On 2016 Dec 07, Peter Hajek commented:

There was no significant association between respiratory symptoms and current vaping when controlling for smoking status, and this is the key analysis which should have been reported, rather than unadjusted results that reflect the fact that most vapers are smokers.

Past experimentation with vaping remained linked to some symptoms but it also significantly reduced wheezing. With the absence of any effects of current vaping, these links are likely to be flukes as there is no obvious mechanism for them. Here is a link to a more detailed critique of the way these findings were reported: http://www.ecigarette-research.org/research/index.php/whats-new/whatsnew-2016/248-bronch

On 2016 Nov 21, MICHAEL SIEGEL commented:

None

On 2016 Nov 21, MICHAEL SIEGEL commented:

None

On 2016 Dec 07, Peter Hajek commented:

There was no significant association between respiratory symptoms and current vaping when controlling for smoking status, and this is the key analysis which should have been reported, rather than unadjusted results that reflect the fact that most vapers are smokers.

Past experimentation with vaping remained linked to some symptoms but it also significantly reduced wheezing. With the absence of any effects of current vaping, these links are likely to be flukes as there is no obvious mechanism for them. Here is a link to a more detailed critique of the way these findings were reported: http://www.ecigarette-research.org/research/index.php/whats-new/whatsnew-2016/248-bronch