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E-cigarettes: an evidence update <br /> <br />85 <br />12. International perspectives <br />Overview <br />Internationally, countries have taken a wide variety of approaches to regulating EC <br />[156]. Current approaches range from complete bans on the sale of any EC, to applying <br />existing laws on other products to EC (poison, nicotine, and/or tobacco laws), to <br />allowing EC to be sold under general consumer product regulations. Similarly, within <br />countries, different laws have also been applied at the state/provincial level, along with <br />municipal by-laws, extending into areas including taxes on EC, and bans on use in <br />places where smoking is banned. Furthermore, several nuances in laws exist, making it <br />difficult to make broad statements about the regulations in a given country. This section <br />focuses on presenting (1) studies that have compared the use of EC internationally <br />across countries using representative samples and comparable methods, (2) a brief <br />review of adolescent surveys internationally, and (3) the cases of Australia and Canada, <br />two countries that have very similar tobacco control policies to the UK but very different <br />policies relating to EC. <br /> <br />Use of e-cigarettes among adults internationally <br />Three studies have compared the use of EC internationally: (1) International Tobacco <br />Control Project (described in the Methodology section), (2) Eurobarometer study and (3) <br />Global Adult Tobacco Survey. <br /> <br />The International Tobacco Control Project compared E C use (use defined as less than <br />monthly or more often) among smokers and ex-smokers across 10 countries [157]. <br />Gravely et al., 2014 found significant variability in use across countries, but data were <br />gathered across different years. Gravely et al., 2014 concluded that the study provided <br />evidence of the rapid progression of EC use globally, and that variability was due partly <br />to the year the survey was conducted, but also market factors, including different <br />regulations on EC. Notably, EC use was highest in Malaysia at 14%, whe re a ban on <br />EC was in place. <br /> <br />Two studies using secondary data from the 2012 Eurobarometer 385 survey have <br />examined EC use. Vardavas, et al., 2014 [158] examined ever use (tried once or twice) <br />of EC among smokers, ex-smokers and never smokers aged 15 years and over across <br />27 EU countries. The study found wide variation in ever EC use among smokers and <br />non-smokers, with ever use varying from 20.3% among smokers, 4.4% among ex- <br />smokers, and 1.1% among never smokers. Of those who had tried, 69.9% reported <br />using EC once or twice, and 21.1% and 9% reported ever using or currently using <br />occasionally or regularly (use or used regularly or occasionally). It is important to note <br />that the question asked about ever using or currently using occasionally or regularly,