Last November, I reported that CDC was by telling us that an agency survey had found that electronic cigarettes are a gateway to smoking. Specifically, I noted that CDC director Dr. Thomas Frieden : "What we are doing first is tracking, and we are seeing some very concerning trends. Use of e-cigarettes in youth doubled just in the past year, and many kids are starting out with e-cigarettes and then going on to smoke conventional cigarettes." However, the CDC was a cross-sectional one and it didn't track e-cigarette users over time to see whether they went on to smoke conventional cigarettes. Thus, Dr. Frieden was lying to the public.

Anecdotes are in fact data. Of course, what you do with that data and how you interpret it is affected by the nature of how the data were obtained. But anecdotes are data. Remember, the connection between smoking and lung cancer itself was first uncovered by a case series. Physicians started to note multiple cases of lung cancer - which was very rare at the time - all occurring in smokers. While these patients could be called "anecdotes," they were also people who provided very real and important data that led to the discovery that smoking causes lung cancer. That connection would not have been found had these "anecdotes" been dismissed.

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