But the truth is more nuanced. While there is no question that low-tar or "light" cigarettes are not safer, it is not the case that the introduction of filters made cigarettes more carcinogenic. I would not be able to testify in a courtroom that I believe filtered cigarettes are more dangerous than non-filtered cigarettes. Nor would I be able to testify that filtered cigarettes and non-filtered cigarettes pose equivalent cancer risk.

The study enrolled 1,074 patients with cancer who were smokers and were therefore referred to a tobacco treatment program at a comprehensive cancer center during the years 2012 and 2013. Smoking status, nicotine dependence, and e-cigarette use was assessed at baseline and the patients were followed for six-month. The primary outcome was smoking cessation, measured as seven-day abstinence at follow-up.

Today, I express my opinion that the use of these studies to draw conclusions about the efficacy of e-cigarettes for smoking cessation is not just unscientific, but dishonest as well.

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