The information emerged in documents obtained under Freedom of Information laws by the ABC.

Fortunately, there is a simple way to evaluate this hypothesis, at least on a preliminary basis, prior to waiting for the results of longitudinal studies. Enough youth are experimenting with electronic cigarettes, and the increase in youth e-cigarette use has been dramatic and sustained enough, that if the gateway hypothesis were correct, we would be starting to see an increase in smoking prevalence among youth due to the many new smoking initiates that were converted from e-cigarette experimentation to smoking.

In summary, the rules state:

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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