The study involves a survey of 949 adult smokers who were interviewed at baseline in 2011 and followed up one year later. Of these smokers, at baseline, 88 had tried electronic cigarettes in the past month (that is, they had used electronic cigarettes at least once).

One possible answer appears in Wride's column. She writes:

The truth is that this paper provides no evidence whatsoever that e-cigarette use is a gateway to smoking. Instead, it is entirely possible - and quite likely - that youths who use e-cigarettes are more likely to be heavier and more resistant smokers.

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