The Rest of the Story

The authors of this study make one of the most cardinal errors in all of epidemiology. They ignore the principle that "correlation does not equal causation."

(See: Grana R, Benowitz N, Glantz SA. E-Cigarettes: A Scientific Review. Circulation 2014; 129: 1972-1986.)

F. None of the above.

The Rest of the Story issued a call for a by CDC to clarify this error, but none was forthcoming.

Instead, I think that studies which specifically compare lung cancer risk between lifelong smokers of filtered vs. non-filtered cigarettes during the same time period are most informative regarding the relative cancer risks of these products. And multiple studies along these lines, including recent studies, have reported a slightly decreased risk associated with lifetime smoking of filtered vs. non-filtered cigarettes.

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