E-cigarettes an evidence update A report commissioned by Public Health England

E-cigarettes: an evidence updateo I use them often (more than once a week)o Don’t want to sayInternet cohort surveyHave you ever heard of electronic cigarettes or e-cigarettes? These are electronicdevices that contain nicotine in a vapour and are designed to look like cigarettes, butcontain no tobacco.Yes/No/Don’t knowIf Yes, Have you ever tried an electronic cigarettes?Yes/No/Don’t knowIf Yes, How often if at all, do you currently use an electronic cigarette? (PLEASESELECT ONE OPTION)1. Daily2. Less than daily, but at least once a week3. Less than weekly, but at least once a month4. Less than monthly5. Not at all6. Don’t knowOther studiesAmrock et al., 2015 (US)Which of the following tobacco products have you ever tried, even just one time?” towhich they could select, “electronic cigarettes or e-cigarettes, such as Ruyan or NJOY”alongside other tobacco products. A related question asked if students used e-cigarettes on at least one of the past 30 days.Biener & Hargraves, 2014 (US)At baseline, three questions were asked about e-cigarettes: whether the respondenthad “ever heard of electronic cigarettes, also known as e-cigarettes”; if so, whetherhe/she had ever used an e-cigarette even one time, and if so, on how many of the past30 days the respondent had used an e-cigarette. To assess how intensively and for howlong the respondent had used e-cigarettes during the period between interviews, thefollow-up interviews included questions to describe e-cigarette usage. Those who werenot aware of e-cigarettes at baseline were asked if they had heard of them at follow-up.Those who had not tried e-cigarettes at baseline were asked if they had done so byfollow-up. All respondents who reported ever trying them by follow-up were asked101