Scientific Journal Articles
Showing 376-400 of 634 Results
Zawahir, et al. 2013. Effectiveness of antismoking media messages and education among adolescents in Malaysia and Thailand: Findings from the International Tobacco Control Southeast Asia Project
Introduction: Finding ways to discourage adolescents from taking up smoking is important because those who begin smoking at an earlier age are more likely to become addicted and have greater difficulty in quitting. This article examined whether anti smoking messages and education could help to reduce smoking susceptibility among adolescents in two Southeast Asian countries and to explore the possible moderating effect of country and gender.
Methods: Data came from Wave 1 of the International Tobacco Control Southeast Asia Project (ITC-SEA) survey conducted in Malaysia (n = 1,008) and Thailand (n = 1,000) where adolescents were asked about receiving antismoking advice from nurses or doctors, being taught at schools about the danger of smoking, noticing antismoking messages, knowledge of health effects of smoking, beliefs about the health risks of smoking, smoking susceptibility, and demographic information. Data were analyzed using chi-square tests and logistic regression models.
Results: Overall, significantly more Thai adolescents reported receiving advice from their nurses or doctors about the danger of smoking (p < .001), but no country difference was observed for reported antismoking education in schools and exposure to antismoking messages. Multivariate analyses revealed that only provision of antismoking education at schools was significantly associated with reduced susceptibility to smoking among female Malaysian adolescents (OR = 0.26). Higher knowledge of smoking harm and higher perceived health risk of smoking were associated with reduced smoking susceptibility among Thai female (OR = 0.52) and Malaysian male adolescents (OR = 0.63), respectively.
Conclusions: Educating adolescents about the dangers of smoking in schools appears to be the most effective means of reducing adolescents’ smoking susceptibility in both countries, although different prevention strategies may be necessary to ensure effectiveness for male and female adolescents.[download PDF]
Kasza, et al. 2013. Effectiveness of stop-smoking medications: Findings from the International Tobacco Control (ITC) Four Country Survey
Aim: To evaluate the population effectiveness of stop-smoking medications while accounting for potential recall bias by controlling for quit attempt recency.
Design: Prospective cohort survey.
Setting: United Kingdom, Canada, Australia and the United States.
Participants: A total of 7436 adult smokers (18+ years) selected via random digit dialling and interviewed as part of the International Tobacco Control Four Country Survey (ITC-4) between 2002 and 2009. Primary analyses utilized the subset of respondents who participated in 2006 or later (n = 2550).
Measurements: Continuous abstinence from smoking for 1 month/6 months.
Findings: Among participants who recalled making a quit attempt within 1 month of interview, those who reported using varenicline, bupropion or nicotine patch were more likely to maintain 6-month continuous abstinence from smoking compared to those who attempted to quit without medication [adjusted odds ratio (OR) 5.84, 95% confidence interval (CI) (2.12–16.12), 3.94 (0.87–17.80), 4.09 (1.72–9.74), respectively]; there were no clear effects for oral NRT use. Those who did not use any medication when attempting to quit tended to be younger, to be racial/ethnic minorities, to have lower incomes and to believe that medications do not make quitting easier.
Conclusions: Consistent with evidence from randomized controlled trials, smokers in the United Kingdom, Canada, Australia and the United States are more likely to succeed in quit attempts if they use varenicline, bupropion or nicotine patch. Previous population studies that failed to find an effect failed to control adequately for important sources of bias.[download PDF]
McKee, et al. 2013. Longitudinal associations between smoking cessation medications and alcohol consumption among smokers in the International Tobacco Control Four Country Survey [access full article]
Background: Available evidence suggests that quitting smoking does not alter alcohol consumption. However, smoking cessation medications may have a direct impact on alcohol consumption independent of any effects on smoking cessation. Using an international longitudinal epidemiological sample of smokers, we evaluated whether smoking cessation medications altered alcohol consumption independent of quitting smoking.
Methods: Longitudinal data were analyzed from the International Tobacco Control Four Country (ITC-4) Survey between 2007 and 2008, a telephone survey of nationally representative samples of smokers from the United Kingdom, Australia, Canada, and the United States (n = 4,995). Quantity and frequency of alcohol consumption, use of smoking cessation medications (varenicline, nicotine replacement [NRT], and no medications), and smoking behavior were assessed across 2 yearly waves. Controlling for baseline drinking and changes in smoking status, we evaluated whether smoking cessation medications were associated with reduced alcohol consumption.
Results: Varenicline was associated with a reduced likelihood of any drinking compared with nicotine replacement (OR = 0.56; 95% CI = 0.34 to 0.94), and consuming alcohol once a month or more compared to nicotine replacement (OR = 0.43; 95% CI = 0.27 to 0.69) or no medication (OR = 0.63; 95% CI = 0.41 to 0.99). Nicotine replacement was associated with an increased likelihood of consuming alcohol once a month or more compared to no medication (OR = 1.14; 95% CI = 1.03 to 1.25). Smoking cessation medications were not associated with more frequent drinking (once a week or more) or typical quantity consumed per episode. Medication effects on drinking frequency were independent of smoking cessation.
Conclusions: This epidemiological investigation demonstrated that varenicline was associated with a reduced frequency of alcohol consumption. Continued work should clarify under what conditions nicotine replacement therapies may increase or decrease patterns of alcohol consumption.[download PDF]
Swayampakala, et al. 2013. Level of cigarette consumption and quit behaviour in a population of low-intensity smokers: Longitudinal results from the International Tobacco Control (ITC) Survey in Mexico
Background: Mexican smokers are more likely to be non-daily smokers and to consume fewer cigarettes per day than smokers in other countries. Little is known about their quit behaviors.
Aim: The aim of this study is to determine factors associated with having made a quit attempt and being successfully quit at 14-month follow-up in a population-based cohort of adult Mexicans who smoke at different levels of intensity.
Design: A longitudinal analysis of wave-III and wave-IV (2010) Mexican administration of International Tobacco Control Policy Evaluation Project was conducted.
Setting: This study was conducted in six large urban centers in Mexico Participants: The participants of this study comprised 1206 adults who were current smokers at wave-III and who were followed to wave-IV.
Measurements: We compared three groups of smokers: non-daily smokers—who did not smoke every day in the past 30 days (n=398), daily light smokers who smoked every day at a rate of ≤5 cigarettes per day (n=368) and daily heavy smokers who smoked every day at a rate of >5 cigarettes per day (n=434). Data on smoking behavior, psychosocial characteristics and socio-demographics were collected at baseline and after 14 months.
Findings: In multivariate logistic regression predicting having made a quit attempt at follow-up, significant factors included being a non-daily smoker versus a heavy daily smoker (ORadj=1.83, 95% CI: 1.19–2.83), less perceived addiction (ORadj=1.86, 95% CI: 1.20–2.87), greater worry that cigarettes will damage health (ORadj=2.04, 95% CI: 1.16–3.61) and having made a quit attempt in the past year at baseline (ORadj=1.70, 95% CI: 1.23–2.36). In multivariate logistic regression predicting being successfully quit at one-year follow-up, significant factors included being a non-daily smoker versus a heavy daily smoker (ORadj=2.54, 95% CI: 1.37–4.70) and less perceived addiction (not addicted: ORadj=3.26, 95% CI: 1.73–6.14; not much: ORadj= 1.95, 95% CI: 1.05–3.62 versus very much).
Conclusions: Mexican adult smokers who are non-daily smokers were more likely than daily heavy smokers to have attempted to quit during follow-up and to succeed in their quit attempt. Future research should determine whether tobacco control policies and programs potentiate this tendency and which interventions are needed to help heavier smokers to quit.[download PDF]
Surani, et al. 2013. Intention to quit among Indian tobacco users: Findings from International Tobacco Control Policy Evaluation India Pilot Survey [access full article]
Introduction: Tobacco users face barriers not just in quitting, but also in thinking about quitting. The aim of this study was to understand factors encouraging intention to quit from the 2006 International Tobacco Control Policy (TCP) Evaluation India Pilot Study Survey.
Materials and Methods: A total of 764 adult respondents from urban and rural areas of Maharashtra and Bihar were surveyed through face-to-face individual interviews, with a house-to-house approach. Dependent variable was "intention to quit tobacco." Independent variables were demographic variables, peer influence, damage perception, receiving advice to quit, and referral to cessation services by healthcare professionals and exposure to anti-tobacco messages. Logistic regression model was used with odds ratio adjusted for location, age, gender, and marital status for statistical analysis.
Results: Of 493 tobacco users, 32.5% intended to quit. More numbers of users who were unaware about their friends' tobacco use intended to quit compared to those who were aware (adjusted OR = 8.06, 95% CI = 4.58-14.19). Higher numbers of users who felt tobacco has damaged their health intended to quit compared to those who did not feel that way (adjusted OR = 5.62, 95% CI = 3.53-8.96). More numbers of users exposed to anti-tobacco messages in newspapers/magazines (adjusted OR = 1.76, 95% CI = 1.02-3.03), restaurants (adjusted OR = 2.47, 95% CI = 1.37-4.46), radio (adjusted OR=4.84, 95% CI = 3.01-7.78), cinema halls (adjusted OR = 9.22, 95% CI = 5.31-15.75), and public transportation (adjusted OR = 10.58, 95% = 5.90-18.98) intended to quit compared to unexposed users.
Conclusion: Anti-tobacco messages have positive influence on user's intentions to quit.[download PDF]
Yong, et al. 2013. Urban Chinese smokers from lower socioeconomic backgrounds face more barriers to quitting: Results from the International Tobacco Control China Survey
Introduction: Research findings on social disparities in barriers to quitting faced by smokers from mainly Western English-language countries may or may not generalize to smokers in China. This paper sought to determine whether nicotine dependence, quitting self-efficacy, quitting interest differ by socio-economic status (SES), and whether they mediate the relationship between SES and quitting behavior of urban Chinese smokers.
Methods: Data come from 7,309 adult smokers who participated in the first 3 waves of the International Tobacco Control-China survey conducted in 7 cities across China. The association of socio-economic indicators with nicotine dependence, quitting self-efficacy, quitting interest, and behavior was evaluated using generalized estimating equations models along with a formal test of mediational effects.
Results: The SES index indicated that those from lower SES were significantly more addicted (p < .001), less confident (p < .001), and less interested in quitting (p < .05). This finding was replicated by education and employment status, but it was not clearly related to income. Mediational analyses revealed that the effects of SES on making quit attempts and quit success among those who tried were indirect. For quit attempts, self-efficacy, interest to quit, and heaviness of smoking index (HSI) were all significant mediators of the SES effect (p < .001), but for maintenance, only HSI was a significant mediator (p < .001).
Conclusions: Urban Chinese smokers from lower socio- economic backgrounds experience greater levels of psychological and behavioral barriers to quitting than their counterparts from higher socio-economic backgrounds and as such, they need more help to quit and do so successfully.[download PDF]
Szklo, et al. 2013. Understanding the relationship between socioeconomic status, smoking cessation services provided by the health system and smoking cessation behaviour in Brazil
Increasing the effectiveness of smoking cessation policies requires greater consideration of the cultural and socioeconomic complexities of smoking. The purpose of this paper is to explore the association between socioeconomic status and “selected midpoints” linked to smoking cessation in Brazil. Data was collected from a representative sample of urban adult smokers as part of the ITC-Brazil Survey (2009, N = 1,215). After controlling for age and gender, there were no statistically significant differences quit attempts in the last six months between individuals with different socioeconomic status. However, smokers with high socioeconomic status visited a doctor 1.54 times more often than those with low socioeconomic status (p-value = 0.017), and were also 1.65 times more likely to receive advice to quit smoking (p-value = 0.025). Our results demonstrate that disparities in health and socioeconomic status are still a major challenge for policymakers to increase the population impact of tobacco control actions worldwide.[download PDF]
Adkison, et al. 2013. Electronic nicotine delivery systems: International Tobacco Control Four-Country Survey
Background: Electronic nicotine delivery systems (ENDS) initially emerged in 2003 and have since become widely available globally, particularly over the Internet.
Purpose: Data on ENDS usage patterns are limited. The current paper examines patterns of ENDS awareness, use, and product-associated beliefs among current and former smokers in four countries.
Methods: Data come from Wave 8 of the International Tobacco Control Four-Country Survey, collected July 2010 to June 2011 and analyzed through June 2012. Respondents included 5939 current and former smokers in Canada (n_1581); the U.S. (n_1520); the United Kingdom (UK; n_1325); and Australia (n_1513).
Results: Overall, 46.6% were aware of ENDS (U.S.: 73%, UK: 54%, Canada: 40%, Australia: 20%); 7.6% had tried ENDS (16% of those aware of ENDS); and 2.9% were current users (39% of triers). Awareness of ENDS was higher among younger, non-minority smokers with higher incomes who were heavier smokers. Prevalence of trying ENDS was higher among younger, nondaily smokers with a high income and among those who perceived ENDS as less harmful than traditional cigarettes. Current use was higher among both nondaily and heavy (_20 cigarettes per day) smokers. In all, 79.8% reported using ENDS because they were considered less harmful than traditional cigarettes; 75.4% stated that they used ENDS to help them reduce their smoking; and 85.1% reported using ENDS to help them quit smoking.
Conclusions: Awareness of ENDS is high, especially in countries where they are legal (i.e., the U.S. and UK). Because trial was associated with nondaily smoking and a desire to quit smoking, ENDS may have the potential to serve as a cessation aid.[download PDF]
Partos, et al. 2013. The quitting rollercoaster: How recent quitting history affects future cessation outcomes (data from the International Tobacco Control 4-Country Cohort Study)
Introduction: Most smokers have a history of unsuccessful quit attempts. This study used data from 7 waves (2002–2009) of the International Tobacco Control 4-country cohort study to examine the role of smokers’ quitting history (e.g., recency, length, and number of previous quit attempts) on their subsequent likelihood of making a quit attempt and achieving at least 6 months of sustained abstinence.
Methods: Generalized estimating equations were used, allowing for estimation of relationships between variables across repeated observations while controlling for correlations from multiple responses by the same individual (29,682 observations from 13,417 individuals).
Results: The likelihood of a future quit attempt increased independently with recency and number of prior attempts. By contrast, the likelihood of achieving sustained abstinence of at least 6 months was reduced for smokers with a failed quit attempt within the last year (15.1% vs. 27.1% for those without, p < .001). Two or more failed attempts (vs. only one) in the previous year were also associated with a lower likelihood of achieving sustained abstinence (OR: 0.57, 95% CI: 0.38–0.85). Effects persisted after controlling for levels of addiction, self-efficacy to quit, and use of stop-smoking medications.
Conclusions: There appears to be a subset of smokers who repeatedly attempt but fail to remain abstinent from tobacco. Understanding why repeated attempts might be less successful in the long term is an important research priority because it implies a need to tailor treatment approaches for those who are motivated to quit but persistently relapse back to smoking.[download PDF]
Sansone, et al. 2013. Comparing the experience of regret and its predictors among smoking adults in four countries [access full article]
Introduction: Nearly all smokers in high-income Western countries report that they regret smoking (Fong, G. T., Hammond, D., Laux, F. L., Zanna, M. P., Cummings, M. K., Borland, R., & Ross, H. . The near-universal experience of regret among smokers in four countries: Findings from the International Tobacco Control Policy Evaluation Survey. Nicotine and Tobacco Research, 6, S341–S351. doi:10.1080/14622200412331320743), but no research to date has examined the prevalence of regret among smokers in non-Western, low- and middle-income countries.
Methods: Data were from the International Tobacco Control (ITC) Surveys of smokers in 4 Asian countries (China, Malaysia, South Korea, and Thailand); N = 9,738. Regret was measured with the statement: “If you had to do it over again, you would not have started smoking.”
Results: Prevalence of regret in 3 countries (South Korea = 87%, Malaysia = 77%, and China = 74%) was lower than that found by Fong et al. in the United States, Australia, Canada, and the United Kingdom (89%–90%); but was higher in Thailand (93%). These significant country differences in regret corresponded with differences in tobacco control and norms regarding smoking. The predictors of regret in the Asian countries were very similar to those in the 4 Western countries: Regret was more likely to be experienced by smokers who smoked fewer cigarettes per day, perceived greater benefits of quitting and higher financial costs of smoking, had more prior quit attempts, worried that smoking would damage their health, and felt that their loved ones and society disapproved of smoking. Regret was also positively associated with intentions to quit (r = 0.23, p < .001).
Conclusions: Across the Asian countries and high-income Western countries, the prevalence of regret varies, but the factors predicting regret are quite consistent. Regret may be an important indicator of tobacco control and is related to factors associated with future quitting.[download PDF]
Sansone, et al. 2013. Time perspective as a predictor of smoking status: Findings from the International Tobacco Control (ITC) Surveys in Scotland, France, Germany, China, and Malaysia
Background: Prior studies have demonstrated that time perspective—the propensity to consider shortversus long-term consequences of one’s actions—is a potentially important predictor of health-related behaviors, including smoking. However, most prior studies have been conducted within single highincome countries. The aim of this study was to examine whether time perspective was associated with the likelihood of being a smoker or non-smoker across five countries that vary in smoking behavior and strength of tobacco control policies.
Methods: The data were from the International Tobacco Control (ITC) Surveys in five countries with large probability samples of both smokers (N=10,341) and non-smokers (N=4,955): Scotland, France, Germany, China, and Malaysia. The surveys were conducted between 2005 and 2008. Survey respondents indicated their smoking status (smoker vs. non-smoker) and time perspective (future oriented vs. not future-oriented) and provided demographic information.
Results: Across all five countries, non-smokers were significantly more likely to be future-oriented (66%) than were smokers (57%), χ2 (1, N = 15,244) = 120.64, p < .001. This bivariate relationship between time perspective and smoking status held in a multivariate analysis. After controlling for country, age, sex, income, education, and ethnicity (language in France), those who were future-oriented had 36% greater odds of being a non-smoker than a smoker (95% CI: 1.22 to 1.51, p<.001).
Conclusion: These findings establish time perspective as an important predictor of smoking status across multiple countries and suggest the potential value of incorporating material to enhance future orientation in smoking cessation interventions.[download PDF]
Fong, et al. 2013. Évaluation de l’interdiction de fumer dans les lieux publics en France un an et cinq ans après sa mise en œuvre
France implemented a comprehensive smoke-free policy in public places in February 2007 for workplaces, shopping centres, airports, train stations, hospitals and schools. On January 2008, it was extended to meeting places (bars, restaurants, hotels, casinos, nightclubs). This paper evaluates France’s smoke-free law based on the International Tobacco Control Policy Evaluation Project in France (the ITC France Project), which conducted a cohort survey of approximately 1,500 smokers and 500 non-smokers before the implementation of the laws (Wave 1, conducted December 2006 to February 2007) and two waves after the implementation (Wave 2, conducted between September-November 2008; and Wave 3, conducted between September-December 2012). Results show that the smoke-free law led to a very significant and near total elimination of indoor smoking in key venues such as bars (from 95.9% to 3.7%) and restaurants (from 64.7% to 2.3%) at Wave 2, which was sustained four years later at Wave 3 (1.4% in restaurants; 6.6% in bars). Smoking in workplaces declined significantly after the law (from 42.6% to 19.3%), which continued to decline at Wave 3 (to 12.8%). Support for the smoke-free law increased significantly after their implementation and continued to increase at Wave 3 (among smokers for bars and restaurants; among smokers and non-smokers for workplaces). The findings demonstrate that smoke-free policies that are implemented in ways consistent with the Guidelines for Article 8 of the WHO Framework Convention on Tobacco Control (WHO FCTC) lead to substantial and sustained reductions in tobacco smoke in public places while also leading to high levels of support by the public.
En France, l’interdiction de fumer dans les lieux publics a été mise en œuvre en février 2007 pour les lieux de travail, les centres commerciaux, les aéroports, les gares, les hôpitaux et les écoles. En janvier 2008, elle a été étendue aux lieux de convivialité (bars, restaurants, hôtels, casinos, discothèques). L’évaluation proposée dans cet article s’inscrit dans le cadre du volet français d’International Tobacco Control (ITC), projet d’évaluation des politiques publiques de lutte antitabac. Une enquête de cohorte d’environ 1 500 fumeurs et 500 non-fumeurs a été mise en place avant la mise en œuvre de la loi (vague 1, de décembre 2006 à février 2007); la vague 2 a eu lieu entre septembre et novembre 2008, et la vague 3, entre septembre et décembre 2012. Les résultats de la vague 2 montrent que la législation antitabac a conduit, dès la fin 2008, à une élimination quasi totale du tabagisme à l’intérieur d’endroits clés tels que les bars (de 95,9% à 3,7%) et les restaurants (de 64,7% à 2,3%), persistant quatre ans plus tard (1,4% dans les restaurants, 6,6% dans les bars à la vague 3). Le tabagisme sur le lieu de travail a diminué de façon significative après la loi (de 42,6% à 19,3%) et a continué de baisser (12,8%) à la vague 3. Le soutien à l’interdiction de fumer dans les lieux publics a augmenté de façon significative après sa mise en œuvre et a continué d’augmenter à la vague 3 (parmi les fumeurs concernant les bars et restaurants, parmi les fumeurs et les non-fumeurs concernant les lieux de travail). Les résultats démontrent que les politiques antitabac mises en œuvre de manière cohérente avec les lignes directrices relatives à l’article 8 de la Convention-cadre de l’OMS pour la lutte antitabac (CCLAT) conduisent à des réductions substantielles et durables du tabagisme passif dans les lieux publics, ainsi qu’à des niveaux de soutien élevés par la population.[download PDF]
Adkison, et al. 2013. Impact of reduced ignition propensity cigarette regulation on consumer smoking behavior and quit intentions: Evidence from 6 waves (2004–11) of the ITC Four Country Survey
Background: Although on the decline, smoking-related fires remain a leading cause of fire death in the United States and United Kingdom and account for over 10% of fire-related deaths worldwide. This has prompted lawmakers to enact legislation requiring manufacturers to implement reduced ignition propensity (RIP) safety standards for cigarettes. The current research evaluates how implementation of RIP safety standards in different countries influenced smokers’ perceptions of cigarette selfextinguishment, frequency of extinguishment, and the impact on consumer smoking behaviors, including cigarettes smoked per day and planning to quit.
Methods: Participants for this research come from Waves 3 through 8 of the International Tobacco Control (ITC) Four Country Survey conducted longitudinally from 2004 through 2011 in the United States, United Kingdom, Australia, and Canada.
Results: Perceptions of cigarette self-extinguishment and frequency of extinguishment increased concurrently with an increase in the prevalence of RIP safety standards for cigarettes. Presence of RIP safety standards was also associated with a greater intention to quit smoking, but was not associated with the number of cigarettes smoked per day. Intention to quit was higher among those who were more likely to report that their cigarettes self-extinguish sometimes and often, but we found no evidence of an interaction between frequency of extinguishment and RIP safety standards on quit intentions.
Conclusions: Overall, because these standards largely do not influence consumer smoking behavior, RIP implementation may significantly reduce the number of cigarette-related fires and the associated death and damages. Further research should assess how implementation of RIP safety standards has influenced smoking-related fire incidence, deaths, and other costs associated with smoking-related fires.[download PDF]
Mutti, et al. 2013. The efficacy of cigarette warning labels on health beliefs in the United States and Mexico
Concern over health risks is the most common motivation for quitting smoking. Health warnings on tobacco packages are among the most prominent interventions to convey the health risks of smoking. Face-to-face surveys were conducted in Mexico (n = 1,072), and a web-based survey was conducted in the US (n = 1,449) to examine the efficacy of health warning labels on health beliefs. Respondents were randomly assigned to view two sets of health warnings (each with one text-only warning and 5–6 pictorial warnings) for two different health effects. Respondents were asked whether they believed smoking caused 12 different health effects. Overall, the findings indicate high levels of health knowledge in both countries for some health effects, although significant knowledge gaps remained; for example, less than half of respondents agreed that smoking causes impotence and less than one third agreed that smoking causes gangrene. Mexican respondents endorsed a greater number of correct beliefs about the health effects of smoking than did the U.S. sample. In both countries, viewing related health warning labels increased beliefs about the health risks of smoking, particularly for less well-known health effects such as gangrene, impotence, and stroke.[download PDF]
Fathelrahman, et al. 2013. Stronger pack warnings predict quitting more than weaker ones: Finding from the ITC Malaysia and Thailand surveys
Background: We examined the impact of cigarette pack warning labels on interest in quitting and subsequent quit attempts among adult smokers in Malaysia and Thailand.
Methods: Two overlapping cohorts of adults who reported smoking factory- made cigarettes from Malaysia and Thailand were interviewed face-to-face (3189 were surveyed at baseline and 1781 recontacted at Wave 2; 2361 current smokers were surveyed at Wave 2 and 1586 re-contacted at Wave 3). In Thailand at baseline, large text only warnings were assessed, while at Wave 2 new large graphic warnings were assessed. In Malaysia, during both waves small text only warnings were in effect. Reactions were used to predict interest in quitting, and to predict making quit attempts over the following inter-wave interval.
Results: Multivariate predictors of “interest in quitting” were comparable across countries, but predictors of quit attempts varied. In both countries, cognitive reactions to warnings (adjusted ORs; 1.57 & 1.69 for Malaysia at wave 1 and wave 2 respectively and 1.29 & 1.19 for Thailand at wave 1 and wave 2 respectively), forgoing a cigarette (except Wave 2 in Malaysia) (adjusted ORs; 1.77 for Malaysia at wave 1 and 1.54 & 2.32 for Thailand at wave 1 and wave 2 respectively), and baseline knowledge (except wave 2 in both countries) (adjusted ORs; 1.71 & 1.51 for Malaysia and Thailand respectively) were positively associated with interest in quitting at that wave. In Thailand only, “cognitive reactions to warnings” (adjusted ORs; 1.12 & 1.23 at wave 1 and wave 2 respectively), “forgoing a cigarette” (adjusted OR = 1.55 at wave 2 only) and “an interest in quitting” (adjusted ORs; 1.61 & 2.85 at wave 1 and wave 2 respectively) were positively associated with quit attempts over the following inter-wave interval. Salience was negatively associated with subsequent quit attempts in both Malaysia and Thailand, but at Wave 2 only (adjusted ORs; 0.89 & 0.88 for Malaysia and Thailand respectively).
Conclusion: Warnings appear to have common mechanisms for influencing quitting regardless of warning strength. The larger and more informative Thai warnings were associated with higher levels of reactions predictive of quitting and stronger associations with subsequent quitting, demonstrating their greater potency.[download PDF]
Introduction: Many governments around the world have banned the use of misleading cigarette descriptors such as “light” and “mild” because the cigarettes so labeled were found not to reduce smokers' health risks. However, underlying cigarette design features, which are retained in many brands, likely contribute to ongoing belief that these cigarettes are less harmful by producing perceptions of lightness/smoothness through lighter taste and reduced harshness and irritation.
Methods: Participants (N = 320) were recruited from the International Tobacco Control U.S. Survey conducted in 2009 and 2010, when they answered questions about smoking behavior, attitudes and beliefs about tobacco products, and key mediators and moderators of tobacco use behaviors. Participants also submitted an unopened pack of their usual brand of cigarettes for analysis using established methods.
Results: Own-brand filter ventilation level (M 29%, range 0%-71%) was consistently associated with perceived lightness (p < .001) and smoothness (p = .005) of own brand. Those whose brand bore a light/mild label (55% of participants) were more likely to report their cigarettes were lighter [71.9% vs. 41.9%; χ(2)(2) = 38.1, p < .001] and smoother than other brands [75.5% vs. 68.7%; χ(2)(2) = 7.8, p = .020].
Conclusion: Product design features, particularly filter ventilation, influence smokers' beliefs about product attributes such as lightness and smoothness, independent of package labels. Regulation of cigarette design features such as filter ventilation should be considered as a complement to removal of misleading terms in order to reduce smokers' misperceptions regarding product risks.[download PDF]
Thompson, et al. 2013. Accounting for the effects of data collection method: Application to the International Tobacco Control Netherlands Survey
Qualitative surveys employ an ever wider range of data collection methods. The development of telephone surveys in the 1900s offered a cheaper alternative to face-to-face interviews (Riandey and Firdion, 1993). Later, as the number of cell phone owners increased, technical advances made it possible to conduct detailed interviews and to directly select random samples of adults by means of cell phone numbers. More recently, the spread of the Internet has made it possible to conduct surveys with minimal data collection costs on “spontaneous” samples of volunteers or on representative samples of respondents recruited by phone. These innovations raise questions of sample representativeness and of the effect of data collection mode on the responses obtained. Analysing the Dutch version of an international survey on tobacco control, Mary Thompson and her colleagues compare the results obtained on two subsamples, on that responded via the web, and the other by phone. They highlight differences linked to the respondents' characteristics and other attributable to the data collection mode, and present a method or estimating the results that would have been obtained using a single collection method, i.e. that used in the other countries.[download PDF]
Nagelhout, et al. 2012. Age and educational inequalities in smoking cessation due to three population-level tobacco control interventions: Findings from the International Tobacco Control (ITC) Netherlands Survey [access full article]
This study aimed to examine age and educational inequalities in smoking cessation due to the implementation of a tobacco tax increase, smoke-free legislation and a cessation campaign. Longitudinal data from 962 smokers aged 15 years and older were used from three survey waves of the International Tobacco Control (ITC) Netherlands Survey. The 2008 survey was performed before the implementation of the interventions and the 2009 and 2010 surveys were performed after the implementation. No significant age and educational differences in successful smoking cessation were found after the implementation of the three tobacco control interventions, although smokers aged 15–39 years were more likely to attempt to quit. Of the three population-level tobacco control interventions that were implemented simultaneously in the Netherlands, only the smoke-free legislation seemed to have increased quit attempts. The price increase of cigarettes may have been only effective in stimulating smoking cessation among younger smokers. Larger tax increases, stronger smoke-free legislation and media campaigns about the dangers of (second-hand) smoking are needed in the Netherlands.[download PDF]
Yong, et al. 2012. Adult smokers’ reactions to pictorial health warning labels on cigarette packs in Thailand and moderating effects of type of cigarette smoked: Findings from the International Tobacco Control Southeast Asia Survey [access full article]
Introduction: In this study, we aimed to examine, in Thailand, the impact on smokers’ reported awareness of and their cognitive and behavioral reactions following the change from text-only to pictorial warnings printed on cigarette packs. We also sought to explore differences by type of cigarette smoked (roll-your-own [RYO] vs. factory-made [FM] cigarettes).
Methods: Data came from the International Tobacco Control Southeast Asia Survey, conducted in Thailand and Malaysia, where a representative sample of 2,000 adult smokers from each country were recruited and followed up. We analyzed data from one wave before (Wave 1) and two waves after the implementation of the new pictorial warnings (two sets introduced at Waves 2 and 3, respectively) in Thailand, with Malaysia, having text-only warnings, serving as a control.
Results: Following the warning label change in Thailand, smokers’ reported awareness and their cognitive and behavioral reactions increased markedly, with the cognitive and behavioral effects sustained at the next follow-up. By contrast, no significant change was observed in Malaysia over the same period. Compared to smokers who smoke any FM cigarettes, smokers of only RYO cigarettes reported a lower salience but greater cognitive reactions to the new pictorial warnings.
Conclusions: The new Thai pictorial health warning labels have led to a greater impact than the text-only warning labels, and refreshing the pictorial images may have helped sustain effects. This finding provides strong support for introducing pictorial warning labels in low- and middle-income countries, where the benefits may be even greater, given the lower literacy rates and generally lower levels of readily available health information on the risks of smoking.[download PDF]
Wakefield, et al. 2012. Does tobacco control mass media campaign exposure prevent relapse among recent quitters? [access full article]
Objective:To determine whether greater mass media campaign exposure may assist recent quitters to avoid relapse.
Method: Using date of data collection and postcode, media market estimates of televised tobacco-control advertising exposure measured by gross ratings points (GRPs) were merged with a replenished cohort study of 443 Australians who had quit in the past year. Participants' demographic and smoking characteristics prior to quitting, and advertising exposure in the period after quitting, were used to predict relapse 1 year later.
Results: In multivariate analysis, each increase in exposure of 100 GRPs (i.e., 1 anti-smoking advertisement) in the three-month period after the baseline quit was associated with a 5% increase in the odds of not smoking at follow-up (OR = 1.05, 95% CI 1.02-1.07, p < 0.001). This relationship was linear and unmodified by length of time quit prior to the baseline interview. At the mean value of 1081 GRPs in the 3 months after the baseline-quit interview, the predicted probability of being quit at follow-up was 52%, whereas it was 41% for the minimum (0) and 74% for the maximum (3,541) GRPs.
Conclusion: Greater exposure to tobacco-control mass media campaigns may reduce the likelihood of relapse among recent quitters.[download PDF]
Siahpush , et al. 2012. Cigarette prices, cigarette expenditure and smoking-induced deprivation: Findings from the International Tobacco Control Mexico Survey [access full article]
Aim: Mexico implemented annual tax increases between 2009 and 2011. We examined among current smokers the association of price paid per cigarette and daily cigarette expenditure with smoking-induced deprivation (SID) and whether the association of price or expenditure with SID varies by income.
Methods: We used data (n=2410) from three waves of the International Tobacco Control Mexico survey (ie, 2008, 2010, 2011) and employed logistic regression to estimate the association of price paid per cigarette and daily cigarette expenditure with the probability of SID ('In the last 6 months, have you spent money on cigarettes that you knew would be better spent on household essentials like food?').
Results: Price paid per cigarette increased from Mex$1.24 in 2008, to Mex$1.36 in 2010, to Mex$1.64 in 2011. Daily cigarette expenditure increased from Mex$6.9, to Mex$7.6 and to Mex$8.4 in the 3 years. There was no evidence of an association between price and SID. However, higher expenditure was associated with a higher probability of SID. There was no evidence that the association of price or expenditure with SID varied by income.
Conclusion: Tax increases in Mexico have resulted in smokers paying more and spending more for their cigarettes. Those with higher cigarette expenditure experience more SID, with no evidence that poorer smokers are more affected.[download PDF]
Nagelhout, et al. 2012. The influence of newspaper coverage and a media campaign on smokers’ support for smoke-free bars and restaurants and on secondhand smoke harm awareness: Findings from the International Tobacco Control (ITC) Netherlands Survey [access full article]
Objective: To assess the influence of newspaper coverage and a media campaign about Dutch smoke-free legislation on smokers’ support for smoke-free bars and restaurants and on secondhand smoke (SHS) harm awareness.
Design and main outcome measures: A content analysis was conducted of 1041 newspaper articles on the smoke-free legislation published in six Dutch newspapers from March 2008 to April 2009. Smokers who were regular readers of at least one of these newspapers (n¼677) were selected from the pre-ban and post-ban waves of the International Tobacco Control Netherlands Survey. Exposure to newspaper coverage and the implementation campaign was correlated with changes in smokers’ support for smoke-free bars and restaurants and SHS harm awareness.
Results: Most newspaper coverage was found to be negative towards the smoking ban (57%) and focused on economic aspects (59%) rather than health aspects (22%). Exposure to this coverage had a small but significantly negative effect on support for smoke-free bars and restaurants (b¼_0.09, p¼0.013). Among higher educated smokers, exposure to positive newspaper coverage had a more positive effect on support for smoke-free bars and restaurants. In addition, exposure to the implementation campaign had a small but significantly positive effect on SHS harm awareness (b¼0.11, p¼0.001).
Conclusion: Media attention on smoke-free legislation can influence smokers’ support for the legislation and SHS harm awareness. Tobacco control advocates should aim to establish positive media attention that puts forward the health arguments for the legislation.[download PDF]
Partos, et al. 2012. Socio-economic disadvantage at the area level poses few direct barriers to smoking cessation for Australian smokers: Findings from the International Tobacco Control Australian cohort survey [access full article]
Introduction: Area-level indicators of socio-economic variation are frequently included in models of individual health outcomes. Area disadvantage is linearly related to smoking prevalence, but its relation to cessation outcomes is less well understood.
Aims: To explore the relationship between area-level disadvantage and prospective data on smoking cessation.
Design and Methods: The Australian cohort of the International Tobacco Control Four-Country Survey (N = 3503) was used to prospectively examine the contribution of area-level socio-economic disadvantage to predicting three important smoking-cessation outcomes: making a quit attempt, achieving 1 month abstinence and achieving 6 month abstinence from smoking, while controlling for individual-level socio-economic indicators and other individual-level covariates related to smoking cessation.
Results: Only two independent associations were observed between socio-economic disadvantage and cessation outcomes. Area-level disadvantage was related to 1 month abstinence in a non-linear fashion, and the individual experience of smoking-induced deprivation was associated with a lower likelihood of making quit attempts.
Discussion: Despite the documented higher prevalence of smoking among the more disadvantaged and in more disadvantaged areas, socio-economic disadvantage was not consistently related to making quit attempts, nor to medium-term success. Nevertheless, indirect effects of disadvantage, like its impact on psychological distress, cannot be ruled out, and considering smokers’ individual psychosocial circumstances is likely to aid cessation efforts.
Conclusion: Socio-economic disadvantage, particularly at the area level, poses few direct barriers to smoking cessation[download PDF]
Nagelhout, et al. 2012. Pathways of change explaining the effect of smoke-free legislation on smoking cessation in the Netherlands. An application of the International Tobacco Control conceptual model [access full article]
Introduction: This study aims to test the pathways of change from individual exposure to smoke-free legislation on smoking cessation, as hypothesized in the International Tobacco Control (ITC) Conceptual Model.
Methods: A nationally representative sample of Dutch smokers aged 15 years and older was surveyed during 4 consecutive annual surveys. Of the 1,820 baseline smokers, 1,012 participated in the fourth survey. Structural Equation Modeling was employed to test a model of the effects of individual exposure to smoke-free legislation through policy-specific variables (support for smoke-free legislation and awareness of the harm of [secondhand] smoking) and psychosocial mediators (attitudes, subjective norm, self-efficacy, and intention to quit) on quit attempts and quit success.
Results: The effect of individual exposure to smoke-free legislation on smoking cessation was mediated by 1 pathway via support for smoke-free legislation, attitudes about quitting, and intention to quit smoking. Exposure to smoke-free legislation also influenced awareness of the harm of (secondhand) smoking, which in turn influenced the subjective norm about quitting. However, only attitudes about quitting were significantly associated with intention to quit smoking, whereas subjective norm and self-efficacy for quitting were not. Intention to quit predicted quit attempts and quit success, and self-efficacy for quitting predicted quit success.
Conclusion: Our findings support the ITC Conceptual Model, which hypothesized that policies influence smoking cessation through policy-specific variables and psychosocial mediators. Smoke-free legislation may increase smoking cessation, provided that it succeeds in influencing support for the legislation.[download PDF]
Yong, et al. 2012. Secular versus religious norms against smoking: Which is more important as a driver of quitting behaviour among Muslim Malaysian and Buddhist Thai smokers? [access full article]
Background: This paper prospectively examined two kinds of social normative beliefs about smoking, secular versus religious norms.
Purpose: The purpose of this paper is to determine the relative importance of these beliefs in influencing quitting behaviour among Muslim Malaysian and Buddhist Thai smokers.
Methods: Data come from 2,166 Muslim Malaysian and 2,463 Buddhist Thai adult smokers who participated in the first three waves of the International Tobacco Control Southeast Asia project. Respondents were followed up about 18 months later with replenishment. Respondents were asked at baseline about whether their society disapproved of smoking and whether their religion discouraged smoking, and those recontacted at follow-up were asked about their quitting activity.
Results: Majority of both religious groups perceived that their religion discouraged smoking (78% Muslim Malaysians and 86% Buddhist Thais) but considerably more Buddhist Thais than Muslim Malaysians perceived that their society disapproved of smoking (80% versus 25%). Among Muslim Malaysians, religious, but not societal, norms had an independent effect on quit attempts. By contrast, among the Buddhist Thais, while both normative beliefs had an independent positive effect on quit attempts, the effect was greater for societal norms. The two kinds of normative beliefs, however, were unrelated to quit success among those who tried.
Conclusions: The findings suggest that religious norms about smoking may play a greater role than secular norms in driving behaviour change in an environment, like Malaysia where tobacco control has been relatively weak until more recently, but, in the context of a strong tobacco control environment like Thailand, secular norms about smoking become the dominant force.[download PDF]