaping as Pleasure', vaping was characterized as enjoyable, with long-term use envisaged and a medical model of vaping rejected. Factor One participants also held a strong vaping identity and were politically motivated to maintain the rights of adults to vape. In Factor Two, 'Vaping as Medical Treatment', vaping was understood as a pragmatic choice about how to medicate one's smoking addiction, with the aim being to treat and ultimately reduce nicotine dependence. In Factor Three, 'Ambivalent E-Cigarette Use', participants reported fewer benefits and harboured more negative beliefs about e-cigarettes; they also strongly rejected a vaper identity, having no interest in online forums or being labelled a 'vaper' themselves.

CONCLUSION

The UK e-cigarette users in this sample were not a homogeneous group; differing in their beliefs, motivations for use, identity and political interest. In particular they diverged on whether they accepted a medicalized account of vaping and identified as a vaper. Public health messages targeted to one group of e-cigarette users may not resonate with others.

Vaporised nicotine and tobacco harm reduction for addressing smoking among people living with HIV: A cross-sectional survey of Australian HIV health practitioners' attitudes

BACKGROUND

Tobacco smoking is a major cause of morbidity and mortality among people living with HIV (PLHIV). Due to the limited success of standard abstinence-focused smoking cessation strategies in this population, there is growing interest in tobacco harm reduction (THR) approaches as an additional strategy to address these high smoking rates. This study explored the attitudes of health practitioners who provide healthcare to PLHIV towards THR.

METHODS

179 Australian health practitioners who provide healthcare to PLHIV completed an online survey that measured their attitudes towards THR approaches, including switching from cigarettes to e-cigarettes or vaporised nicotine products (VNPs).

RESULTS

Respondents supported the concept of THR but were undecided on the role of VNPs. Respondents most commonly reported 'don't know' or 'undecided' responses to statements regarding VNPs. More respondents, however, agreed than disagreed that switching from smoking to long-term vaping could reduce risk (36% and 22% respectively) and be an effective strategy to help PLHIV to quit smoking (37% agree and 17% disagree). Only a minority of respondents (20%) agreed that VNPs are too harmful to recommend to patients, however around half (53%) were undecided.

CONCLUSIONS

Despite supporting the principle of THR, health practitioners may require more evidence and knowledge about VNPs before being willing to consider them as a suitable intervention strategy.

The knowledge, concerns and healthcare practices among physicians regarding electronic cigarettes

Background: Electronic cigarettes (e-cigarettes) are battery-powered devices that deliver aerosolized nicotine. With easy access and over-the-counter availability, many patients consider using electronic cigarettes for smoking cessation. Few studies have looked at long-term safety/efficacy and physician knowledge/attitudes toward e-cigarettes. Physicians have insufficient guidelines for advising their patients about e-cigarettes.

Objective: 1) To identify knowledge and attitude of health care practitioners toward electronic cigarettes. 2) To identify the effect of level of training, experience and speciality on knowledge and practice of electronic cigarettes. 3) To identify factors influencing electronic cigarettes advise/prescribing practice.

Methods: An anonymous online questionnaire was sent to residents, fellows, and faculty in pre-selected specialties at Saint Louis University (SLU) Hospital.

Results: We received 115 responses. Nine percent reported being ‘very familiar’ with e-cigarettes, while 25% reported no familiarity; 18% of physicians would advise e-cigarettes as nicotine-replacement therapy if asked by patients; 91% were aware of the nicotine content of e-cigarettes, but only 20% and 39%, respectively, were aware of the presence of carcinogens and polyethylene glycol. Only 63% of respondents knew what ‘vape’ meant. Lack of evidence regarding long-term safety (76%), e-cigarettes as starter products for nonsmokers (50%), absence of Food and Drug Administration (FDA) regulations (51%) and marketing to youth (42%) were major concerns. Stricter regulations (54%), warning labels similar to tobacco products (53%), restricting advertising (36%), banning sales to minors (34%), and banning use in public spaces (25%) were favored as regulatory measures. More than 50% of physicians see a role for e-cigarettes as part of ‘harm-reduction strategy’.

Conclusions: Further research is needed to assess whether e- cigarettes could be an effective smoking-cessation tool. There is an apparent knowledge deficit among physicians and an urgent need for evidence-based guidelines to aid with advising patients enquiring about e-cigarettes.

Overview of Electronic Nicotine Delivery Systems: A Systematic Review

CONTEXT

Rapid developments in e-cigarettes, or electronic nicotine delivery systems (ENDS), and the evolution of the overall tobacco product marketplace warrant frequent evaluation of the published literature. The purpose of this article is to report updated findings from a comprehensive review of the published scientific literature on ENDS.

EVIDENCE ACQUISITION

The authors conducted a systematic review of published empirical research literature on ENDS through May 31, 2016, using a detailed search strategy in the PubMed electronic database, expert review, and additional targeted searches. Included studies presented empirical findings and were coded to at least one of nine topics: (1) Product Features; (2) Health Effects; (3) Consumer Perceptions; (4) Patterns of Use; (5) Potential to Induce Dependence; (6) Smoking Cessation; (7) Marketing and Communication; (8) Sales; and (9) Policies; reviews and commentaries were excluded. Data from included studies were extracted by multiple coders (October 2015 to August 2016) into a standardized form and synthesized qualitatively by topic.

EVIDENCE SYNTHESIS

There were 687 articles included in this systematic review. The majority of studies assessed patterns of ENDS use and consumer perceptions of ENDS, followed by studies examining health effects of vaping and product features.

CONCLUSIONS

Studies indicate that ENDS are increasing in use, particularly among current smokers, pose substantially less harm to smokers than cigarettes, are being used to reduce/quit smoking, and are widely available. More longitudinal studies and controlled trials are needed to evaluate the impact of ENDS on population-level tobacco use and determine the health effects of longer-term vaping.