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E-cigarettes: an evidence update <br /> <br />60 <br />Figure 18: Perceptions of relative harmfulness of e-cigarettes in comparison with <br />tobacco cigarettes. ASH Smokefree GB youth surveys (2013 and 2014) taken from <br />Eastwood et al., in press[64]. <br /> <br /> <br /> <br />Surveys from the US also suggest that from 2010 to 2013, the proportion of current <br />smokers aware of EC who believed that EC were less harmful than smoking cigarettes <br />declined considerably [65]. Youth in the US appear to have a less realistic perception of <br />the relative harm of EC compared with cigarettes than UK youth. In the 2012 National <br />Youth Tobacco Survey, of those who were aware of EC, around one-third perceived <br />them to be less harmful than cigarettes and around half were unsure [66, 67]. <br /> <br />The ASH Smokefree GB youth survey in 2013 and 2014 further included a question on <br />the harm of EC to persons around a user. Again, the proportion who though t them less <br />harmful than traditional cigarettes decreased from 2013 to 2014 (p<0.05), and the <br />proportion who thought they caused similar levels of harm increased (p<0.01) (Figure <br />19). <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />73.6 <br />11.5 <br />1.2 <br />13.7 <br />66.4 <br />18.2 <br />1.5 <br />13.8 <br />66.7 <br />21.3 <br />2.4 <br />9.6 <br />0 <br />10 <br />20 <br />30 <br />40 <br />50 <br />60 <br />70 <br />80 <br />Less harmful Equally harmful More harmful Don’t know <br />% <br />e <br />n <br />d <br />o <br />r <br />s <br />i <br />n <br />g <br /> <br />r <br />e <br />s <br />p <br />o <br />n <br />s <br />e <br /> <br />2013 <br />2014 <br />2015