Effect of a two-phase tobacco control regulation on incidence from ischemic stroke and hemorrhagic stroke, Shenzhen, China, 2007-2016.

INTRODUCTION: The Shenzhen government is widely considered to be most efficiently implementing smoke-free legislation in China. We evaluated and compared the impact of Shenzhen's two-phase smoke-free regulation on the incidence rates for ischemic and hemorrhagic stroke. METHODS: An interrupted time series design was used to capture immediate and annual incidence changes from 2007 to 2016 for both ischemic and hemorrhagic stroke due to two-phase smoke-free regulation in Shenzhen, China, by using a generalized additive model. The first phase, implemented on 9 March 2010, required five main public places to be smoke-free. In the second phase, the comprehensive law was expanded to the whole city on 1 March 2014. RESULTS: The regulation implementation during phase I was associated with a strong immediate decline in the incidence rate of ischemic stroke (-14.2%, 95% CI: -19.6 - -8.4) and hemorrhagic stroke (-10.1%, 95% CI: -18.2 - -1.2), but without showing the annual changes (p>0.05). Following the implementation of the comprehensive law, the gradual annual effect showed a significant change in ischemic stroke, with a 6.3% (95% CI: 8.9 - -3.6) reduction. Neither the immediate nor gradual decreases in hemorrhagic stroke incidences associated with the comprehensive regulation were statistically significant during phase II (p>0.05). Subgroup analyses indicate that a much larger health effect of the regulation during phase I was greater among those aged ≥65 years than among those aged 35-64 years. CONCLUSIONS: Shenzhen's two-phase smoke-free regulation was well implemented. Even though the regulation did not extend to the whole city, the immediate health benefits on the incidence rates of ischemic stroke and hemorrhagic stroke could be seen. However, the health benefits brought by the implementation of comprehensive smoke-free legislation were attenuated by previous smoke-free regulations in five main public places, which were more evident in hemorrhagic stroke.

Impact of Smoke-Free Legislation on Acute Myocardial Infarction and Subtypes of Stroke Incidence in Shenzhen, China, 2012-2016: An Interrupted Time Series Analysis.

Objective: This study assesses the impact of smoke-free legislation on the incidence rate for acute myocardial infarction (AMI) and stroke in Shenzhen. Methods: Data on ischemic ( n = 72,945) and hemorrhagic ( n = 18,659) stroke and AMI ( n = 17,431) incidence covering about 12 million people in Shenzhen from 2012 to 2016 were used. Immediate and gradual changes in incidence rates were analyzed using segmented Poisson regression. Results: Following the smoke-free legislation, a 9% (95% CI: 3%-15%) immediate reduction was observed in AMI incidence, especially in men (8%, 95% CI: 1%-14%) and in those aged 65 years and older (17%, 95% CI: 9%-25%). The gradual annual benefits were observed only in hemorrhagic and ischemic stroke incidence, with a 7% (95% CI: 2%-11%) and 6% (95% CI: 4%-8%) decrease per year, respectively. This health effect extended gradually to the 50-64 age group. In addition, neither the immediate nor gradual decrease in stroke and AMI incidence rates did not show statistical significance among the 35-49 age group ( P > 0.05). Conclusion: Smoke-free legislation was enforced well in Shenzhen, which would generate good experiences for other cities to enact and enforce smoke-free laws. This study also provided more evidence of the health benefits of smoke-free laws on stroke and AMI.

Associations between e-cigarette policies and adolescent use and access to e-cigarettes.

Background: Tobacco control policies have been adapted to address rising levels of adolescent e-cigarette use. Despite new restrictions, adolescents are continuing to access e-cigarettes. Methods: We linked 2015-2019 Youth Risk Behavior Survey data on 503,154 14-18-year-olds from 40 states with state-level e-cigarette minimum legal sales age (MLSA) laws, taxes, and smoke-free legislation. Using two-way fixed effects probit regression models, we first examined the associations between these statewide e-cigarette policies and adolescent use and, second, with access to e-cigarettes. We subsequently tested interactions between age and each policy and present average marginal effects as percentage point (pp) changes. Results: While MLSA laws for e-cigarettes were associated with slight increases in e-cigarette use (2.72 pp; 1.29, 4.15), associations were no longer significant after at least 1-year post-implementation. MLSA laws were also associated with decreases in e-cigarette purchases in stores (-9.50 pp; -18.21, -0.79) and increases in acquiring them from someone else (13.26 pp; 4.10, 22.42), particularly among 18-year-olds. E-cigarette taxes were associated with decreases in use (-9.18 pp; -11.63, -6.73), but there were limited associations with e-cigarette access. While smoke-free legislation prohibiting e-cigarettes was associated with slight increases in use (1.87 pp; 0.23, 3.50), after at least 1-year post-implementation, they were associated with decreases in use. Smoke-free legislation was also associated with decreases in purchases in stores by 14-year-olds, but increases in online purchases by 18-year-olds. Conclusion: Understanding the immediate and longer-term consequences of e-cigarette policies is essential to influence adolescent e-cigarette use. Adolescents will continue acquiring e-cigarettes across varying sources if measures are not taken to address access alongside policies aimed at reducing use.

Impact of Smoke-Free Legislation on Acute Myocardial Infarction and Subtypes of Stroke Incidence in Shenzhen, China, 2012-2016: An Interrupted Time Series Analysis / 生物医学与环境科学（英文）

OBJECTIVE@#This study assesses the impact of smoke-free legislation on the incidence rate for acute myocardial infarction (AMI) and stroke in Shenzhen.@*METHODS@#Data on ischemic ( n = 72,945) and hemorrhagic ( n = 18,659) stroke and AMI ( n = 17,431) incidence covering about 12 million people in Shenzhen from 2012 to 2016 were used. Immediate and gradual changes in incidence rates were analyzed using segmented Poisson regression.@*RESULTS@#Following the smoke-free legislation, a 9% (95% CI: 3%-15%) immediate reduction was observed in AMI incidence, especially in men (8%, 95% CI: 1%-14%) and in those aged 65 years and older (17%, 95% CI: 9%-25%). The gradual annual benefits were observed only in hemorrhagic and ischemic stroke incidence, with a 7% (95% CI: 2%-11%) and 6% (95% CI: 4%-8%) decrease per year, respectively. This health effect extended gradually to the 50-64 age group. In addition, neither the immediate nor gradual decrease in stroke and AMI incidence rates did not show statistical significance among the 35-49 age group ( P > 0.05).@*CONCLUSION@#Smoke-free legislation was enforced well in Shenzhen, which would generate good experiences for other cities to enact and enforce smoke-free laws. This study also provided more evidence of the health benefits of smoke-free laws on stroke and AMI.

COTPA implementation status: An observational study in South Indian city.

Background & objectives: The World Health Organization (WHO) document released on the World No Tobacco Day, 2020, mentions that tobacco kills over 22,000 people worldwide every day either from its use or second-hand smoke exposure, which is one person every 4 sec. In 2003, the Cigarettes and Other Tobacco Products Act (COTPA) was enacted by the Indian government to control/regulate use of tobacco and tobacco products. Despite various amendments to this law, there has not been any appreciable decrease in tobacco use. The objective of this study was to assess the compliance level with sections 4-10 of COTPA in urban Puducherry in South India. Methods: Random sample survey of 13 wards was carried out in selected parts of the city of Puducherry. The estimated sample size was minimum 160 public places and point of sales (PoS) each. A pre-tested checklist was used to obtain information on compliance with COTPA. Statistical and spatial analysis was performed using STATA v12.0 and QGIS v2.14.21, respectively. Results: Eight per cent of public places, 0 per cent of PoS, 1.7 per cent of educational institutions and 48 per cent of tobacco packages were found compliant with COTPA specifications. The compliance in public places varied from 0 (bus stops) to 55 per cent (religious places). Interpretation & conclusions: The overall compliance with COTPA was found to be very low in urban Puducherry. In order to ensure proper implementation of the laws, effective enforcement with periodic monitoring of various sections of COTPA are needed.

Night entertainment venues comply poorly with the smoke-free law in Chile / Los locales de entretenimiento nocturno cumplen mal la Ley de ambientes libres de humo en Chile

The initial high level of compliance with the Chilean comprehensive national smoke-free law in 2013 is fading, particularly in the hospitality sector. This paper draws attention to how using a simple and low-cost surveillance inquiry may help focus on the use of scarce inspection resources to improve compliance with the law in the hospitality sector. We conducted a cross-sectional assessment of second-hand smoke exposure in night entertainment venues in Santiago, Chile, by measuring particulate matter of less than 2.5 µm (PM2.5). Smoking where prohibited by law was observed in 36% of the venues visited. Venues where smoking was spotted at the time of the observation had a median PM2.5 concentration 13 times higher than background concentration on the street. The study shows that a targeted approach for inspection to find pockets of venues with suboptimal compliance is feasible and affordable. (AU)

El alto nivel inicial de cumplimiento de la Ley integral chilena de ambientes libres de humo de 2013 se está desvaneciendo, particularmente en el sector de la restauración. Este documento muestra cómo una encuesta de vigilancia simple y económica puede ayudar a mejorar el uso de recursos de inspección escasos para mejorar el cumplimiento de la ley en dicho sector. Se realizó una evaluación transversal de la exposición al humo de tabaco ajeno en locales de entretenimiento nocturno en Santiago, Chile, midiendo el nivel de partículas menores de 2,5 µm (PM2.5). En el 36% de los locales visitados se fumaba donde lo prohíbe la ley. Los locales en los que se fumaba tenían una concentración mediana de PM2.5 13 veces mayor que la concentración en la calle. El estudio muestra que una vigilancia enfocada en la inspección de lugares con cumplimiento subóptimo es factible y asequible. (AU)

Changes in tobacco use patterns and motivation to quit related to the new smoke-free legislation in the Czech Republic.

BACKGROUND: Smoke-free policy belongs to key public health instruments to promote health in populations. In 2017, new comprehensive smoke-free law prohibiting smoking in indoor public places was implemented. We aimed to measure changes in tobacco smoking patterns and changes in motivation to quit in adult smokers prior to and after the new smoke-free legislation came into force. METHODS: We conducted a prospective cohort study prior to and post the implementation of Act No. 65/2017 Coll. Self-reported questionnaires were administered to 131 adult smokers by trained nurses in general practitioner offices in Prague. We analysed changes in cigarette consumption per day; ratio of cigarettes smoked in pub, street, work and home; and motivation to quit using regression modelling. RESULTS: We found a statistically significant decrease in the daily consumption of cigarettes (an average of 1.7 cigarettes per day, P < 0.001, d = 0.34). Smoking in indoor public spaces decreased to almost zero, while tobacco consumption in outdoor public spaces (such as streets and squares) increased by nearly 20%. We observed statistically significant increase of motivation to quit smoking (P = 0.021, d = 0.21). CONCLUSION: The study brings valuable indication of the desired public health impact related to key legislative change in the Czech Republic.

Night entertainment venues comply poorly with the smoke-free law in Chile.

The initial high level of compliance with the Chilean comprehensive national smoke-free law in 2013 is fading, particularly in the hospitality sector. This paper draws attention to how using a simple and low-cost surveillance inquiry may help focus on the use of scarce inspection resources to improve compliance with the law in the hospitality sector. We conducted a cross-sectional assessment of second-hand smoke exposure in night entertainment venues in Santiago, Chile, by measuring particulate matter of less than 2.5µm (PM2.5). Smoking where prohibited by law was observed in 36% of the venues visited. Venues where smoking was spotted at the time of the observation had a median PM2.5 concentration 13 times higher than background concentration on the street. The study shows that a targeted approach for inspection to find pockets of venues with suboptimal compliance is feasible and affordable.

Investigating the effects of comprehensive smoke-free legislation on neonatal and infant mortality in Thailand using the synthetic control method.

BACKGROUND: Almost all of the evidence on the benefits of smoke-free legislation on child health comes from evaluations in high-income countries. We investigated the effects of Thailand's 2010 comprehensive smoke-free legislation on neonatal and infant mortality. METHODS: To overcome some of the methodological issues inherent to traditional quasi-experimental methods, we applied the novel synthetic control approach. Using 2001-2017 country-level panel data from the World Bank and Penn World datasets, we estimated the effects of smoke-free legislation as the difference between the outcome trends in Thailand versus those in a synthetic control country. The synthetic control country was composed of 'control' middle-income countries without comprehensive smoke-free legislation to recreate trends in Thailand in the 2001-2009 pre-legislation outcomes and covariates. We compared the legislation effects to 'placebo effects' obtained for each control country by fictitiously assuming that comprehensive smoke-free legislation was introduced there in 2010, similar to Thailand. FINDINGS: Neonatal and infant mortality decreased by 2.9% and 2.8%/year respectively following smoke-free legislation, with an estimated 7463 infant deaths (including 4623 neonatal deaths) having been averted over eight years. The results were robust to different specifications of the control countries. Comparison with placebo effects indicated that the findings were unlikely to be attributable to factors other than the smoke-free legislation. INTERPRETATION: Expanding comprehensive smoke-free policies to middle-income countries can support national efforts to achieve Sustainable Development Goal 3.2 for reducing preventable early-life deaths. FUNDING: Netherlands Lung Foundation, HDRUK, Asthma UK center for Applied Research and NIHR Global Respiratory Health Unit (RESPIRE).

Evaluating the impact of the California 1995 smoke-free workplace law on population smoking prevalence using a synthetic control method.

The objective of this study is to assess the impact of the California 1995 Smoke-Free Workplace Act (SFWA) on cigarette smoking prevalence in the population. We used survey responses related to cigarette smoking from the Behavioral Risk Factor Surveillance System (BRFSS) from 1990 to 2000. We utilize a synthetic control method which creates a weighted combination of control states to produce a single 'synthetic' control group to best approximate the counterfactual trend in California in the absence of the SFWA. Variables known to be associated with smoking were included to weight each state in the pre-intervention period as medians by state and included: distribution of race/ethnicity (White, Black, Asian, Hispanic), sex (Male/Female), marital status (married/unmarried), high school education (yes/no) and employment status (yes/no). We find evidence that there was a small decrease in population smoking prevalence in California in the year immediately following the SFWA, but this effect was not sustained beyond 1995. We hypothesize that one potential explanation for the lack of prolonged impact on population smoking prevalence is that there are sustained effects from the passage of 1989 California Proposition 99, which enacted an excise tax on tobacco products. Understanding how workplace smoking ban legislation affects population smoking behaviors is necessary to better inform policy development in other states and counties and to improve existing policies. Future work should consider the impact of smoking legislation impacts subgroups of the population by socioeconomic status, occupation or race/ethnicity.

Qualitative examination of the perceived effects of a comprehensive smoke-free law according to neighborhood socioeconomic status in a large city.

Smoke-free legislations aim to protect non-smokers from second-hand smoke (SHS) exposure and improve population health outcomes. The aim of this study was to explore residents' perceptions to understand how people living in distinctive SES neighborhoods are differently affected by comprehensive smoke-free laws in a large city like Madrid, Spain. We conducted a qualitative project with 37 semi-structured interviews and 29 focus group discussions in three different SES neighborhoods within the city of Madrid. Constructivist grounded theory was used to analyze the transcripts. One core category arose in our analyses: Neighborhood inequalities in second-hand smoke (SHS) exposure in outdoor places. The enactment of the comprehensive smoke-free law resulted in unintended consequences that affected neighborhoods differently: relocation of smokers to outdoor setting, SHS exposure, noise disturbance and cigarette butt littering. Changes in the urban environment in the three neighborhoods resulted in the denormalization of smoking in outdoor public places, which was more clearly perceived in the high SES neighborhood. Changes in the built environment in outdoor areas of hospitality venues were reported to actually facilitate smoking. Comprehensive smoke-free laws resulted in denormalization of smoking, which might be effective in reducing SHS exposure. Extending smoking bans to outdoor areas like bus stops and hospitality venues is warranted and should include a public health inequalities perspective.

Inadequate Knowledge, Attitude and Practices about Second-Hand Smoke among Non-Smoking Pregnant Women in Urban Vietnam: The Need for Health Literacy Reinforcement.

The rate of exposure to second-hand smoke (SHS) is relatively high in several countries, including Vietnam, and health issues related to SHS have worsened in recent years, especially for pregnant women and their infants. Enhancement of knowledge, attitude, and practice (KAP) scores of pregnant women in Vietnam could raise practical interventions to protect their health and reduce complications of SHS. A cross-sectional study of 432 pregnant women who came to the Obstetrics Department of Bach Mai Hospital, Hanoi, Vietnam for antenatal care was conducted in 2016 to collect information about their KAP related to SHS. Composite mean scores from survey questions assessing their KAP were calculated on a 10-point scale, finding mean scores of 4.19, 7.45, and 4.30, respectively. Higher scores indicated better knowledge, attitude, and practice. Generalized linear models identified that age, occupation, living place, and sources of information were associated with SHS-related KAP. Findings from this study indicate that suitable programs related to SHS should be implemented to improve and reinforce health literacy to both mothers and smokers to reduce the harmfulness of smoking on women and their infants' health.

Impact of Qingdao's smoke-free legislation on hospitalizations and mortality from acute myocardial infarction and stroke: an interrupted time-series analysis.

BACKGROUND AND AIMS: More than 20 cities in China have enacted local smoke-free laws that prohibit smoking in public places. Only two of these cities have examined the health impact of the law. Enacted in 2013, Qingdao's smoke free-law was stricter than most other municipal smoke-free laws because it did not allow designated smoking rooms. This study aimed to estimate the impact of Qingdao's smoke-free legislation on acute myocardial infarction (AMI) and stroke. DESIGN, SETTING AND PARTICIPANTS: We used an interrupted time-series design adjusting for underlying secular trends, seasonal patterns and meteorological factors to estimate the impact of the smoke-free law on AMI and stroke events among permanent residents aged 35 years or older in Qingdao, China. The study period was from 1 January 2010 to 31 December 2015, with a post-ban follow-up of approximately 2.5 years. MEASUREMENT: Outcome measures were weekly numbers of hospitalizations and deaths due to AMI/stroke. FINDINGS: A total of 10 371 and 56 101 patients were hospitalized, with a principal discharge diagnosis of AMI and stroke, respectively; 32 196 AMI and 49 711 stroke deaths occurred during the study period. Following the smoke-free legislation, an incremental 20% [95% confidence interval (CI) = 14-26%] and 8% (95% CI = 3-13%) decrease per year was observed in AMI and stroke hospitalization rates, respectively. Neither the immediate nor gradual change in AMI nor stroke mortality rates associated with the law was statistically significant (P > 0.05). Post-hoc subgroup analyses indicated that statistically significant reductions in AMI hospitalizations were evident among both the 35-64 (18% per year, 95% CI = 12-27%) and 65-84 (20% per year, 95% CI = 12-27%) age groups. Statistically significant reductions in stroke hospitalization were only in the older subgroup (13% per year, 95% CI = 8-18%). CONCLUSIONS: The 2013 smoke-free legislation in Qingdao, China was associated with reduction in hospitalization from acute myocardial infarction and stroke among permanent residents aged 35 years or older. There was no statistically significant reduction in mortality from acute myocardial infarctions or stroke.

The downstream effects of state tobacco control policies on maternal smoking during pregnancy and birth outcomes.

BACKGROUND: Research has demonstrated that the implementation of tobacco control policies is associated with improved birth outcomes. Ascertainment of prenatal smoking on the US birth certificate has changed over the past decade to record smoking across each trimester. METHODS: Using 2005-2015 birth certificate data on 26,436,541 singletons from 47 states and DC linked to state-level cigarette taxes and smoke-free legislation, we conducted conditional mixed-process models to examine the impact of tobacco control policies on prenatal smoking and quitting, then on the associated changes in birth outcomes. We included interactions between race/ethnicity, education, and taxes and present average marginal effects. RESULTS: Among white and black mothers with less than a high school degree, 36.0% and 14.1%, respectively, smoked during the first trimester and their babies had the poorest birth outcomes. However, they were the most responsive to cigarette taxes. Every $1.00 increase in taxes was associated with a 3.45 percentage point decrease in prenatal smoking among white mothers and a 1.20 percentage point decrease among black mothers. These reductions translated to increases in birth weight by 4.19 g for babies born to white mothers and 0.89 g for babies born to black mothers. Among smokers, there was some evidence that taxes increased quitting and improved birth outcomes, although most associations were not statistically significant. We found limited effects of smoke-free legislation on smoking, quitting or birth outcomes. CONCLUSIONS: Cigarette taxes continue to have important downstream effects on reducing prenatal smoking and improving birth outcomes among the most vulnerable mothers and infants.

The effect of smoke-free legislation on the mortality rate of acute myocardial infarction: a meta-analysis.

BACKGROUND: Several studies have demonstrated that smoke-free legislation is associated with a reduced risk of mortality from acute myocardial infarction (AMI). This study aimed to examine and quantify the potential effect of smoke-free legislation on AMI mortality rate in different countries. METHODS: Studies were identified using a systematic search of the scientific literature from electronic databases, including PubMed, Web of Science, ScienceDirect, Embase, Google Scholar, and China National Knowledge Infrastructure (CNKI), from their inception through September 30, 2017. A random effects model was employed to estimate the overall effects of smoke-free legislation on the AMI mortality rate. Subgroup analysis was performed to explore the possible causes of heterogeneity in risk estimates based on sex and age. The results of meta-analysis after excluding the studies with a high risk of bias were reported in this study. RESULTS: A total of 10 eligible studies with 16 estimates of effect size were included in this meta-analysis. Significant heterogeneity in the risk estimates was identified (overall I2 = 94.6%, p < 0.001). Therefore, a random effects model was utilized to estimate the overall effect of smoke-free legislation. There was an 8% decline in AMI mortality after introducing smoke-free legislation (RR = 0.92, 95% confidence interval (CI): 0.90-0.94). The results of subgroup analyses showed that smoke-free legislation was significantly associated with lower rates of mortality for the following 5 diagnostic subgroups: smoke-free in workplaces, restaurants and bars (RR = 0.92, 95% CI: 0.90-0.95), smaller sample size (RR = 0.92, 95% CI: 0.89-0.95), study location in Europe (RR = 0.90, 95% CI: 0.85-0.94), regional study area (RR = 0.92, 95% CI: 0.89-0.94), and no previous local smoke-free legislation (RR = 0.91, 95% CI: 0.90-0.93). However, there was not much difference in AMI mortality rates after the legislation between the longer (RR = 0.92, 95% CI: 0.86-0.98) and shorter follow-up duration subgroups (RR = 0.92, 95% CI: 0.89-0.94). CONCLUSION: Smoke-free legislation could significantly reduce the AMI mortality rate by 8%. The reduction in the AMI mortality rate was more significant in studies with more comprehensive laws, without prior smoke-free bans, with a smaller sample size, at the regional level, and with a location in Europe.

Analysis of non-compliance with smoke-free legislation in Russia.

OBJECTIVES: The study examined the smokers' non-compliance rates in indoor public places in Russia and the sociodemographic factors associated with non-compliance. METHODS: Univariate analysis and logistic regression models were performed using cross-sectional data from a representative sample of Russian adults (N = 4006). RESULTS: 27.2% of Russian smokers did not comply with smoke-free bans. Non-compliance was attributed to sociodemographic characteristics of smokers, mainly to the number of cigarettes smoked per day, regular alcohol consumption, being aged between 15 and 34 years, being in the highest income group and living in an urban area. Neither the sex, nor the family status of smokers exerted a statistically significant affiliation with non-compliance. Higher rates of non-compliance were observed in restaurants, cafes, bars and nightclubs, common domestic premises of apartment buildings and indoor workplaces. Violations on public transport, in governmental buildings, health and sport facilities, colleges and universities were less common. CONCLUSIONS: There is a need to revise the methods of enforcement with respect to sociodemographic characteristics of smokers associated with non-compliance in public places where violations are widespread.

Impact of the Spanish smoking legislation among smokers: A longitudinal study with biomarkers in Barcelona (Spain).

BACKGROUND: The aim of this study is to assess the impact of the Spanish tobacco control legislation on smoking behavior and salivary cotinine concentration among smokers. METHODS: We used data from a longitudinal study, before (2004-2005) and after (2013-2014) the implementation of the two national smoking bans (in 2006 and 2011), in a representative sample of adults (≥16 years old) from Barcelona (Spain). We only analyzed a subsample of continuing smokers (n = 116). We conducted a survey on smoking behavior and obtained saliva sample for cotinine analyses. For this report, we analyzed a subsample of continuing smokers (n = 116). We calculated geometric means (GM). RESULTS: Among continuing smokers, salivary cotinine concentration significantly increased by 28.7% (GM from 91.7 ng/ml to 117.3 ng/ml, p = 0.015) after the implementation of the two Spanish smoke-free bans. Nonetheless, no pattern of change was observed in the self-reported number of cigarettes smoked daily. CONCLUSIONS: Our study shows a significant increase in the salivary cotinine concentration among adult continuing smokers after both Spanish legislations. This increase could be due to differences in smoking topography (increase in the depth of inhalation when smoking) along with changes in the type of tobacco smoked (increase in smoking roll-your-own cigarettes or mixed use of roll-your-own and manufactured cigarettes). Our results suggest the need to extend tobacco control policies, focusing on the reduction of use of any type of tobacco product and implementing better treatment to help smokers stop smoking.

Impact of public smoking bans on children's exposure to tobacco smoke at home: a systematic review and meta-analysis.

BACKROUND: Meta-analysis of the impact of public smoking bans on children's exposure to secondhand smoke (SHS) exposure at home. METHODS: The electronic databases of PubMed, Web of Science, PsycINFo, ASSIA, CINAHL were searched. German public health journals not captured by these databases and grey literature were considered in addition. Studies were included when they reported children's SHS exposure at home in relation to smoke-free legislation by measuring exposure before and after the introduction of a public smoking ban. Studies had to provide results on exposure prevalences of children aged below 18 years. Language of publications was restricted to German and English. Details of the included studies (n = 15) were extracted by one author and checked for accuracy by a second author. Given the exposure prevalences before and after the introduction of a smoke-free legislation, a random-effects meta-analysis of relative risks (RR) was conducted. Results were presented in a forest plot. RESULTS: Meta-analysis showed that the overall effect was a decreased exposure to SHS in the children's homes after introduction of a public smoking ban (RR = 0.72; 95% CI = 0.62-0.83). Only two of the 15 studies indicated an increased exposure. Sensitivity analyses considering the type of smoke-free legislation, children's age group and study quality did not substantially alter the result. CONCLUSION: The assumption of a displacement of smoking into homes with children due to smoke-free legislation in public places could not be confirmed. Additional research is needed to analyse long-term trends.

Impacts of smoke-free public places legislation on inequalities in youth smoking uptake: study protocol for a secondary analysis of UK survey data.

INTRODUCTION: Smoke-free public places legislation has been introduced in many countries to protect the public from the harmful effects of secondhand smoking. While evaluations of smoke-free policies have demonstrated major public health benefits, the impact on youth smoking and inequalities in smoking remains unclear. This project aims to evaluate how smoke-free public places legislation in the UK has impacted on inequalities in youth smoking uptake, and how much of any impact is via changes in parental smoking behaviour. METHODS AND ANALYSIS: The study will constitute secondary analyses of UK data (from the British Household Panel Survey and the Understanding Society study). Merging these datasets gives coverage of the period from 1994 to 2016. Missing data will be handled using multiple imputation. The primary outcomes are the rates and inequalities in initiation, experimentation, escalation to daily smoking and quitting among youths aged 11-15 years. Secondary outcomes include the prevalence of smoking among parents of these youths. Discrete-time event history analysis will be conducted to examine whether changes in the probability of youth smoking transitions are associated with the implementation of the smoke-free public places legislation; and whether any observed effects differ by socioeconomic position and parental smoking. A multilevel logistic regression model will be used to investigate whether there is a step change or change in trend for the prevalence of parental smoking after the policy was implemented. The models will be adjusted for relevant factors (including cigarette taxation, the change in the legal age for purchase of cigarettes and e-cigarette prevalence) that may be associated with the implementation of the legislation. ETHICS AND DISSEMINATION: This project will use anonymised survey data which have been collected following independent ethical review. The dissemination of the study findings will adopt multiple communication channels targeting both scientific and non-scientific audiences.

Smoking in public places in six European countries: Findings from the EUREST-PLUS ITC Europe Survey.

INTRODUCTION: Surveillance of tobacco consumption in public places is an important measure to evaluate the impact of tobacco control interventions over time. The objective of this study was to estimate the prevalence of smoking as seen by smokers and their smoking behaviour in public places, in six European countries. METHODS: We used baseline data of the International Tobacco Control Six European countries (ITC 6E) Survey, part of the EUREST-PLUS Project, conducted in 2016 in national representative samples of about 1000 adult smokers aged 18 years and older in Germany, Greece, Hungary, Poland, Romania and Spain. For each setting (workplaces, restaurants, bars/pubs and discos) participants were asked whether they had seen someone smoking during their last visit there and whether they too had smoked there. We report the overall and by-country weighted prevalence of seeing someone smoking and the smokers' own smoking behaviour at each setting. We also assess the relationship between seeing someone smoking and smoking themselves at these settings. RESULTS: The prevalence of smoking as seen by smokers was 18.8% at workplaces, with high variability among countries (from 4.7% in Hungary to 40.8% in Greece). Among smokers visiting leisure facilities in the last year, during their last visit 22.7% had seen someone smoking inside restaurants and 12.2% had smoked themselves there, while for bars/pubs the corresponding prevalences were 33.9% and 20.4%, and inside discos 44.8% and 34.8%. CONCLUSIONS: Smoking is still prevalent at leisure facilities, particularly at discos in Europe, with high variability among countries. More extensive awareness campaigns and stricter enforcement are needed to increase the compliance of smoke-free regulations, especially in leisure facilities.