"In summary, the rules state:

Interestingly, it is also possible that electronic cigarettes could have exactly the opposite effect. It is possible that some youths who might have initiated smoking will instead try electronic cigarettes. Further, it is plausible that after using electronic cigarettes, youth may be much less likely to progress to cigarette smoking because compared to the taste and sensation of vaping, the experience of cigarette smoking will not be appealing.

Yesterday, I explained that the of electronic cigarettes by Stan Glantz and colleagues published this week in the journal Circulation is because it draws conclusions about the efficacy of e-cigarettes for smoking cessation from studies that were not designed to measure such effects in the first place. These studies did not examine smoking cessation rates among a cohort of smokers who were identified at baseline as using e-cigarettes with the intention of quitting smoking. Moreover, smokers who use e-cigarettes are likely more heavily addicted to nicotine and may be more resistant to quitting, thus making inferences about cessation effectiveness from these studies inappropriate.

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