Dr Siegel's comments about this study: http://tobaccoanalysis.blogspot.com/2014/09/new-study-claims-to-have-found-that-e.html
Dr Siegel's comments about this study: http://tobaccoanalysis.blogspot.com/2014/09/new-study-claims-to-have-found-that-e.html
Dr Siegel's comments about this study: http://tobaccoanalysis.blogspot.com/2014/09/new-study-claims-to-have-found-that-e.html
The methodology used reminds me of High School chemistry labs.
Everyone knew what the results were supposed to be and you fudged the numbers doing the experiments so it came out "correct"
When the authors describe their methods for analysis:
"Abstinence rates were calculated with 2 methods for handling missing data: 1) a modified intent-to-treat (ITT) analysis, assuming all participants lost to follow-up were smoking; and 2) complete case analysis (CCA), in which participants lost to follow-up were eliminated from the analysis. Consistent with recommendations for handling missing data when reporting cessation outcomes, we report both ITT and CCA results because they represent, respectively, the full range of conservative and liberal interpretations of smoking abstinence outcomes." [No it doesn't represent the "full range" as you point out]
So if they analyzed the data by including all who dropped from the study and assuming they still smoked, and by not including those who dropped at all... then why didn't they conduct an analysis including those who dropped from the study assuming they all quit???
Oh yeah... because that would have distorted their results, making it impossible for them to come to a clear-cut, undeniable conclusion. If they had run this analysis, since so many who dropped from the study were vapers, it would have suggested that vaping helps people quit smoking. But that's not the angle they were going for...
And, of course, at various points throughout the study when discussing their results it is very unclear which analysis they are referring to.
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