Citation

Yong, H.H., Karmakar, C., Borland, R., Kusmakar, S., Fuller-Tyszkiewicz, M., Yearwood, J. (2020). Identifying smoker subgroups with high versus low smoking cessation attempt probability: A decision tree analysis approach. Nicotine and Tobacco Research, 103, 106258.

Abstract

Background: Regression-based research has successfully identified independent predictors of smoking cessation, both its initiation and maintenance. However, it is unclear how these various independent predictors interact with each other and conjointly influence smoking behaviour. As a proof-of-concept, this study used decision tree analysis (DTA) to identify the characteristics of smoker subgroups with high versus low smoking cessation initiation probability based on the conjoint effects of four predictor variables, and determine any variations by socio-economic status (SES).

Methods: Data come from the Australian arm of the ITC project, a longitudinal cohort study of adult smokers followed up approximately annually. Reported wanting to quit smoking, worries about smoking negative health impact, quitting self-efficacy and quit intentions assessed in 2005 were used as predictors and reported quit attempts at the 2006 follow-up survey were used as the outcome for the initial model calibration and validation analyses (n = 1475), and further cross-validated using the 2012-2013 data (n = 787).

Results: DTA revealed that while all four predictor variables conjointly contributed to the identification of subgroups with high versus low smoking cessation initiation probability, quit intention was the most important predictor common across all SES strata. The relative importance of the other predictors showed differences by SES.

Conclusions: Modifiable characteristics of smoker subgroups associated with making a quit attempt and any variations by SES can be successfully identified using a decision tree analysis approach, to provide insights as to who might benefit from targeted intervention, thus, underscoring the value of this approach to complement the conventional regression-based approach.

Citation

Sutanto, E., Miller, C., Smith, D.M., Borland, R., Hyland, A., Cummings, K.M., Quah, A.C.K., Xu, S.S., Fong, G.T., Ouimet, J., Yoshimi, I., Mochizuki, Y., Tabuchi, T., O’Connor, R.J., Goniewicz, M. (2020). Concurrent daily and non-daily use of heated tobacco products with combustible cigarettes: Findings from the 2018 ITC Japan Survey. International Journal of Environmental Research and Public Health, 17(6), 2098

Abstract

Use of heated tobacco products (HTPs) among current smokers is becoming increasingly popular in Japan. This study aims to compare characteristics and tobacco-related behaviors among concurrent users of HTPs and combustible cigarettes (n = 644) with exclusive smokers (n = 3194) or exclusive HTP users (n = 164). The secondary aim was to explore heterogeneity within concurrent use subgroups. Data were from Wave 1 of the ITC Japan Survey, a nationally representative web survey conducted from February to March 2018. Concurrent cigarette-HTP users were younger and wealthier than exclusive smokers. However, there were no difference in the frequency of smoking, number of cigarettes per day, and smoking cessation behaviors between the two groups, suggesting that HTPs reinforce nicotine dependence. Compared to exclusive HTP users, concurrent cigarette-HTP users reported higher frequency of non-daily HTP use, and lower number of tobacco-containing inserts per day. Almost all concurrent cigarette-HTP users smoked every day (93.9%); 48.4% both smoked and used HTPs daily (dual daily users, n = 396), while 45.5% were daily smokers and non-daily HTP users (predominant smokers, n = 213). Concurrent user subgroups differed from each other on age, tobacco use behaviors, and quit intention. Alongside heterogeneity between concurrent and exclusive product users, differences across concurrent use subgroups highlight the importance of considering frequency of use in characterizing poly-tobacco users.

Citation

Nargis, N., Hussain, A.K.M.G., Goodchild, M., Quah, A.C.K., Fong, G.T. (2020). Tobacco Industry Pricing Undermines Tobacco Tax Policy: A Tale from Bangladesh. Preventive medicine, 132, 105991. doi: 10.1016/j.ypmed.2020.105991.

Abstract

The effectiveness of tax increase in reducing tobacco use depends on the extent to which the industry passes on the tax to consumers. Evidence suggests that tobacco industry may absorb or raise the price more than the tax increase depending on the price segment of tobacco products. In this paper, we examined the industry's pricing strategy by price segment of the cigarette market in Bangladesh by observing the deviation between the market retail prices (MRP) of cigarettes faced by consumers and government recommended retail prices (RRP) used as tax base in a four-tiered ad valorem tax structure. The RRPs by brands were collected from government sources. The MRPs by brands were collected by the International Tobacco Control Bangladesh Wave 3 Survey 2011-12 and Wave 4 Survey 2014-15. Applying linear regression to the deviation of MRP from RRP by price tiers, we found MRPs were higher than RRPs for higher-price brands allowing extra profit margin from the high end while lowering the relative price of and expanding demand for cheaper brands. Bangladesh cigarette industry adopted a differential pricing strategy that undermined the intended effect of tax policy change in reducing cigarette consumption and improving public health. This pricing strategy was supported by the tiered excise tax structure which should be replaced with a uniform specific excise system. In the face of growing cigarette affordability, it is crucial that the specific tax be increased routinely by an amount that induces cigarette price increases large enough to make cigarettes less affordable over time.

Citation

Thompson, M.E., Driezen, P., Boudreau, C., Bécuwe, N., Agar, T.K., Quah, A.C.K., Zatoński, W.A., Przewoźniak, K., Mons, U., Demjén, T., Tountas, Y., Trofor, A.C., Fernández, E., McNeill, A., Willemsen, M.C., Vardavas, C.I., Fong, G.T. (2020). Methods of the International Tobacco Control (ITC) EURESTPLUS ITC Europe Surveys. European Journal of Public Health, 30(Suppl_3), iii4-iii9.

Abstract

Background: The EUREST-PLUS ITC Europe surveys aim to evaluate the impact of the European Union’s Tobacco Products Directive (EU TPD) implementation within the context of the WHO FCTC. This article describes the methodology of the 2016 (Wave 1) and 2018 (Wave 2) International Tobacco Control 6 European (6E) Country Survey in Germany, Greece, Hungary, Poland, Romania and Spain; the England arm of the 2016 (Wave 1) and 2018 (Wave 2) ITC 4 Country Smoking and Vaping (4CV) Survey; and the 2016 (Wave 10) and 2017 (Wave 11) ITC Netherlands (NL) Survey. All three ITC surveys covering a total of eight countries are prospective cohort studies with nationally representative samples of smokers.

Methods: In the three surveys across the eight countries, the recruited respondents were cigarette smokers who smoked at least monthly, and were aged 18 and older. At each survey wave, eligible cohort members from the previous waves were retained, regardless of smoking status, and dropouts were replaced by a replenishment sample.

Results: Retention rates between the two waves of the ITC 6E Survey by country were 70.5% for Germany, 41.3% for Greece, 35.7% for Hungary, 45.6% for Poland, 54.4% for Romania and 71.3% for Spain. The retention rate for England between ITC 4CV1 and ITC 4CV2 was 39.1%; the retention rates for the ITC Netherlands Survey were 76.6% at Wave 10 (2016) and 80.9% at Wave 11 (2017).

Conclusion: The ITC sampling design and data collection methods in these three ITC surveys allow analyses to examine prospectively the impact of policy environment changes on the use of cigarettes and other tobacco products in each country, to make comparisons across the eight countries.

Citation

Smith, T., Wahlquist, A.E., Heckman, B.W., Cummings, K.M., Carpenter, M.J. (2020). Impact of e-cigarette sampling on cigarette dependence and reinforcement value. Nicotine and Tobacco Research, 22(2), 297-301. doi: 10.1093/ntr/nty258

Abstract

Introduction: E-cigarettes have risen in prevalence in recent years, and most public health experts agree they deliver fewer toxicants than combustible tobacco products such as cigarettes. Thus, it is important to understand how use of e-cigarettes by current smokers impacts dependence on combustible cigarettes.

Methods: The present study is a secondary analysis of a randomized pilot trial of e-cigarette sampling. Nontreatment seeking current smokers were randomized in a 2:1 ratio to either receive or not receive a weekly supply of e-cigarettes for 3 weeks. Participants completed the Brief Wisconsin Inventory of Smoking Dependence Motives (WISDM) scale and the cigarette purchase task before and after the sampling period and at monthly follow-up visits for 3 months.

Results: Individuals assigned to receive an e-cigarette had significantly lower mean WISDM scores at the end of sampling and the end of the follow-up period compared with those in the control group. Both frequency of e-cigarette use as well as nicotine concentration of the e-cigarette given to smokers were significant predictors of changes in the mean WISDM score. E-cigarette sampling significantly reduced the demand parameter Omax, which measures the maximum amount of money participants estimate they would spend on cigarettes in a single day.

Conclusions: These data suggest that current smokers who try using an e-cigarette may experience reductions in dependence on combustible cigarettes.

Implications: The present analysis suggests that providing an e-cigarette to current cigarette smokers is likely to reduce cigarette dependence, especially if the e-cigarette delivers sufficient nicotine and is used frequently.

Citation

Chung-Hall, J., Fong, G.T., Meng, G., Yan, M., Tabuchi, T., Yoshimi, I., Mochizuki, Y., Craig, L., Ouimet, J., Quah, A.C.K. (2020). Effectiveness of Text-only Cigarette Health Warnings in Japan: Findings from the 2018 International Tobacco Control (ITC) Japan Survey. International Journal of Environmental Research and Public Health, 17(13), 952. Doi: https://doi.org/10.3390/ijerph17030952.

Abstract

Health warnings are an effective strategy for communicating the health harms of smoking, encouraging quitting, and preventing smoking initiation. This study examines the effectiveness of existing text-only health warnings, identifies key predictors of warning effectiveness, and assesses support for pictorial warnings in Japan. Data are from the 2018 International Tobacco Control (ITC) Japan Survey, a cohort survey of adult cigarette smokers (n = 3306), dual users of cigarettes and heated tobacco products (n = 555), and non-cigarette smokers (n = 823). Weighted multivariable logistic regression models were used to assess predictors of warning effectiveness and support for pictorial warnings. Overall, 15.6% of respondents noticed warnings, and 7.9% read or looked closely at warnings. Overall, 10.3% of smokers and dual users said the warnings stopped them from having a cigarette, and 7.2% avoided warnings. Overall, 27.5% of respondents said the warnings made them think about health risks of smoking, but only 2.7% of smokers and dual users said the warnings made them more likely to quit. Overall, 57.6% of respondents supported pictorial warnings. The weak effectiveness of Japan’s text-only warnings is consistent with that in other countries with similar warnings. There is majority support for pictorial warnings in Japan, although the level of support is lower than in other countries.

Citation

Sansone, G., Fong, G.T., Meng, G., Craig, L., Xu, S.S., Quah, A.C.K., Ouimet, J., Mochizuki, Y., Yoshimi, I., Tabuchi, T. (2020). Secondhand smoke exposure in public places and support for smoke-freelaws in Japan: Findings from the 2018 ITC Japan Survey. International Journal of Environmental Research and Public Health, 17(3), 979. Doi: https://doi.org/10.3390/ijerph17030979.

Abstract

Comprehensive smoke-free policies such as those called for by the WHO FCTC are the only way to protect the public effectively from the harms of secondhand smoke (SHS), yet Japan has been slow to implement this important health measure. This study examines baseline levels of smoking and SHS exposure in public places and support for smoking bans in Japan prior to the implementation of the 2018 national smoke-free law. Data are from the International Tobacco Control (ITC) Japan Wave 1 Survey (Feb–Mar 2018), a web survey of adult cigarette smokers, heated tobacco product users, dual users, and non-users (total N = 4684). Measures included prevalence of smoking (whether respondents noticed people smoking inside restaurants and bars at their last visit, and workplaces in the last month), and support for complete smoking bans in these venues. Smoking prevalence in each venue was high overall in 2018 (49% of workplaces, 55% of restaurants, and 83% of bars), even higher than in China, the country with the greatest toll of SHS. Support for complete smoking bans was very high overall (81% for workplaces, 78% for restaurants, and 65% for bars). Non-users were less likely to be exposed to SHS and had higher support for smoking bans than tobacco users. These findings point to the ineffectiveness of partial smoke-free laws in Japan and reinforce the call for comprehensive smoke-free laws, which even smokers would support at higher levels than in many other ITC countries.

Citation

van Mourik, D.J.A., Nagelhout, G.E., de Vries, H., van den Putte, B., Cummings, K.M., Borland, R., Fong, G.T., Willemsen, M.C. (2020). Quasi-experimentally examining the impact of introducing tobacco pictorial health warnings: Findings from the International Tobacco Control (ITC) 4C and Netherlands surveys in the Netherlands, Australia, Canada, United Kingdom, and the United States. Drug and Alcohol Dependence, 207, 107818.

Abstract

Background: Our study evaluated the short-term impact of introducing European Union’s tobacco pictorial health warnings (PHWs).

Methods: Longitudinal data were collected at two time-points from adult smokers, participating in the International Tobacco Control (ITC) surveys, conducted in the Netherlands, Australia, Canada, the United Kingdom and the United States. In the Netherlands, textual health warnings (THWs) were replaced by PHWs between both time-points. Health warning policies did not change in the other countries. Data from continuing smokers were used (N = 3,487) and analyzed using Generalized Estimating Equations.

Results: Between both time-points, only Dutch smokers showed increases in noticing health warnings (β = 0.712, p < 0.001), self-reports of health warnings leading to a cognitive response such as thinking about smoking health-risks (SHRs) (OR = 1.834, p < 0.001), knowledge about SHRs (β = 0.369, p < 0.001), and avoiding health warnings (OR = 9.869, p < 0.001). However, Dutch smokers showed no changes in attitude towards smoking (β = 0.035, p = 0.518), intention to quit smoking (OR = 0.791, p = 0.157), self-efficacy to quit smoking (β=-0.072, p = 0.286), or reporting that health warnings helped them to resist having a cigarette (OR = 1.091, p = 0.714).

Conclusions: Results suggest that introducing the European PHWs was effective in provoking changes closely related to health warnings, but there was no direct impact on variables more closely related to smoking cessation.

Citation

Czoli, C., White, C., Reid, J., O’Connor, R.J., Hammond, D. (2020). Awareness and interest in IQOS heated tobacco products among youth in Canada, England & the United States. Tobacco Control, 29(1), 89-95. doi:10.1136/tobaccocontrol-2018-054654

Abstract

Introduction: Heated tobacco products (HTPs), such as IQOS, have been introduced in a growing number of international markets. However, little is known about perceptions of HTP products among youth.

Methods: Data are from wave 1 of the International Tobacco Control Youth Tobacco and E-cigarette Survey (2017), a web-based cohort survey of people aged 16-19 years from Canada, England and the USA. Respondents (n=12 064) were shown an image of IQOS and asked about their awareness, interest in trying and susceptibility to trying the product. Youth awareness, interest in trying and susceptibility to trying IQOS were analysed using descriptive statistics, and logistic regression models were used to examine correlates of these outcomes.

Results: Overall, 7.0% of youth reported awareness of IQOS (England=5.6%, Canada=6.4% and USA=9.1%) and 38.6% expressed interest in trying the product (England=41.8%, Canada=33.0% and USA=40.9%). Within each country, all key outcomes varied by smoking status: greater proportions of youth who were currently smoking or had a history of smoking reported being aware of, interested in trying and susceptible to trying IQOS. Interest and susceptibility to trying IQOS were associated with male sex, current tobacco use and current e-cigarette use. Across all countries, susceptibility to trying IQOS (25.1%) was higher than for tobacco cigarettes (19.3%), but lower than for e-cigarettes (29.1%).

Conclusions: Awareness of HTPs, such as IQOS, is emerging among youth in Canada, England and the USA. Interest in trying these products is very high among smokers, but also present among non-smokers.

Citation

van Mourik, D.J.A., Nagelhout, G.E., de Vries, H., van den Putte, B., Cummings, K.M., Borland, R., Fong, G.T., Willemsen, M.C. (2020). Quasi-experimentally examining the impact of introducing tobacco pictorial health warnings: Findings from the International Tobacco Control (ITC) 4C and Netherlands surveys in the Netherlands, Australia, Canada, United Kingdom, and the United States. Drug and Alcohol Dependence, 207, 107818.

Abstract

Background: Tobacco control policies and other denormalization strategies may reduce tobacco use by stigmatizing smoking. This raises an important question: Does perceived smoking-related stigma contribute to a smoker's decision to quit? The aim of this study was to evaluate if perceived smoking-related stigma was associated with smoking cessation outcomes among smokers in Mexico and Uruguay.

Methods: We analyzed prospective data from a panel of adult smokers who participated in the 2008-2012 administrations of the International Tobacco Control Policy Evaluation Surveys in Mexico and Uruguay. We defined two analytic samples of participants: the quit behavior sample (n=3896 Mexico; n=1525 Uruguay) and the relapse sample (n=596 Mexico). Generalized estimating equations were used to evaluate if different aspects of perceived stigma (i.e., discomfort, marginalization, and negative stereotype) at baseline were associated with smoking cessation outcomes at follow-up.

Results: We found that perceived smoking-related stigma was associated with a higher likelihood of making a quit attempt in Uruguay, but with a lower likelihood of successful quitting in Mexico.

Conclusions: This study suggests that perceived smoking-related stigma may be associated with more quit attempts, but less successful quitting among smokers. It is possible that once stigma is internalized by smokers, it may function as a damaging force. Future studies should evaluate the influence of internalized stigma on smoking behavior.

Implications: While perceived smoking-related stigma may prompt smokers to quit smoking, smoking stigma may also serve as a damaging force for some individuals, making quitting more difficult. This study found that perceived smoking-related stigma was associated with a higher likelihood of making a quit attempt in Uruguay, but with a lower likelihood of successful quitting in Mexico.

Citation

Zhao, P., Ghosh, M., Rao, J.N.K., Wu, C. (2020). Bayesian empirical likelihood inference with complex survey data. Journal of the Royal Statistics Society, 82(1), 155-174.

Abstract

We propose a Bayesian empirical likelihood approach to survey data analysis on a vector of finite population parameters defined through estimating equations. Our method allows overidentified estimating equation systems and is applicable to both smooth and non‐differentiable estimating functions. Our proposed Bayesian estimator is design consistent for general sampling designs and the Bayesian credible intervals are calibrated in the sense of having asymptotically valid design‐based frequentist properties under single‐stage unequal probability sampling designs with small sampling fractions. Large sample properties of the Bayesian inference proposed are established for both non‐informative and informative priors under the design‐based framework. We also propose a Bayesian model selection procedure with complex survey data and show that it works for general sampling designs. An efficient Markov chain Monte Carlo procedure is described for the required computation of the posterior distribution for general vector parameters. Simulation studies and an application to a real survey data set are included to examine the finite sample performances of the methods proposed as well as the effect of different types of prior and different types of sampling design.

Citation

Smith, D.M., Miller, C., O’Connor, R.J., Kozlowski, L.T., Wadsworth, E., Fix, B.V., Collins, R.L., Wei, B., Goniewicz, M., Hyland, A., Hammond, D. (2021). Modes of delivery in concurrent nicotine and cannabis use ("co-use") among youth: Findings from the International Tobacco Control (ITC) Survey. Substance Abuse, 42(3), 339-347.

Abstract

Background: Cannabis use is more common among nicotine users than non-users. This study characterized concurrent use of nicotine and cannabis (co-use) among 12,064 youth aged 16-19 years residing in Canada, the United States, and England in 2017.

Methods: Data were from the ITC Youth Tobacco & Vaping Survey (Wave 1). Seven modes of cannabis delivery (MOD) were characterized by country of residence and past 30-day use of combusted tobacco and electronic cigarettes. Weighted multivariable regression models were fitted to assess the correlates of co-use and each cannabis MOD.

Results: Seventy percent of cannabis users reported nicotine use. Co-users exhibited behavioral and demographic differences compared to exclusive users of either substance. Smoking cannabis without tobacco was the most popular form of use (78%). Use of nicotine-containing e-cigarettes was associated with using an e-cigarette to vape cannabis oil/liquid (aOR: 4.96, 95%CI: 2.23-11.06). Combustible tobacco use was associated with smoking cannabis with tobacco in a joint/blunt (aOR: 2.93, 95%CI: 1.894.56). Country-level differences were detected.

Conclusions: Nicotine use is substantial among cannabis users, and associations exist between modes of delivery for both drugs. Results underscore the importance of studying cannabis and nicotine use concurrently, and the need to address the use of both substances in developing interventions for youth users

Citation

Driezen, P., Guindon, G.E., Hammond, D., Thompson, M.E., Quah, A.C.K., Fong, G.T. (2020). Contraband cigarette purchasing from First Nation Reserves in Ontario and Quebec: Findings from the 2002-2014 ITC Canada Survey. International Journal of Drug Policy, 75, 102612.

Abstract

Background: The availability of contraband cigarettes provides incentives for price-sensitive smokers to reduce their monetary costs of smoking. The objectives of this study were to examine whether Canadian smokers’ geographic proximity to First Nations reserves and attempts to quit smoking influenced the likelihood of purchasing lower-cost cigarettes from reserves.

Methods: Data were from the International Tobacco Control (ITC) Canada Survey, a prospective survey of Canadian adult smokers conducted from 2002 to 2014 using telephone and online interviewing methods. Analysis was restricted to smokers from Ontario (n=2105) and Quebec (n=1427) participating in at least one survey wave. Smokers’ postal codes were used to calculate distance to the nearest reserve. Weighted logistic generalised estimating equations (GEE) regression examined the linear relationship between distance and the log odds of last purchasing cigarettes on reserve in each province. GEE models also examined the relationship between past-year quit attempts and the log odds of on-reserve purchasing.

Results: Controlling for other factors, from 2002–2014, smokers from Ontario who lived 10 km closer to reserves than otherwise similar smokers had significantly higher odds of last purchasing on reserve (OR ranged from 1.16 to 1.65). Distance had little effect on smokers’ purchasing behaviours in Quebec. Moreover, in Ontario, for every 10 km increase in distance, smokers who did not try to quit had significantly greater odds of purchasing from a reserve than smokers who tried to quit (p=0.002).

Conclusion: In order for tobacco taxation policies to achieve their maximal benefit, governments must limit potential sources of lower-cost cigarettes. Collaborative governance arrangements can ensure tobacco products sold on reserve to non-Indigenous people are appropriately taxed while allowing First Nations communities to keep the revenue generated by such taxes.

Abstract

Background: Our study evaluated the short-term impact of introducing European Union’s tobacco pictorial health warnings (PHWs).

Methods: Longitudinal data were collected at two time-points from adult smokers, participating in the International Tobacco Control (ITC) surveys, conducted in the Netherlands, Australia, Canada, the United Kingdom and the United States. In the Netherlands, textual health warnings (THWs) were replaced by PHWs between both time-points. Health warning policies did not change in the other countries. Data from continuing smokers were used (N = 3,487) and analyzed using Generalized Estimating Equations.

Results: Between both time-points, only Dutch smokers showed increases in noticing health warnings (β = 0.712, p < 0.001), self-reports of health warnings leading to a cognitive response such as thinking about smoking health-risks (SHRs) (OR = 1.834, p < 0.001), knowledge about SHRs (β = 0.369, p < 0.001), and avoiding health warnings (OR = 9.869, p < 0.001). However, Dutch smokers showed no changes in attitude towards smoking (β = 0.035, p = 0.518), intention to quit smoking (OR = 0.791, p = 0.157), self-efficacy to quit smoking (β=-0.072, p = 0.286), or reporting that health warnings helped them to resist having a cigarette (OR = 1.091, p = 0.714).

Conclusions: Results suggest that introducing the European PHWs was effective in provoking changes closely related to health warnings, but there was no direct impact on variables more closely related to smoking cessation.

Citation

Sansone, G., Fong, G.T., Yan, M., Meng, G., Craig, L.V., Xu, S.S., Quah, A.C.K., Wu, C., Feng, G., Jiang, Y. (2019). Secondhand smoke exposure and support for smoke-free policies in cities and rural areas of China from 2009 to 2015: a population-based cohort study (the ITC China Survey). BMJ Open, 9, e031891.

Abstract

Objectives: To examine trends in smoking prevalence in key venues (workplaces, restaurants, bars) and in public support for comprehensive smoke-free laws, with comparisons between cities and rural areas in China.

Design: Data are from Waves 3–5 (2009–2015) of the International Tobacco Control (ITC) China Survey, a cohort survey of smokers and non-smokers. Logistic regression analyses employing generalised estimating equations assessed changes in smoking prevalence and support for smoke-free laws over time; specific tests assessed whether partial smoking bans implemented in three cities between Waves 3 and 4 had greater impact.

Setting: Face-to-face surveys were conducted in seven cities (Beijing, Changsha, Guangzhou, Kunming, Shanghai, Shenyang and Yinchuan) and five rural areas (Changzhi, Huzhou, Tongren, Yichun and Xining).

Participants: In each survey location at each wave, a representative sample of approximately 800 smokers and 200 non-smokers (aged 18+) were selected using a multistage cluster sampling design.

Main outcome measures: Prevalence of smoking (whether respondents noticed smoking inside restaurants, bars and workplaces); smoking rules inside these venues; and support for complete smoking bans in these venues.

Results: Although smoking prevalence decreased and support increased over time, neither trend was greater in cities that implemented partial smoke-free laws. Smoking was higher in rural than urban workplaces (62% vs 44%, p<0.01), but was equally high in all restaurants and bars. There were generally no differences in secondhand smoke (SHS) exposure between smokers and non-smokers except in rural workplaces (74% vs 58%, p<0.05). Support for comprehensive bans was equally high across locations.

Conclusions: Partial laws have had no effect on reducing SHS in China. There is an urgent need for comprehensive smoke-free laws to protect the public from exposure to deadly tobacco smoke in both urban and rural areas. The high support among Chinese smokers for such a law demonstrates that public support is not a barrier for action.

Citation

Li, L., Borland, R., O’Connor, R.J., Fong, G.T., McNeill, A., Driezen, P., Cummings, K.M. (2019). The association between smokers' self-reported health problems and quitting: Findings from ITC Four Country Smoking and Vaping Wave 1 Survey. Tobacco Prevention & Cessation, 5(December): 49.

Abstract

Introduction: This study aimed to systematically examine whether having health conditions or concerns related to smoking are associated with quitting activities among smokers across four western countries.

Methods: Data came from the 2016 International Tobacco Control Four Country Smoking and Vaping Survey conducted in Australia, Canada, England and US. We asked smokers and recent quitters (n=11838) whether they had a medical diagnosis for heart disease, cancer, chronic lung disease, depression, anxiety, alcohol problems, diabetes, severe obesity and chronic pain (nine conditions), and whether they believed smoking had harmed/would harm their health, along with questions on quitting activities.

Results: General concerns about smoking harming health and all specific health conditions, except for alcohol problems, were positively associated with quit attempts, but the relationships between health conditions and other quitting measures (being abstinent, planning to quit, use of quitting medications) were less consistent. Positive associations between conditions and use of quitting medications were only significant for depression, anxiety and chronic pain (adjusted odds ratios ranged from 1.4 to 1.5). There was a general tendency to report lower self-efficacy for quitting among those with the health conditions.

Conclusions: While those with smoking related conditions are somewhat more aware of the links to their smoking, and are largely taking more action, the extent of this is lower than one might reasonably expect. Enhanced awareness campaigns are needed and health professionals need to do more to use health conditions to motivate quit attempts and to ensure they are made with the most effective forms of help.

Citation

Sutanto, E., Smith, D.M., Miller, C., O’Connor, R.J., Hyland, A., Tabuchi, T., Quah, A.C.K., Cummings, K.M., Xu, S., Fong, G.T., Ouimet, J., Yoshimi, I., Mochizuki, Y., Goniewicz, M.L. (2019). Use of Heated Tobacco Products within Indoor Spaces: Findings from the 2018 ITC Japan Survey. International Journal of Environmental Research and Public Health, 16(23), 4862.

Abstract

Although heated tobacco products (HTPs) have become increasingly popular in Japan, little is known about whether these emerging tobacco products are being used within indoor public spaces. Nationally representative data were obtained prior to implementation of a comprehensive smoke-free law in Japan as part of Wave 1 of the International Tobacco Control Japan Survey (February–March 2018). We estimated the weighted prevalence of HTP use within indoor public spaces among tobacco users and compared these to estimates for combustible cigarettes (CCs). Overall, 15.6% of current tobacco users in Japan declared that they used HTPs within indoor public spaces. Any HTP use within indoor public spaces was significantly lower than any CC use (80.1% vs. 96.7%). Dual HTP + CC users reported using CCs more frequently than using HTPs within indoor public spaces (97.7% vs. 76.0%). In conclusion, HTP use is less common than CC use within indoor public spaces. Findings of this study can inform the development of targeted smoke-free policies to benefit public health.

Citation

Sutanto, E., Miller, C., Smith, D., O’Connor, R.J., Quah, A.C.K., Cummings, K.M., Xu, S., Fong, G.T., Hyland, A., Ouimet, J., Yoshimi, I., Mochizuki, Y., Tabuchi, T. Goniewicz, M. (2019). Prevalence, use behaviors, and preferences among users of heated tobacco products: Findings from the 2018 ITC Japan Survey. International Journal of Environmental Research and Public Health, 16(23), 4630.

Abstract

Heated tobacco products (HTPs), such as IQOS, glo, and Ploom TECH, with a variety of flavored tobacco-containing inserts, have reportedly achieved a significant market share in Japan. We analyzed data from Wave 1 of the ITC Japan Survey, a nationally representative web survey conducted in February to March 2018 among 4684 adult participants to estimate the prevalence of HTP use, describe characteristics of HTP users, and explore user preferences for HTP device and flavor. The overall prevalence of monthly HTP use was 2.7% (1.7% daily use). Virtually all HTP users were current cigarette smokers (67.8%) or former smokers (25.0%); only 1.0% of HTP users were never smokers. Among HTP users, IQOS was the most frequently reported brand used (64.5%), and menthol was the most common flavor reported (41.5%). IQOS was used more by younger respondents and those who reported daily use, while Ploom TECH was more popular among older respondents and non-daily HTP users. This is one of the first non-industry funded studies to explore the use of HTPs in Japan.

Citation

Hummel, K., van den Putte, B., Mons, U., Willemsen, M.C., Fong, G.T., Andler, R., de Vries, H., Nagelhout, G.E. (2019). The role of income and psychological distress in the relationship between job loss and smoking cessation: findings from three International Tobacco Control (ITC) Europe countries. Tobacco Prevention & Cessation, 5(November), 42.

Abstract

Introduction: The relationship between work loss and smoking has not been studied extensively, and underlying factors are often not examined. The aim of this study was to test two hypotheses. First, work loss is associated with greater intention to quit and more likelihood of smoking cessation, and this relationship is moderated by a decrease in income. Second, work loss is associated with lower quit intention and lower rates of smoking cessation, and this relationship is moderated by an increase in psychological distress.

Methods: We used pooled data from three countries participating in the ITC Project: France, Germany and the Netherlands (n=2712). We measured unemployment, income and psychological distress at two consecutive survey waves, and calculated changes between survey waves. We first conducted multiple logistic regression analyses to examine the association between work loss and smoking cessation behavior. Next, we added income decrease and psychological distress increase to the models. Finally, we added interaction terms of work loss by income decrease and work loss by distress increase to the model.

Results: Work loss was not associated with quit intention, quit attempts, and quit success. When income decrease and psychological distress increase were added to the model, we found a positive association between distress increase and quit attempts. The interactions, however, were not statistically significant.

Conclusions: Our results indicate that smokers who become unemployed and face a decrease in income are not less likely to quit smoking than smokers who are employed.

Citation

van Mourik, D.A., Candel, M.J.J.M., Nagelhout, G.E., Willemsen, M.C., Yong, H.H., van den Putte, B., Fong, G.T., de Vries, H. (2019). How the New European Union’s (Pictorial) Tobacco Health Warnings Influence Quit Attempts and Smoking Cessation: Findings from the 2016–2017 International Tobacco Control (ITC) Netherlands Surveys. International Journal of Environmental Research and Public Health, 16(21), 4260.

Abstract

In 2016, the Netherlands was required to introduce new European Union (EU)’s (pictorial) tobacco health warnings. Our objective was to describe the pathways through which the new EU tobacco health warnings may influence quit attempts and smoking cessation among Dutch smokers. Longitudinal data from 2016 and 2017 from the International Tobacco Control (ITC) Netherlands Survey were used. Smokers who participated in both surveys were included (N = 1017). Structural equation modeling was applied to examine the hypothesized pathways. Health warning salience was positively associated with more health worries (β = 0.301, p < 0.001) and a more positive attitude towards quitting (β = 0.180, p < 0.001), which, in turn, were associated with a stronger quit intention (health worries: β = 0.304, p < 0.001; attitude: β = 0.340, p < 0.001). Quit intention was a strong predictor of quit attempts (β = 0.336, p = 0.001). Health warning salience was also associated with stronger perceived social norms towards quitting (β = 0.166, p < 0.001), which directly predicted quit attempts (β = 0.141, p = 0.048). Quit attempts were positively associated with smoking cessation (β = 0.453, p = 0.043). Based on these findings, we posit that the effect of the EU’s tobacco health warnings on quit attempts and smoking cessation is mediated by increased health worries and a more positive attitude and perceived social norms towards quitting. Making tobacco health warnings more salient (e.g., by using plain packaging) may increase their potential to stimulate quitting among smokers.

Citation

King, B., Borland, R., Yong, H.H., Gartner, C., Hammond, D., Lewandowsky, S, O’Connor, R.J. (2019). Understanding of the component causes of harm from cigarette smoking in Australia. Drug and Alcohol Review, 38(7), 807-817.

Abstract

Introduction and aims: To investigate relationships between smoking-related behaviours and knowledge of the disease risks of smoking and the causes of smoking harms, using a four-way division of 'component causes': nicotine, other substances found in unburned tobacco, combustion products of tobacco and additives.

Design and methods: The data were collected using an on-line survey in Australia with 1047 participants in three groups; young non-smokers (18 to 25), young smokers (18 to 25) and older smokers (26 and above).

Results: Most participants agreed that cancer and heart disease are major risks of smoking but only a quarter accurately quantified the mortality risk of lifetime daily smoking. Very few (two of 1047) correctly estimated the relative contributions of all four component causes. Post-hoc analyses reinterpreting responses as expressions of relative concern about combustion products and nicotine showed that 29% of participants rated combustion products above nicotine. We delineated six relative concern segments, most of which had distinctive patterns of beliefs and actions. However, higher levels of concern about combustion products were only weakly positively associated with harm reducing beliefs and actions.

Discussion and conclusions: Most smokers do not appear to understand the risks of smoking and their causes well enough to be able to think systematically about the courses of action open to them to reduce their health risk. To facilitate informed decision-making, tobacco control communicators may need to better balance the dual aims of creating fear/negative affect about smoking and imparting knowledge about the health harms and their mechanisms.

Citation

Levy, D.T., Warner, K.E., Cummings, K.M., Hammond, D., Kuo, C., Fong, G.T., Thrasher, J.F., Goniewicz, M.L., Borland, R. (2019). Examining the relationship of vaping to smoking initiation among US youth and young adults: a reality check. Tobacco Control, 28(6), 629-635.

Abstract

Background: The 2018 National Academies of Sciences, Engineering, and Medicine Report found substantial evidence that electronic cigarette use (vaping) by youth is strongly associated with an increased risk of ever using cigarettes (smoking) and moderately associated with progressing to more established smoking. However, the Report also noted that recent increases in vaping have been associated with declining rates of youth smoking. This paper examines the temporal relationship between vaping and youth smoking using multiple data sets to explore the question of whether vaping promotes smoking initiation in the USA.

Methods: Using publicly available, nationally representative data on smoking and vaping among youth and young adults, we conducted a trend line analysis of deviations from long-term trends in smoking starting from when vaping became more prevalent.

Results: There was a substantial increase in youth vaping prevalence beginning in about 2014. Time trend analyses showed that the decline in past 30-day smoking prevalence accelerated by two to four times after 2014. Indicators of more established smoking rates, including the proportion of daily smokers among past 30-day smokers, also decreased more rapidly as vaping became more prevalent.

Conclusions: The inverse relationship between vaping and smoking was robust across different data sets for both youth and young adults and for current and more established smoking. While trying electronic cigarettes may causally increase smoking among some youth, the aggregate effect at the population level appears to be negligible given the reduction in smoking initiation during the period of vaping’s ascendance.

Citation

Fataar, F., Hammond, D. (2019). The prevalence of vaping and smoking as modes of delivery for nicotine and cannabis among youth in Canada, England and the United States. International Journal of Environmental Research and Public Health, 16(21), 4111. doi:10.3390/ijerph16214111

Abstract

Background: Vaping has become an increasingly common mode of administration for both nicotine and cannabis, with overlap among users, devices, as well as nicotine and cannabis companies. There is a need to understand patterns of use among youth, including the way nicotine and cannabis are administered.

Methods: Data are from Wave 2 of the ITC Youth Tobacco and Vaping survey, an online survey conducted in 2018 among 16-19 year-olds recruited from commercial panels in Canada (n = 3757), England (n = 3819), and the U.S. (n = 3961). The prevalence of past 30-day vaping nicotine, nonnicotine and cannabis substances, as well as cannabis modes of use was examined. Logistic regression models examined between country differences in prevalence.

Results: Past 30-day cannabis use was highest among Canadian youth (16.6%), followed by youth in the U.S. (13.8%) and England (9.0%). Vaping e-cigarettes was substantially more prevalent than vaping cannabis in all three countries. All forms of cannabis use were higher among Canadian and U.S. youth compared to England (p < 0.001 for all). Past 30-day cannabis users in the U.S. were more likely to report vaping cannabis oil (30.1%), and consuming solid concentrates such as wax and shatter (30.2%), compared to cannabis users in Canada (18.6% and 22.9%) and England (14.3% and 11.0%; p < 0.001 for all).

Conclusions: Youth are administering cannabis and nicotine using a wide diversity of modes. Cannabis users in the U.S.-where an increasing number of states have legalized medical and non-medical cannabis-reported notably higher use of more potent cannabis products, including cannabis oils and extracts.

Citation

Aleyan, S., East, K., McNeill, A., Cummings, K.M., Fong, G.T., Yong, H.H., Thrasher, J.F., Borland, R., Hitchman, S.C. (2019). Differences in norms towards the use of nicotine vaping products among adult smokers, former smokers and nicotine vaping product users: Cross-sectional findings from the 2016 ITC Four Country Smoking and Vaping Survey. Addiction, 114(Suppl 1), 97-106.

Abstract

Aims: To examine whether norms towards nicotine vaping product (NVP) use varied between Australia, Canada, England and the United States and by socio‐demographics, smoking and NVP status.

Design: Cross‐sectional data from the 2016 ITC Four Country Smoking and Vaping Survey.

Setting: Four countries with distinct regulatory policies relating to the sale and advertising of NVPs: Australia (most restrictive), Canada (restrictive), England and the United States (least restrictive).

Participants: A total of 10900 adult (age 18+) current smokers, former smokers, or at least weekly NVP users. Respondents were from Australia (n = 1366), Canada (n = 3309), England (n = 3835) and the United States (n = 2390).

Measurements: Questions permitted the categorization of respondents as current smokers, former smokers, NVP users and socio‐demographic categories (sex, age, country, ethnicity, income and education). Further questions were asked regarding the frequency of exposure to NVPs in public, whether they had a partner or close friends who vaped and whether they believed society or those considered important to them approved of NVPs.

Findings: Adjusting for relevant covariates, compared with Australian respondents, those in England, Canada and the United States were more likely to report frequent exposure to NVPs in public (83.1%, 57.3% and 48.3%, respectively, compared to 19.8% in Australia; P < 0.0001), having a partner who vaped (13.8%, 7.1% and 7.7%, respectively, compared to 2.1% in Australia; P < 0.0001) and having close friend(s) who vaped (31.7%, 25.3%, 20.9%, respectively, compared to 10.0% in Australia; P < 0.0001). Compared with Australian respondents, respondents from England were more likely to report that society (27.6% compared to 12.3% in Australia; P < 0.0001) and people important to them approved of NVP use (28.9% compared to 14.3% in Australia; P < 0.0001).

Conclusions: Norms towards nicotine vaping product (NVP) use appear to vary among countries with different regulatory contexts regarding sales and advertising.

No abstract is available.