Evaluating the Impact of Menthol Cigarette Bans On
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Original research Tob Control: first published as 10.1136/tobaccocontrol-2020-056259 on 5 April 2021. Downloaded from Evaluating the impact of menthol cigarette bans on cessation and smoking behaviours in Canada: longitudinal findings from the Canadian arm of the 2016–2018 ITC Four Country Smoking and Vaping Surveys Janet Chung- Hall ,1 Geoffrey T Fong ,1,2,3 Gang Meng,1 K Michael Cummings ,4 Andrew Hyland,5 Richard J O’Connor,5 Anne C K Quah ,1 Lorraine V Craig 1 ► Additional material is ABSTRACT progression to regular smoking among new smokers, 6 7 published online only. To view Objective To evaluate the impact of menthol cigarette especially those who are younger. please visit the journal online bans in seven Canadian provinces between 2016 and Independent scientific reviews conducted by the (http:// dx. doi. org/ 10. 1136/ 2 tobaccocontrol- 2020- 056259). 2018. Tobacco Products Scientific Advisory Committee, Methods Longitudinal data from the Canadian arm the US Food and Drug Administration8 and the 1 Psychology, University of of the 2016 and 2018 ITC Four Country Smoking and WHO Study Group on Tobacco Product Regu- Waterloo, Waterloo, Ontario, Vaping Survey. 1098 non- menthol and 138 menthol 9 Canada lation have all concluded that the removal of 2School of Public Health and smokers were surveyed pre- menthol and post- menthol menthol from cigarettes would have significant Health Systems, University of cigarette bans. Multivariate logistic regression models public health benefits, and recommended a ban on Waterloo, Waterloo, Ontario, examined associations between pre- post ban changes menthol cigarettes. Canada in smoking behaviour, including differences between 3Ontario Institute for Cancer Canada was one of the first countries in the world Research, Toronto, Ontario, menthol and non- menthol smokers in quit attempts and to introduce bans on menthol cigarettes. Between Canada quitting. May 2015 and July 2017, 7 out of 10 Canadian copyright. 4 Psychiatry & Behavioral Results At follow- up, 59.1% of pre- ban menthol provinces implemented menthol cigarette bans.10 Sciences, Medical University smokers switched to non- menthol cigarettes; 21.5% quit A federal ban on menthol (including all analogues of South Carolina, Charleston, smoking and 19.5% still smoked menthols, primarily South Carolina, USA and derivatives) in cigarettes, most cigars and blunt 5Health Behavior, Roswell Park purchased from First Nations reserves. Menthol smokers wraps came into force in October 2017.11 Nation- Comprehensive Cancer Center, were more likely than non- menthol smokers to make a wide menthol cigarette bans have also been imple- Buffalo, New York, USA quit attempt (adjusted OR (aOR)=1.61, 95% CI 1.03 mented in Ethiopia (September 2015), Senegal to 2.51), and to remain quit (aOR=2.30, 95% CI 1.06 (May 2017), Uganda (September 2019), Nigeria http://tobaccocontrol.bmj.com/ Correspondence to to 5.01). Menthol smokers did not differ significantly Dr Janet Chung- Hall, (April 2020), Moldova (May 2020), Turkey (May from non- menthol smokers in quit success (aOR=1.72, Psychology, University of 2020) and the European Union (May 2020). 95% CI 0.98 to 3.01); however, daily menthol smokers Waterloo, Waterloo, Canada; Researchers have used different methods to eval- were more likely than daily non- menthol smokers to quit jchunghall@ uwaterloo. ca uate the potential impact of a menthol cigarette (aOR=2.21, 95% CI 1.15 to 4.24), and daily menthol ban, including surveys to assess smokers’ intended Received 24 September 2020 smokers who quit before the ban were more likely than Revised 6 March 2021 behaviour in response to a hypothetical menthol daily non- menthol smokers to remain quit (aOR=2.81, Accepted 13 March 2021 ban, simulation modelling and experimental 95% CI 1.15 to 6.85). switching of menthol smokers to non-menthol ciga- Conclusions Although menthol smokers were most rettes.12–14 However, few population- level studies likely to switch to non- menthol cigarettes, the menthol ban was also significantly associated with higher rates of have evaluated the actual effects of implemented on September 25, 2021 by guest. Protected quit attempts and quit success among menthol smokers menthol cigarette bans. compared with non- menthol smokers, and may have Research from the Canadian province of Ontario helped to prevent relapse among menthol smokers provides the best available evidence for the public who had quit smoking before the ban. Results confirm health impact of a real- world menthol cigarette and extend evaluation of Ontario’s menthol ban across ban to date. After Ontario banned menthol ciga- © Author(s) (or their provinces covering 83% of the Canadian population. rettes, sales of menthol cigarettes and all cigarettes employer(s)) 2021. Re- use in Ontario declined to approximately zero and by permitted under CC BY- NC. No 11%, respectively, compared with no changes in commercial re- use. See rights British Columbia (no provincial menthol ban).15 and permissions. Published by BMJ. INTRODUCTION Daily menthol smokers in Ontario were also more Menthol was first added as a characterising flavour likely than non- menthol smokers to make quit To cite: Chung- Hall J, to cigarettes in the USA in the 1920s, and is still attempts (63.0% vs 43.0%) and quit smoking Fong GT, Meng G, et al. 16 Tob Control Epub ahead of the most common flavouring for cigarettes in many (24.0% vs 14.0%) after the ban. Another study 1–3 print: [please include Day countries. Menthol creates a cooling sensation found that 29.1% of menthol smokers made a Month Year]. doi:10.1136/ that reduces the harshness of cigarette smoke,4 5 post- ban quit attempt.17 Some studies have found tobaccocontrol-2020-056259 thereby leading to increased experimentation and that menthol smokers switched to other products. Chung- Hall J, et al. Tob Control 2021;0:1–8. doi:10.1136/tobaccocontrol-2020-056259 1 Original research Tob Control: first published as 10.1136/tobaccocontrol-2020-056259 on 5 April 2021. Downloaded from One study found that 29.0% of menthol smokers reported using at Wave 2. A cohort of 850 newly recruited adult smokers was other flavoured tobacco or e- cigarettes after Ontario’s menthol also included at Wave 2. Sampling weights were calibrated to cigarette ban.17 Another Ontario study found that daily menthol benchmarks from national surveys to ensure that data are repre- cigarette smokers were more likely to use other tobacco prod- sentative of the adult smoker and vaper population in Canada. ucts, flavoured tobacco products and flavoured cigars after a Data were collected online, and respondents were remunerated. menthol cigarette ban.18 Methodological details are described elsewhere21–25 and avail- An important design element of a 2019 evaluation of Ontar- able online (http://www. itcproject. org/ methods). io’s 1 January 2017 menthol ban on smoking cessation was the 16 comparison of menthol smokers to non- menthol smokers. Measures This study controlled for the potential influence of two events— Pre-ban smoking status New Year’s resolutions and National Non- Smoking Week in Smokers were defined as those who had smoked at least 100 19 20 Canada—which are both known to increase quitting. The cigarettes in their lifetime and currently smoked cigarettes at present study examined the impact of a menthol cigarette ban least monthly. At Wave 1, smokers were asked whether they in Ontario, but also in six other provinces, where bans were had a usual brand of cigarettes. Respondents were then asked implemented at other times of the year, thereby allowing for to identify the flavour of their usual brand or the brand they policy evaluation across a broader range of Canadian provinces last purchased. Respondents who selected ‘tobacco and menthol’ and implementation dates than the January implementation in flavour were categorised as menthol smokers, and those who Ontario. selected ‘just tobacco’ or ‘tobacco and some other flavour’ were Evaluating the impact of a menthol ban is critical to inform categorised as non- menthol smokers. regulatory actions that would maximise public health benefits and minimise any negative unintended consequences in other Post-ban smoking status jurisdictions. This longitudinal cohort study is the first to eval- At Wave 2, respondents were asked to identify the flavour of uate the impact of menthol cigarette bans on smoking behaviour their usual cigarette brand or the brand they last purchased. and smoking cessation among adult smokers in seven Canadian Respondents were categorised into one of three types of provinces. post- ban product use for analyses: (1) currently not smoking, (2) currently smoking menthol cigarettes and (3) currently smoking METHODS non- menthol cigarettes. Participants and sampling Data are from Wave 1 (2016) and Wave 2 (2018) of the ITC Four Post-ban purchase of menthol cigarettes Country Smoking and Vaping (4CV) Survey. In brief, the ITC copyright. Post- ban menthol smokers were asked to report where they last 4CV Survey retained participants from the original ITC Four purchased menthol cigarettes for personal use. Figure 2 provides Country Survey of nationally representative samples of adult all response categories. smokers (aged 18+ years) in Australia, Canada, the UK and the USA (2002–2014) who met eligibility criteria, and recruited new participants who were current smokers, former smokers (quit Post-ban cessation behaviours ≤2 years) or current vapers from country- specific panels. Quit attempts were assessed by asking current smokers who Figure 1 presents the timeline of menthol cigarette bans in each reported ever making a quit attempt: ‘In the last 18 months, have http://tobaccocontrol.bmj.com/ of the seven provinces evaluated and pre- post ban survey dates. you tried to stop smoking?’ Responses were coded as ‘yes’ and The ITC 4CV Wave 1 Survey was conducted in Canada from July ‘no’. Responses ‘refused’ and ‘don’t know’ were excluded from to November 2016, before the implementation of menthol ciga- analysis.