Based on these most recent data from the UK, it appears that there just is not evidence to support the wild contentions that anti-smoking groups, advocates, and health agencies like the CDC and World Health Organization are disseminating to the public. Contrary to what Stan Glantz is telling the press, there simply is no evidence that the use of electronic cigarettes is undermining smoking cessation or impeding the decline in smoking prevalence. Nor is there evidence that electronic cigarettes are causing nonsmokers or ex-smokers to return to cigarette smoking. Moreover, there is no evidence that dual use is decreasing the motivation of smokers to quit or precluding these smokers from reaping any health benefits.
There are some specific problems with survey studies that could lead to an overestimation of the benefits of electronic cigarettes. One major problem is that a survey study of the use of advanced vapor products would result in a severe bias towards finding a high level of effectiveness of these products. The reason? By the time smokers advance to use products like open-ended systems, they have already experienced success, fulfillment, and enjoyment with vaping. In other words, limiting the sample to users of advanced vapor products filters out the majority of e-cigarette users, who do not experience great success and therefore don't go on to the more advanced products.
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First, he cites the JAMA Pediatrics article in which Glantz and Dutra conclude that electronic cigarettes are exaggerating, rather than ameliorating smoking among youth. Clive writes: "somehow you have managed to position this study as showing there is a gateway from e-cigarette use to smoking. NOTHING in the study or the underlying data suggests this. You would need information on how smoking, e-cigarette use and abstinence evolved over time to test these hypotheses, but your study does not have that."
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