Correlates of tobacco product initiation among youth and young adults between waves 1-4 of the population assessment of tobacco and Health (PATH) study (2013-2018).

INTRODUCTION: While risk factors for cigarette smoking among youth and young adults are well-documented, less is known about the correlates of initiation of other tobacco products. This study aims to provide estimates and correlates of initiation among U.S. youth and young adults. METHODS: Data on youth aged 12-17 (n = 10,072) and young adults aged 18-24 (N = 5,727) who provided information on cigarettes, electronic nicotine delivery systems (ENDS), cigars, pipe, hookah and smokeless tobacco use in Wave 1 (W1: 2013-2014)-Wave 4 (W4: 2016-2018) of the nationally-representative PATH Study were used to calculate ever use initiation and correlates of initiation by W4. RESULTS: Nearly 6 million youth and 2.5 million young adults used tobacco for the first time between W1-W4. Approximately one quarter of youth and young adult ENDS never users initiated ENDS between W1-W4 of the PATH Study. Among youth, use of other tobacco products, ever substance use, and high externalizing problems were associated with initiation of most products. Among young adults, use of other tobacco products and ever substance use were associated with initiation of most products. In both youth and young adults, Hispanics were more likely to initiate hookah use than their non-Hispanic White counterparts. While male sex was a risk factor for most tobacco product initiation across both age groups, it was not associated with hookah initiation. CONCLUSIONS: Cigarette and non-cigarette products shared many correlates of initiation, although there are noteworthy demographic differences. Findings can help tailor product specific interventions to reach populations at risk during preliminary stages of use.

Factors associated with changes in flavored tobacco products used: Findings from wave 2 and wave 3 (2014-2016) of the population assessment of tobacco and health (PATH) study.

INTRODUCTION: Flavored non-cigarette tobacco product use is widespread in the U.S. The availability of flavor options could be playing a role in recent increases in use, especially for non-cigarette tobacco products, among youth and young adults. Little is known about specific flavor preferences of youth and adult flavored tobacco product users, as well as how preferences may change over time. METHODS: This study analyzes PATH Study data from completed Wave 2 (2014-2015) and Wave 3 (2015-2016) youth (12-17 years), and adult (18 + years) interviews to estimate the prevalence of flavored non-cigarette tobacco product use. We assess flavor switching by examining changes between flavors and characteristics of those who changed flavors between waves. RESULTS: Across age groups, and at both waves, fruit-flavored products were the most frequently used flavor by past 30-day electronic nicotine delivery systems (ENDS), cigar, cigarillo, and hookah users. In the past 30 days, a higher proportion of youth and young adults used candy/sweets-flavored ENDS than adults. Among adult ENDS users, the odds of changing flavors were highest among younger users and decreased with increasing age. CONCLUSIONS: Flavored tobacco product use is prevalent across non-cigarette tobacco products. Stability in the number of flavors used, as well as specific flavors, is higher among adult tobacco users, while the use of multiple flavors, and change in specific flavor, is more prevalent among youth tobacco users. Additional longitudinal research can further examine the role flavors play in appeal, product trial, and switching.

Qualitative insights on how adult e-cigarette users describe quantity of e-cigarettes used - PATH Study 2018.

The purpose of this qualitative study was to gain a deeper understanding of how adult e-cigarette users describe quantity of e-cigarettes used. Data for this analysis came from a qualitative study of U.S. adult dual e-cigarette and cigarette users and former cigarette smokers aged 18 years and older. Eligible respondents from Wave 4 (2016-2017) of the Population Assessment of Tobacco and Health (PATH) Study responded to a brief web questionnaire and participated in an in-depth telephone interview (n = 112) between March and August 2018. Using the respondent's native terminology for their e-cigarette device, interviewers asked respondents to describe in their own words the quantity of e-cigarettes used. Using NVivo software, interview transcripts were coded and analyzed to identify themes and patterns. Respondents described quantity used in three different ways: number of times and/or puffs; device-specific terms (i.e., replacement of disposable devices, cartridges/pods; use of e-liquid); and perceived equivalence to a quantity of traditional cigarettes. The most commonly reported approach across all device types and levels of device proficiency, although with varying ease and specificity, was the number of times and/or puffs taken in a day. Several respondents used multiple approaches to describe quantity. E-cigarette users use a variety of approaches to describe quantity of e-cigarette used, contributing to challenges developing standardized survey measures. The variety of approaches should be taken into consideration along with device type and other contextual factors such as device proficiency when developing survey questions.

Perceived relative harm of using e-cigarettes predicts future product switching among US adult cigarette and e-cigarette dual users.

BACKGROUND AND AIMS: People's perceptions of the harmfulness of e-cigarettes, compared with cigarettes, may influence their product use decisions. We tested if perceiving e-cigarettes as less harmful than cigarettes predicted whether cigarette and e-cigarette dual users switched their product use status 1 year later, becoming exclusive e-cigarette users, exclusive cigarette smokers, or non-users of both product types. DESIGN: Longitudinal analyses of waves 2 (2014-15) and 3 (2015-16) of the prospective, national Population Assessment of Tobacco and Health (PATH) Study. SETTING: United States. PARTICIPANTS: Adults who reported using both cigarettes and e-cigarettes within the past 30 days at wave 2 reported their perceptions of e-cigarette harm at wave 2, and reported whether they used cigarettes and e-cigarettes within the past 30 days at wave 3 (n = 2211). MEASUREMENTS: The key predictor was wave 2 perceptions of e-cigarette harm compared with cigarettes ('less harmful,' 'about the same', 'more harmful' or 'don't know'). The key outcome was wave 3 past 30-day use of e-cigarettes and cigarettes, classified into four categories: exclusive e-cigarette use (i.e. use of e-cigarettes but not cigarettes), exclusive cigarette smoking (i.e. use of cigarettes but not e-cigarettes), dual use of both product types and non-use of both product types. FINDINGS: At wave 2, 59.4% of dual users perceived e-cigarettes as less harmful than cigarettes [95% confidence interval (CI) = 56.9, 61.9]. Compared with those with other perceptions of e-cigarette harm, dual users who perceived e-cigarettes as less harmful than cigarettes were more likely to become exclusive e-cigarette users 1 year later [7.5 versus 2.7%; adjusted odds ratio (aOR) = 2.9, 95% CI = 1.7-4.8], more likely to remain dual users (39.6 versus 29.9%; aOR = 1.5, 95% CI = 1.2-1.8), less likely to become exclusive cigarette smokers (44.8 versus 59.4%; aOR = 0.6, 95% CI = 0.5-0.7) and similarly likely to become non-users of both product types (8.2 versus 8.0%; aOR = 1.1, 95% CI = 0.7-1.7). CONCLUSIONS: US adult dual users of e-cigarettes and cigarettes who perceive e-cigarettes as less harmful than cigarettes appear to be more likely to switch to exclusive e-cigarette use, more likely to remain dual users and less likely to switch to exclusive cigarette use 1 year later than dual users with other perceptions of e-cigarette harm.