Clive Bates
This paper turned up in my weekly search of PubMed.
Invalidity of an Oft-Cited Estimate of the Relative Harms of Electronic Cigarettes.
Eissenberg T, Bhatnagar A, Chapman S, Jordt SE, Shihadeh A, Soule EK.
Am J Public Health. 2020 Feb;110(2):161-162. doi: 10.2105/AJPH.2019.305424.
The commentary claims to show the “invalidity” of the statements made by Public Health England (PHE) and the Royal College of Physicians (RCP) regarding the relative risk of vaping and smoking – in short that vaping is likely to be at least 95% lower risk than smoking. As this is an important harm-reduction risk communication, it is worth asking: how valid is this critique?
I thought this might be a better critique than it actually is. But somewhat to my surprise, it is very poor indeed.
Short version: At best, the authors try to show the absolute risk of vaping is not zero and that some harm is plausible. In doing so, they are refuting a claim that neither PHE or RCP make and an argument not used by anyone sensible in tobacco harm reduction. However, not a single word of their paper addresses the supposed foundation of their critique – that PHE/RCP are wrong and the risks of vaping are likely to exceed five per cent of those of smoking. As well as a number of baseless assertions that are not even relevant to the “at least 95 per cent lower” relative risk claim (gateway effects, smoking cessation efficacy and second-hand aerosol exposure), there is just nothing in the paper about the relative magnitude of smoking and vaping risks. No analysis, no data, no evidence – nothing that discusses relative risk and why PHE/RCP are supposedly wrong. Niente. Nada. Rien. Nichts. Nothing.
Anyway, despite being an empty and feeble piece of work, it does provide an opportunity to discuss some of the issues raised, so I will proceed with a critique. >>> read the full post
