While the O'Connor et al survey/study reported some positive findings about e-cigarette use, the study also failed to cite and/or show some potentially critically important data.
For example, the study's authors stated 11% of ENDS users had quit smoking, and that it was similar to the percentage of non ENDS users who had quit smoking. But virtually no ENDS users (perhaps 1 and no more than 2) were classified as "long term quitters", while a far greater number and percentage (neither of which was revealed by the authors) of "long term quitters" had never tried ENDS and weren't current users of ENDS.
Thus, its likely that "long term quitters" accounted for most (or virtually all) of the approximately 11% of the non ENDS users who the authors claimed had quit smoking. On other words, had "long term quitters" (virtually none of whom reported any use of e-cigs) been excluded from this study, the 11% of ENDS users who quit smoking would have been greater (and perhaps 2, 3, 4 or more times greater) than the percentage of non ENDS users who reported quitting smoking.
