A Difference-in-Differences Analysis of Youth Smoking and a Ban on Sales of Flavored Tobacco Products in San Francisco, California.
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ABSTRACT:
SUBMITTER: Friedman AS
PROVIDER: S-EPMC8145156 | biostudies-literature | 2021 Aug
REPOSITORIES: biostudies-literature
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A Difference-in-Differences Analysis of Youth Smoking and a Ban on Sales of Flavored Tobacco Products in San Francisco, California.
JAMA pediatrics 20210801 8
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Project description:ObjectiveFlavors play an important role in the initiation and use of tobacco products. The FDA, states, and cities have been implementing or considering banning flavored e-cigarettes or any flavored tobacco products. This study empirically assessed the impact of one of the first comprehensive bans of all flavored tobacco products other than tobacco-flavored e-cigarettes among young adults in San Francisco, California.MethodsUsing Amazon Mechanical Turk, a sample of San Francisco residents aged 18-34 who previously used tobacco products (N = 247) were surveyed about their tobacco use both before and after the ban. Descriptive statistics and regression models were applied.ResultsThe prevalence of overall flavored tobacco use decreased from 81% and 85% to 69% and 76% for 18-24 years and 25-34 years old, respectively. The prevalence of flavored e-cigarettes decreased from 57% and 56% to 45% and 48% for 18-24 years and 25-34 years old, respectively. The prevalence of cigars uses reduced as well. However, cigarette smoking increased, although not statistically significant among 25-34 years old. 66% of participants did not support the ban and 65% believed the ban had not been enforced completely. Most users reported being able to obtain flavored tobacco products in multiple ways despite the ban.ConclusionsThese findings suggest that comprehensive local flavor bans, by themselves, cannot sharply reduce the availability or use of flavored tobacco products among residents. Nevertheless, local bans can still significantly reduce overall e-cigarette use and cigar smoking but may increase cigarette smoking.
| S-EPMC7186365 | biostudies-literature
Project description:IntroductionFlavored tobacco sales restrictions (FTSRs) are implemented to reduce access to flavored tobacco products. We examined the association between seven cities with local FTSRs implemented in 2018/2019 and e-cigarette use among high school students in the California Bay Area.Aims and methodsWe analyzed data from the California Healthy Kids Survey using a difference-in-differences (D-I-D) strategy. We compared pre- and post-policy changes one year after implementation in current and ever e-cigarette use among students attending school in a city with a FTSR (exposed) (n = 20 832) versus without (unexposed) (n = 66 126). Other outcomes included ever marijuana use in an e-cigarette and ease of access to e-cigarettes.ResultsPre- to post-policy, the adjusted odds of current and ever e-cigarette use did not significantly change among students exposed and unexposed to a FTSR. In the adjusted D-I-D analysis, the odds of current (aOR: 1.25, 95% CI: 0.95, 1.65) and ever e-cigarette use (aOR: 1.06, 95% CI: 0.89, 1.26) did not significantly change by exposure group. However, one year post-implementation, the odds of ease of access to e-cigarettes significantly increased among exposed (aOR: 1.57, 95% CI: 1.27, 1.95) and unexposed students (aOR: 1.54, 95% CI: 1.39, 1.70). Similarly, the odds of ever using marijuana in an e-cigarette significantly increased among exposed (aOR: 1.35, 95% CI: 1.19, 1.53) and unexposed students (aOR: 1.29, 95% CI: 1.20, 1.39).ConclusionsLocal FTSRs in the California Bay Area were not associated with a change in e-cigarette use one year post-implementation. Increased ease of access and marijuana use may be explanatory factors.ImplicationsFTSRs were not associated with a decrease in current or ever e-cigarette use among high school students in the California Bay Area one-year post-implementation. Potential explanatory factors are that ease of access to e-cigarettes and using marijuana in an e-cigarette increased. More research is needed to understand the influence of these factors on youth access and behaviors. To address the youth e-cigarette epidemic, a comprehensive approach is needed, including policies, media campaigns, education programs, and cessation tools targeted to youth.
| S-EPMC9717361 | biostudies-literature
Project description:ObjectiveThis study examined differences in the availability and advertising of flavored tobacco products before and after flavored tobacco sales restrictions were enacted in Alameda and San Francisco Counties in California.Main outcome measuresData were collected from a sample of tobacco retailers in Alameda and San Francisco Counties at two time points: 2015, before flavored tobacco policies were enacted, and in 2019-2020, after some cities had enacted policies. Retailers were separated by city into Category 1 (n = 442)-retailers in cities that enacted a flavored tobacco policy between the two data collection periods, and Category 2 (n = 89), those that had not. Means comparison tests were conducted to evaluate significant differences over time and by category.ResultsThere was significantly reduced availability of menthol cigarettes, flavored little cigars, smokeless tobacco, vape pens, and Blu brand menthol e-cigarettes between 2015 and 2020 in Category 1 retailers. Category 2 retailers had reduced availability only for Blu menthol e-cigarettes and demonstrated an increase in smokeless tobacco availability. Exterior store advertising for cigarettes, little cigars, cigars, and e-cigarettes also decreased significantly in Category 1 cities relative to Category 2 cities; 8.1% of Category 1 stores were advertising flavored tobacco products in 2019-2020 compared to 36.2% of Category 2 stores. There was also a 78% reduction in flavored ads between 2015-2019 in Category 1 cities compared to a 38% decrease in Category 2 cities. Tobacco advertising inside Category 2 stores increased. Finally, Category 2 cities had significantly greater availability of cigalikes, mod or tank vapes, flavored e-cigarettes, and e-liquids compared to Category 1 cities.ConclusionsComprehensive flavored sales restriction policies reduce flavored tobacco availability and tobacco advertising, which may help prevent youth tobacco initiation and exposure.
| S-EPMC8953832 | biostudies-literature
Project description:Introduction:Flavors can mask the harshness of tobacco and make it appealing to young people. This study assessed flavored and menthol tobacco product sales at the national and state levels. Methods:Universal Product Code tobacco sales data collected by Nielsen were combined for convenience stores and all-outlets-combined during October 22, 2011-January 9, 2016. Products were characterized as flavored, menthol, or non-flavored/non-menthol. Total unit sales, and the proportion of flavored and menthol unit sales, were assessed nationally and by state for seven tobacco products. Joinpoint regression was used to assess trends in average monthly percentage change. Results:Nationally, the proportion of flavored and menthol sales in 2015 was as follows: cigarettes (32.5% menthol), large cigars (26.1% flavored), cigarillos (47.5% flavored, 0.2% menthol), little cigars (21.8% flavored, 19.4% menthol), chewing tobacco (1.4% flavored, 0.7% menthol), moist snuff (3.0% flavored, 57.0% menthol), and snus (88.5% menthol). From 2011 to 2015, sales increased for flavored cigarillos and chewing tobacco, as well as for menthol cigarettes, little cigars, moist snuff, and snus. Sales decreased for flavored large cigars, moist snuff, and snus, and for menthol chewing tobacco. State-level variations were observed by product; for example, flavored little cigar sales ranged from 4.4% (Maine) to 69.3% (Utah) and flavored cigarillo sales ranged from 26.6% (Maine) to 63.0% (Maryland). Conclusions:Menthol and flavored sales have increased since 2011, particularly for the products with the highest number of units sold, and significant state variation exists. Efforts to restrict flavored tobacco product sales could reduce overall U.S. tobacco consumption. Implications:Flavors in tobacco products can mask the harshness of tobacco and make these products more appealing to young people. This is the first study to assess national and state-level trends in flavored and menthol tobacco product sales. These findings underscore the importance of population-based interventions to address flavored tobacco product use at the national, state, and local levels. Additionally, further monitoring of flavored and menthol tobacco product sales can inform potential future regulatory efforts at the national, state, and local levels.
| S-EPMC5711620 | biostudies-literature
Project description:ImportanceMore than one-quarter of US residents live in states or localities that restrict sales of flavored electronic nicotine delivery systems (ENDS), often as a means to reduce youth vaping. Yet, how these policies affect young adult vaping and smoking remains unclear.ObjectiveTo estimate the effects of ENDS flavor restrictions on ENDS use and cigarette smoking among young adults (age 18-29 years) in the US.Design, participants, and settingThis quasi-experimental analysis used annual survey data from the 2016 to 2023 Behavioral Risk Factor Surveillance System (BRFSS), a series of nationally- and state-representative, repeated cross-sectional surveys of noninstitutionalized civilian adults in the US. Two-way fixed-effects specifications were estimated to assess how ENDS flavor restrictions affect young adults' use of ENDS and cigarettes. Analyses were adjusted for potential confounders including concurrent tobacco control policies, respondent demographic characteristics, and socioeconomic factors. Data analyses were conducted in November 2023 and repeated in October 2024 to incorporate newly released 2023 survey data.Main outcomes and measuresCurrent and daily use of ENDS and of cigarettes as measured in the BRFSS.ResultsBalanced panel analyses of 242 154 individuals aged 18 to 29 years consistently found that state ENDS flavor restrictions were associated with statistically significant reductions in daily vaping and increases in daily cigarette smoking. Estimates were similar across robustness checks, with the main specification showing 3.6 (95% CI, -5.0 to -2.1) percentage point (ppt) reductions in daily vaping and 2.2 ppt increases in daily cigarette smoking (95% CI, 1.0 to 3.4) relative to changes in states without restrictions. These estimates are equivalent to an 80% reduction in daily vaping and 22% increase in daily smoking compared with 2018 mean rates.Conclusions and relevanceThe findings of this quasi-experimental analysis of BRFSS survey data indicate that state restrictions on flavored ENDS sales were associated with reduced vaping among young adults but may have unintentionally increased cigarette smoking, potentially offsetting public health gains. These findings suggest that alleviating the burden of tobacco-related disease will require regulatory strategies that balance reducing vaping with preventing increases in more lethal, combustible tobacco use.
| S-EPMC11681375 | biostudies-literature
Project description:BackgroundIn June 2018, San Francisco voters upheld the first comprehensive prohibition on sales of flavoured tobacco products (all products including menthol, everywhere in the city with no exceptions).MethodsThis paper used data collected by the San Francisco Department of Public Health as part of its implementation and enforcement of San Francisco's city-wide ban on the sale of flavoured tobacco products. Every licensed tobacco retailer was visited and inspected. The San Francisco Department of Public Health and volunteers conducted an educational campaign from September 2018 to December 2018, including emailing all licensed tobacco retailers about the law, mailing a fact sheet poster, conducting four listening sessions and visiting permitted tobacco retailers to educate them about the law and solicit questions.ResultsCompliance inspections started in December 2018, which found that compliance was 17%. Compliance increased in January 2019 and averaged 80% between January 2019 and December 2019. After the phase-in period, all retailers were visited as part of routine inspections. This effort resulted in 80% compliance.ConclusionIncluding retailer education prior to enforcement can result in compliance with a comprehensive ban on the sale of menthol and other flavoured tobacco products.
| S-EPMC7572429 | biostudies-literature
Project description:IntroductionFlavored electronic nicotine delivery systems (ENDS) and tobacco products are associated with the initiation and progression of tobacco use. With recent restrictions around flavored products, it is critical to measure both the product and the flavor being used. The Tobacco Centers of Regulatory Science (TCORS) Flavored Tobacco Products Measurement Subcommittee (FTPMS) was established to develop core measures to assess flavored tobacco and ENDS product usage, facilitate data harmonization, replicability, and comparisons across studies.Aims and methodsThe FTPMS used a mixed-method approach to inform the development of recommended measures (first use, current use, reasons for use) to assess tobacco and ENDS product flavors. This included reviewing existing surveys, identifying priority areas, developing new measures, cognitive testing, and finalization of recommended measures.ResultsRecommended measures were selected from national surveys (e.g. PATH study) and survey items used in TCORS studies to evaluate first use, current use, and reasons for use of tobacco and ENDS products. Response options were expanded for questions about specific flavors and adapted to allow for assessments relevant to recent federal policies. Supplemental measures were developed for researchers conducting more in-depth research around flavored products.ConclusionsUsing an expert consensus process supplemented with cognitive testing, the FTPMS developed recommendations for core and supplemental measures for flavored tobacco and ENDS products. Harmonizing data on these factors for flavored tobacco and ENDS products are critical for researchers and may provide actionable evidence to federal, state, and local regulators and policymakers, as well as support evaluations of policies restricting flavors in these products.ImplicationsThe development of core measures to assess first use, current use, and reasons for use of flavored tobacco and ENDS products will facilitate data harmonization, replicability, and comparisons across studies conducted in different samples or across communities with varying levels of regulation for these products. Use of these standardized measures will allow for a greater understanding of the role of flavors and helps to build a more robust evidence base to inform regulatory decisions to reduce tobacco and ENDS use at the population level.
| S-EPMC9717360 | biostudies-literature
Project description:The HIV-1 epidemic in the US has historically been dominated by subtype B. HIV subtype diversity has not been extensively examined in most US cities to determine whether non-B variants have become established, as has been observed in many other global regions. We describe the diversity of non-B variants and present evidence of local transmission of non-B HIV in San Francisco. Viral sequences collected from patients between 2000 and 2016 were matched to the San Francisco HIV/AIDS case registry. HIV subtype was determined using COMET. Phylogenies were reconstructed using the pol region of subtypes A, C, D, G, CRF01_AE, CRF02_AG, and CRF07_BC, with reference sequences from the LANL HIV database. Associations of non-B subtypes and circulating recombinant forms (CRFs) with patient characteristics were assessed using multivariable logistic regression. Out of 11,381 sequences, 10,669 were from 7235 registry cases, of which 141 (2%) had non-B subtypes and CRFs and 72 (1%) had unique recombinant forms. CRF01_AE (0.8%) and subtype C (0.5%) were the most prevalent non-B forms. The frequency of non-B subtypes and CRFs increased in San Francisco during years 2000-2016. Out of 146 transmission events involving non-B study sequences, 18% indicated local transmission within the study population and 74% appeared to be inward migration of the virus. Compared to 7016 cases with only subtype B, 141 cases with non-B sequences were more likely to be of non-US country of birth (aOR = 11.02; p < 0.001), of Asian/Pacific-Islander race/ethnicity (aOR = 3.17; p < 0.001), and diagnosed after 2009 (aOR = 4.81; p < 0.001). Results suggest that most non-B infections were likely acquired outside the US and that local transmission of non-B forms has occurred but so far has not produced extensive transmission networks. Thus, non-B variants were not widely established in San Francisco, an observation that differs from cities worldwide with more diverse epidemics.
| S-EPMC10686190 | biostudies-literature
Project description:Supplemental material is available for this article. Keywords: Informatics, MR Diffusion Tensor Imaging, MR Perfusion, MR Imaging, Neuro-Oncology, CNS, Brain/Brain Stem, Oncology, Radiogenomics, Radiology-Pathology Integration © RSNA, 2022.
| S-EPMC9748624 | biostudies-literature
Project description:Organisation EGAO00000001152
| EGAO00000001152 | EGA