Examining Use and Dual Use of Tobacco Products and Marijuana among Minnesota Adults.

BACKGROUND: An increasing number of states are legalizing the medicinal and/or recreational use of marijuana. Adult perceptions of harm have decreased and marijuana use has increased. This is in contrast to declining cigarette smoking. In this article we examine independent use and dual use of marijuana and tobacco products. METHODS: Data are from the 2018 Minnesota Adult Tobacco Survey (N = 6055). Estimates were calibrated on sex, race, location, and education from the American Community Survey. RESULTS: In 2018, 15.4% of adults smoked cigarettes in the past 30 days, 7.6% used marijuana and 6.0%, 3.0%, and 1.1% used e-cigarettes, cigars, and waterpipe, respectively. Use of marijuana and cigarettes was 3.3% and use of marijuana and e-cigarettes was 2.2%. Among past 30-day marijuana users, 89.7% smoked it as a joint, blunt, or in waterpipes, 22.1% vaped it in an e-cigarette or a vaping device. Across multinomial regression models, marijuana use and dual use with tobacco products was more likely among males, younger age groups, and African Americans. CONCLUSIONS: As policies to expand the sale and use of marijuana are considered, states should anticipate the need to monitor trends and to plan surveys of sufficient sample size with specific questions on marijuana use. Understanding the proportion of the population that uses both marijuana and tobacco has implications for prevention and treatment of both substances.

Engaging Smokeless Tobacco Users in Population-Based Cessation Services: Findings From an Observational Study.

Although telephone quitlines are effective for helping smokeless tobacco (ST) users quit, ST users are underrepresented among quitline participants. After ClearWay MinnesotaSM implemented multiple changes to its quitline service (QUITPLAN® Services), utilization increased dramatically, including by ST users. We examined data from Minnesota and Wisconsin to determine whether these changes were unique to Minnesota. Four years of quitline registration data were analyzed for both states. A significant increase in enrollees reporting any ST use was seen in Minnesota after changes were made to services; no change was seen in Wisconsin. A 2-week starter kit of nicotine replacement therapy and the ability to register for services online were popular among Minnesotans reporting ST use. This study suggests that quitline services can be designed to increase participation by ST users.

"Because There's Just Something About That Menthol": Exploring African American Smokers' Perspectives on Menthol Smoking and Local Menthol Sales Restrictions.

INTRODUCTION: Local governments are pursuing policies to limit the availability of menthol cigarettes at the point-of-sale. Although African Americans are disproportionately impacted by menthol cigarettes, little is known about African American smokers' perspectives on emerging menthol policy. The purpose of this study was to fill a gap in the literature by exploring African American adult (25+) smoker perspectives on menthol and a local menthol sales restriction. METHODS: In-depth semi-structured interviews were conducted with African American smokers (n = 27) in the Minneapolis-St. Paul area June-September 2017. Interviews explored smoking behaviors, harm perceptions, perspectives of menthol in the community and reactions to local menthol sales restrictions. The framework method guided identification of key themes and synthesis of findings. RESULTS: Almost all (96%) participants smoked Newport cigarettes. The majority of participants indicated that menthol cigarettes were more harmful than non-menthol cigarettes, citing strength and additives and because they were targeted to African Americans. Some participants were receptive to policy change while others viewed the policy as inconvenient and unfair. Overall, there was a lack of understanding of the policy's intended public health impact. Some participants indicated that the policy would have no impact on their purchasing or smoking behaviors while others who were contemplating quitting noted that a menthol restriction was encouragement to prompt a quit attempt. CONCLUSIONS: Sales restrictions can provide a unique opportunity to persuade menthol smokers to quit. Efforts are needed to increase awareness and support of these policies as well as to support African American menthol smokers achieve cessation. IMPLICATIONS: There is growing momentum to restrict local menthol tobacco sales; however, little is known about perceptions among populations most impacted. In Minneapolis-St. Paul, where menthol restrictions were passed in 2017, African American smokers expressed limited awareness and uneven policy support. While some participants were unconvinced the restriction would impact smoking, others indicated it would encourage decreased consumption and prompt quit attempts. There is a need for public education to increase awareness of menthol's harms, to help menthol smokers quit, and to increase support for menthol policies.

Defining adult e-cigarette prevalence: comparing a categorical definition with days of use.

INTRODUCTION: Electronic cigarette use has grown substantially and the health effects are being closely monitored. Tracking the evolving market place and the profile of adult users is important for tobacco control efforts; however, several different ways of measuring current use have been reported. This paper examines how well a categorical definition aligns with days of use. METHODS: Data from the 2018 Minnesota Adult Tobacco Survey assessed e-cigarette use based on days of use in the past month and currently using 'every day, some days, or not at all'. Prevalence of current use and agreement of >1, >5 and >20 days of use with every day or some days were calculated. RESULTS: The prevalence of e-cigarette use varied by category of use from 2.4% (≥20 days/30) to 6.0% (≥1 day/30). The highest prevalence was found among young adults reporting any use in the past 30 days (21.9%). Never smokers had low prevalence overall; however, 4.4% reported using in the past 30 days. Using at least 1 day in the past 30 days included a higher proportion of young adults (p<0.001) and never smokers (p<0.001) compared with other current use categories. Compared with every day or some days, the per cent agreement with days of use categories ranged from 89.7% to 94.4% and kappa ranged from 0.60 to 0.81. CONCLUSIONS: Prevalence and sociodemographics varied by definition of use. Asking 'every day, some days or not at all' in population-based studies has the advantage of aligning with cigarette smoking current use definition.

Perceived harm of menthol cigarettes and quitting behaviors among menthol smokers in Minnesota.

Although overall smoking prevalence in Minnesota has declined, the proportion of current smokers who smoke menthol cigarettes has increased. While studies have examined associations between smokers' perceived risks of smoking and quitting, similar studies on menthol smoking are lacking. This study examined whether perceived harm of menthol cigarettes was associated with menthol smokers' quitting behaviors. Data from the 2018 Minnesota Adult Tobacco Survey were examined. Respondents were categorized as current menthol smokers (n = 200), current nonmenthol smokers (n = 527), or nonsmokers (n = 5324). All were asked four questions to assess their perceptions of menthol cigarettes' harm compared to nonmenthols. Sum scores were calculated (range 0-4); higher scores indicated perceptions of similar or greater harm. Data on menthol smokers' quitting behaviors were analyzed to identify associations between sum scores and quitting behavior. Data were analyzed using Wilcoxon Rank Sum tests and Spearman Rank Correlation tests. Additional analyses examined whether gender, age, race/ethnicity, education or income moderated the association between sum scores and past 12-month quit attempts. Menthol smokers were less likely to answer the harm perception questions correctly than nonmenthol smokers. Among menthol smokers, perceived harm of menthol cigarettes was positively associated with past 12-month quit attempts (p = 0.006), use of counseling/behavioral support (p = 0.012), and number of quit attempts (p = 0.004). No demographic characteristics moderated the association between sum scores and past 12-month quit attempts. Findings suggest that efforts to increase menthol smokers' perceptions of menthol cigarettes' harm may potentially increase quitting behaviors. Understanding this association can inform interventions to increase quit attempts.

Location and duration of secondhand smoke exposure among Minnesota Nonsmokers, 2018.

In 2007 Minnesota passed into law a comprehensive ban on indoor smoking of tobacco products in public places including bars, restaurants, and workplaces. Despite reductions in smoking prevalence in the past 12 years, people are still exposed to secondhand smoke (SHS). It remains important to understand where and how long nonsmokers face exposure to SHS. The 2018 Minnesota Adult Tobacco Survey was analyzed to examine self-reported SHS exposure among nonsmoking adults. We report prevalence and 95 percent confidence intervals of SHS exposure overall, by specific locations, and by demographics. Length of exposure to SHS was summarized in median minutes. Overall, 30 percent of nonsmokers reported exposure in the past seven days. A total of 1382 participants indicated a location of exposure. The most common locations other than one's own home or car included building entrances (18.7 [16.2-21.1] percent), somewhere else outdoors (17.7 [15.1-20.3] percent), and restaurant/bar patios (12.8 [10.5-15.0] percent). Exposure was more likely to be reported by young adults (44.6 percent) and males (33.7 percent). The locations with the longest duration of SHS exposure in the prior seven days were a gambling venue (117.2 [72.2-162.2] minutes), another person's home (26.1 [15.4-36.8] minutes), and a bus stop (10.8 [4.7-16.9] minutes). Monitoring nonsmokers' self-reported exposure to SHS remains important as a way to measure the impact and compliance with smoke-free policies. Additional information on the location and duration of exposure can be used programmatically to address high levels of exposure and consider additional policies or strategies.

Who is using and why: Prevalence and perceptions of using and not using electronic cigarettes in a statewide survey of adults.

A statewide survey examined prevalence, reasons for using, discontinuing use, and not wanting to try e-cigarettes. METHODS: Participants (n = 6052) were adult Minnesota residents. E-cigarette initiation and current use prevalence rates were calculated for demographic characteristics and smoking status. The percent of respondents endorsing a reason for trying e-cigarettes are reported overall and by smoking status. The percent of respondents endorsing each reason for discontinuing or not using e-cigarettes are reported for daily and occasional smokers. All descriptive analyses were weighted. To develop profiles of e-cigarette users, a latent class analysis (LCA) was undertaken. RESULTS: Overall, 20.7% of adults reported ever use and 4.6% were current users. Use varied notably by age and smoking status. Only 2.8% of never smokers were current e-cigarette users. Among young adults, 14.6% reported current use but most (70.0%) were never smokers. The reasons given for using e-cigarettes varied by smoking status. Curiosity was the top reason for all groups except recent former smokers, for whom cutting down or quitting other tobacco products was primary. Most smokers discontinuing e-cigarettes preferred cigarettes, and four-fifths of smokers who never tried e-cigarettes lacked interest. From the LCA four profiles were evident: young adult experimenters, curious adults, smokers trying to quit cigarettes, and dual users. CONCLUSIONS: Innovative higher nicotine content devices have sustained interest in e-cigarettes especially among young adults and smokers with a goal of cutting down or quitting smoking. Future regulations and communication should focus on reducing e-cigarette use among young adult nonsmokers.

Household Implementation of Smoke-Free Rules in Homes and Cars: A Focus on Adolescent Smoking Behavior and Secondhand Smoke Exposure.

PURPOSE: This study addresses the dearth of population-based research on how comprehensive household smoke-free rules (ie, in the home and car) relate to tobacco use and secondhand smoke (SHS) exposure among adolescents. DESIGN: Analysis of 2014 Minnesota Youth Tobacco Survey. SETTING: Representative sample of Minnesota youth. PARTICIPANTS: A total of 1287 youth who lived with a smoker. MEASURES: Measures included household smoke-free rules (no rules, partial rules-home or car, but not both-and comprehensive rules), lifetime and 30-day cigarette use, 30-day cigarette and other product use, and SHS exposure in past 7 days in home and car. ANALYSIS: Weighted multivariate logistic, zero-inflated Poisson, and zero-inflated negative binomial regressions were used. RESULTS: Compared to comprehensive rules, partial and no smoke-free rules were significantly and positively related to lifetime cigarette use (respectively, adjusted odds ratio [AOR] = 1.80, 95% confidence interval [CI] = 1.24-2.61; AOR = 2.87, 95% CI = 1.93-4.25), and a similar significant pattern was found for 30-day cigarette use (respectively, AOR = 2.20, 95% CI = 1.21-4.02; AOR = 2.45, 95% CI = 1.34-4.50). No smoke-free rules significantly predicted using cigarettes and other tobacco products compared to comprehensive rules. In both descriptive and regression analyses, we found SHS exposure rates in both the home and car were significantly lower among youth whose household implemented comprehensive smoke-free rules. CONCLUSIONS: Comprehensive smoke-free rules protect youth from the harms of caregiver tobacco use. Relative to both partial and no smoke-free rules, comprehensive smoke-free rules have a marked impact on tobacco use and SHS exposure among youth who live with a smoker. Health promotion efforts should promote comprehensive smoke-free rules among all households and particularly households with children and adolescents.

Examining quit attempts and successful quitting after recent cigarette tax increases.

As cigarette smoking rates decline, an important policy question is whether increasing cigarette taxes will continue to encourage smoking cessation. We tested this question following recent tobacco tax increases. Data were from the Minnesota Adult Tobacco Survey, a serial cross-sectional telephone survey conducted statewide, and was limited to past-year cigarette smokers in 2010 (n = 1029) and 2014 (n = 1382). Weighted estimates were calculated of the prevalence of past year smokers, smokers who attempted to quit smoking, and those who successfully quit by demographics, tobacco use, use of evidence-based cessation assistance to quit, and smoker perceptions of the tax increases. Among past year smokers, almost 60% reported a quit attempt in both years, 12.8% successfully quit in 2010 and 15.6% in 2014. Although older age, daily smoking, mean cigarettes per day, and more days of e-cigarette use, were associated with quit attempts in unadjusted models, only the perceived tax increase effect (AOR = 8.9; 95% CI 6.3-12.5) and low nicotine dependence (AOR = 1.9, 95% CI 1.3-2.7) were associated with making a quit attempt in adjusted models. Successful 12-month quits were predicted by college education (AOR = 3.2, 95% CI 1.3-7.8), the use of cessation support (AOR = 2.1, 95% CI 1.3-3.6), and reporting the tax increase helped maintain a quit (AOR = 12.3, 95% CI 7.5-20.1). These findings suggest that a large tax increase is effective in promoting quitting even in the presence of strong tobacco control measures such as indoor smoking bans and other smoking restrictions, mass media campaigns, and universal access to cessation support.

Smoke-Free Rules in Homes and Cars Among Smokers and Nonsmokers in Minnesota.

We examined prevalence and predictors of comprehensive smoke-free household rules (ie, smoke-free homes and cars) among smokers and nonsmokers in Minnesota. Data came from the 2014 Minnesota Adult Tobacco Survey; weighted analyses consisted of descriptive analyses and multivariate logistic regression analyses. Most adult smokers implemented home-only smoke-free rules (43%) while most nonsmokers implemented comprehensive smoke-free rules (home and car; 85%). Comprehensive smoke-free rules were more common among people with high socioeconomic status (SES), married people, and people who did not live with a smoker; those with a child in the home were more likely to implement smoke-free homes but not smoke-free cars. Public health practitioners should focus on addressing the majority of smokers who do not implement comprehensive smoke-free household rules, such as low-SES populations, and addressing caregivers who do not implement smoke-free car rules.

Secondhand Smoke Exposure 7 Years After an Indoor Smoke-Free Law.

PURPOSE: To examine locations of secondhand smoke (SHS) exposure among nonsmokers, 7 years after a statewide smoke-free policy. DESIGN: Data collected via statewide, random digit dial telephone survey. Response rates were 64.7% for landline and 73.5% for cell phone. SETTING: Minnesota, 2014. PARTICIPANTS: Representative sample of 7887 nonsmoking adults. MEASURES: Self-reported locations of SHS exposure and opinions on smoke-free restrictions. ANALYSIS: Descriptive statistics and logistic regression. RESULTS: A total of 35.5% of nonsmokers reported SHS exposure in the past 7 days. The greatest proportion of exposure occurred in community settings (31.7%) followed by cars (6.9%) and in the home (3.2%). Young adults were more likely to be exposed in a home or car than older adults. Nonsmokers living with a smoker were 39.6 (20.6-75.8) times more likely to be exposed to SHS in their home and 5.3 (4.1-6.8) times more likely to be exposed in a car, compared to those who did not live with a smoker. CONCLUSION: SHS exposure continues after comprehensive smoke-free policies restricted it from public places. Disparities in exposure rates exist for those who live with a smoker, are young, and have low incomes. Findings suggest the need for additional policies that will have the greatest public health benefit.

Disparities in cigarette smoking and use of other tobacco products in Minnesota, 2003-14.

Background: Despite efforts to reduce disadvantages across society, widening health disparities have been observed in Minnesota. This research examined whether observed declines in state-wide smoking prevalence were experienced equally by all adults with varying educational attainment. Methods: Serial cross-sectional data from the 2003, 2007, 2010 and 2014 Minnesota Adult Tobacco Survey (MATS) were analyzed. Weighted regression analyses for smoking status, time to first cigarette, cigarettes per day and non-cigarette other tobacco products (OTP) were conducted across education levels. Results: Controlling for age and gender, a decreased rate of smoking among high and middle education groups was offset by an increase in the low education group. Dependence (time to first cigarette) was twice as high in the lowest education group compared to highest, yet dependence did not decline over time for any group. There was a decline in cigarettes per day in all education groups, but an increase in OTP use in the lowest and middle education groups. Conclusions: Given existing smoking disparities, novel efforts are urgently needed. Complementing known population-level strategies with community and individual-level approaches will be necessary to eliminate the widening gap in smoking disparities and to end the burden of tobacco-related disease.

Changes in cigarette expenditure minimising strategies before and after a cigarette tax increase.

BACKGROUND: Smokers use cigarette expenditure minimising strategies (CEMS) to alleviate the effect of tax increases on their cigarette expenses. We examined changes in smokers' CEMS use before and after a 2013 Minnesota $1.75 cigarette tax increase. METHODS: Data were from representative samples of smokers who participated in the Minnesota Adult Tobacco Survey 2010 (n=948) and 2014 (n=1229). Participants indicated CEMS used in the past year from a list. Weighted multiple logistic regressions were used to examine changes in prevalence of each CEMS use over time adjusting for demographics and cigarette consumption. Characteristics associated with CEMS use in 2014 were examined. RESULTS: Between 2010 and 2014, more smokers tried to save money on cigarettes by rolling their own cigarettes (from 19% to 29%), using other tobacco products (from 13% to 25%), and buying cigarettes from cheaper places (from 48% to 55%). Yet, fewer smokers used coupons/promotions (from 63% to 50%) and bought cigarettes by the carton (from 39% to 32%). These changes varied somewhat by race/ethnicity and education, for example, more smokers with

Testing and Refining Measures of Secondhand Smoke Exposure Among Smokers and Nonsmokers.

Introduction: Over the past few decades, tobacco control efforts have made great strides in making smoke-free air the norm; 30 states in the United States have implemented 100% smoke-free laws. Despite this progress, the evolution of the measurement of secondhand smoke (SHS) exposure has lagged. Methods: Cognitive testing was used to explore the functioning and limitations of current SHS surveillance items; many items are frequently used for statewide or national surveillance. A total of 20 nonsmokers and 17 smokers participated in a cognitive interview. Results: Overreporting of SHS was evidenced in our analysis as thirdhand smoke exposure was being included in the assessment of SHS exposure, likely due to the successful implementation of indoor smoking bans. Also asking about locations of SHS exposure outside of work, home, or a personal vehicle is important because these alternative locations were sometimes the only incidence of SHS exposure. Conclusions: Survey questions about SHS should: (1) reduce the ambiguity in words and phrases of items; (2) measure location of exposure; (3) measure duration of exposure; and (4) consider alternative strategies for asking smokers questions about SHS. Assessing location and duration of exposure can inform decision-makers about future SHS programming and policy work. Implications: Commonly accepted survey measures of SHS exposure need to be reevaluated to assure that the intended interpretation of them is still accurate given significant policy and social norm change. This paper assesses current SHS surveillance items and provides recommendations for revisions.

E-cigarette use among treatment-seeking smokers: Moderation of abstinence by use frequency.

INTRODUCTION: Emerging literature suggests that frequency of use of electronic cigarettes (e-cigarettes) may be an important moderating variable in the relationship between e-cigarette use and smoking cessation. However, few studies have focused specifically on treatment-seekers, a group that may differ in important ways from smokers in the general population. This study looks at the relationship between e-cigarette use frequency and abstinence among a sample of treatment-seeking tobacco users. METHODS: Seven-month follow-up survey data from N=2760 treatment-seeking tobacco users who utilized statewide tobacco quitlines in three states were used to assess the relationship between 30-day point prevalence abstinence and e-cigarette use frequency at follow-up. E-cigarette use was examined in two ways. First, we looked at any use in the past 30days versus no use. Additionally, past 30-day e-cigarette use frequency was categorized into four groups: 0days, 1-5days - infrequent, 6-29days - intermediate, 30days - daily. Logistic regression models were constructed predicting 30-day point prevalence tobacco abstinence. RESULTS: Both infrequent (AOR=0.35; CI=0.20-0.59) and intermediate (AOR=0.50; CI=0.32-0.80) past 30-day e-cigarette use were associated with lower rates of tobacco abstinence versus no past 30-day use. However, daily e-cigarette users (AOR=1.16; CI=0.71-1.70) had similar 30-day abstinence when compared to non-users. CONCLUSIONS: Results from this study of treatment-seekers support findings from studies of general population tobacco users that suggest frequency of e-cigarette use is an important moderating variable in the relationship between e-cigarette use and tobacco cessation. Future studies should employ more refined measures of e-cigarette use.

Behavioral change in response to a statewide tobacco tax increase and differences across socioeconomic status.

BACKGROUND: Tobacco use is a leading behavioral risk factor for morbidity and mortality, and the tobacco epidemic disproportionately affects low-socioeconomic status (SES) populations. Taxation is effective for reducing cigarette use, and it is an effective population-based policy for reducing SES-related tobacco disparities. However, progress in implementing cigarette excise taxes has stalled across the United States, and there is a dearth of research on the full spectrum of behavioral shifts that result from taxes, particularly among low-SES populations. This project documents the impact of Minnesota's $1.75 cigarette tax increase implemented in 2013. METHODS: Data come from the 2014 Minnesota Adult Tobacco Survey. Descriptive analyses and Latent Class Analysis (LCA) were used to provide a typology of the tax impact. RESULTS: From the LCA, six classes were identified, and 42% of respondents were classified as reporting action-oriented behavioral change related to the tax-8% reported sustained smoking abstinence. We found differential behavior change across levels of SES. Low-SES and medium/high-SES individuals were equally likely to report complete tobacco cessation, but the prevalence of daily smokers who reported action-oriented behavior without sustained cessation was nearly double for low-SES individuals. CONCLUSIONS: Smokers report a range of behavioral changes in response to cigarette taxes, with differences across SES. The majority of smokers, and particularly low-SES smokers, report behavioral steps toward quitting or achieving sustained tobacco cessation in response to cigarette taxes. Complementary population-based programs geared toward assisting individuals, especially low-SES individuals, to achieve continuous tobacco cessation could increase the reach and effectiveness of cigarette taxes.

The Effect of Tobacco Control Policies on US Smokeless Tobacco Use: A Structured Review.

INTRODUCTION: Tobacco use has shifted increasingly from cigarettes to other products. While the focus has been mostly on cigarette-oriented policies, it is important to gauge the effects of policies targeting other products. We review and critique the literature on how policies affect smokeless tobacco (ST). METHODS: We conducted a search of the literature on tobacco control policies as they relate to ST use, focusing on tobacco taxes, smoke-free air laws, media campaigns, advertising restrictions, health warnings, cessation treatment policies, and youth access policies. Findings from 78 total studies are summarized. RESULTS: ST taxes, media campaigns, health warnings, and cessation treatment policies were found to be effective tools in reducing ST use. Evidence on the effects of current youth access policies is less strong. Studies have not yet been conducted on marketing or product content restrictions, but the literature indicates that product marketing, through advertising, packaging, flavorings, and extension of cigarette brands, plays an important role in ST use. CONCLUSIONS: Although the evidence base is less established for ST policies than for cigarette policies, the existing literature indicates ST use responds to tobacco control policies. Policies should be structured in a way that aims to reduce all tobacco use while at the same time increasing the likelihood that continuing tobacco users use the least risky products. IMPLICATIONS: Studies find that policies targeting smoking and policies targeting smokeless products affect smokeless use, but studies are needed to examine the effect of policies on the transitions between cigarette and smokeless use.

E-cigarette use 1†year later in a population-based prospective cohort.

BACKGROUND: Population prevalence estimates of electronic nicotine delivery system (ENDS) use range considerably based on the operational definition of 'use'. Recently, we investigated the utility of 'use frequency' for restricting prevalence estimates to non-experimenters in adult populations. Results suggested that individuals reporting use on ≤5 days in the past 30 were likely to discontinue use, and should be excluded from estimates of population prevalence. OBJECTIVE: This study investigated the predictive validity of ENDS use frequency as a measure for likelihood of continued use, and cigarette smoking abstinence. METHODS: We recontacted smokers and recent quitters who participated in the random digit dial 2014 Minnesota Adult Tobacco Survey. At ∼1 year follow-up, we reassessed ENDS use and cigarette smoking among N=601 respondents. RESULTS: Fewer than half of respondents who reported using ENDSs on 1-5 days in the past 30 at baseline reported any ENDS use 1 year later (27%, 95% CI (18% to 40%)). Conversely, more than half of respondents who reported daily use at baseline also reported subsequent use at follow-up (89%, 95% CI (78% to 100%)). The likelihood of subsequent ENDS use by respondents using ENDSs on more than 5 days but less than daily did not significantly differ from chance (37%, 95% CI (22% to 61%)). CONCLUSIONS: For adult population surveillance surveys, defining current use prevalence as 'any use in the past 30 days' includes many individuals who can be expected to discontinue use within 1 year. Until measures of ENDS use become standardised, researchers should choose definitions carefully because different definitions are likely to yield different results.

Raising the Minimum Legal Sale Age for Tobacco to 21: The Estimated Effect for Minnesota.

A campaign to raise the minimum legal sale age for tobacco products from 18 to 21 years known as Tobacco 21 is having a nationwide impact, with at least 200 localities in 14 states having already implemented a Tobacco 21 policy. A 2015 report from the Institute of Medicine (IOM) estimated the effects of such policy on cigarette use at the national level; however, little is known about the expected effects for individual states. The purpose of this study was to consider the effect on smoking initiation in Minnesota if the minimum sale age were 21 in 2015. Estimates from the Minnesota Adolescent Community Cohort and Minnesota Adult Tobacco Survey were used to calculate the uptake of smoking in a hypothetical cohort of Minnesota adolescents 15 to 20 years of age. Expected reductions in initiation in the IOM report were used to calculate the effects of Tobacco 21 policy on smoking uptake in this cohort. Results revealed that raising the sale age to 21 in 2015 would prevent 3,355 young Minnesotans from starting to smoke.