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The Hajek study used intended quit- by- any -means volunteers, removed dual users and tossed a coin (randomized) the remaining volunteers into two groups all of whom were offered the standard UK 12 week NHS counselling with their allocated pharmaceuticals (NRT group) or tank system e-cig. Varenicline or Chantix use with counselling were excluded from the Hajek study.
The study authors did not reveal the brand names of the volunteers’ cigarettes or nicotine yield content as provided in a Canada Intense smoking test report to show realistic smoker intake levels per brand. As the volunteer nicotine intake starting point
The patches supplied in UK are 7, 14 or 21mg and cannot be adjusted by the user.
The tank system group was encouraged to seek out and use e-juice that best suited their flavour choice or nicotine yield requirement.
Flavored e-juice at 36ml nicotine per mL is easily available and accessible online in UK or DIY mixes.

The study authors might have considered a control (NRT group) E-cig choose-- your –own- blend- and- strength group, Varenicline group, JUUL group and another name brand closed pod system e-cig group – all with counselling …. But they didn’t

The timeframe of the Hajek study beyond a couple of phone calls over 9 months leaves many questions of what actually happened in the two groups.

Varenicline with counselling – stunning results at 6 months abstention vs control
https://bmjopen.bmj.com/content/6/1/e009381
Effectiveness of Varenicline and counselling for smoking cessation in an observational cohort study in China

https://www.nejm.org/doi/10.1056/NEJMoa1808779
Hajek et al - A Randomized Trial of E-Cigarettes versus Nicotine-Replacement Therapy

https://www.nejm.org/doi/full/10.1056/NEJMe1816406?query=recirc_curatedR...
Editorial NEJM on above Hajek study
E-Cigarettes to Assist with Smoking Cessation
• Belinda Borrelli, Ph.D.,
• and George T. O’Connor, M.D.

It seems UK academics are unable to find the study by (E-cig supporter) West et al which monitored 200,000 UK e-cig users over a ten year period, and the study outcome
https://bmjopen.bmj.com/content/8/6/e016046
Beard E, et al. BMJ Open 2018;8:e016046. doi:10.1136/bmjopen-2017-016046
Is prevalence of e-cigarette and nicotine replacement therapy use among smokers associated with average cigarette consumption in England? A
time-series analysis

We have yet to find any electronic cigarette product /nicotine e-juice which has been tested and certified by any worldwide Government as a smoking cessation / harm reduction product, yet
the UK especially continues to promote these untried untested paraphernalia with a growing list of pathogenic harms and , explosions.

One of the Hajek study co-authors issued this study: (Dawkins)
http://www.lsbu.ac.uk/about-us/news/ex-smokers-vaping-trial-nicotine-e-cigs
“Results of a new E-cig trial carried out by researchers at LSBU show that vapers using low nicotine e-cigarettes puff harder, for longer and more often, inhaling more cancer-causing chemicals”

Yet the Hajek study shows the E-cig cohort of the study was apparently still 80% addicted to e-cigs and nicotine at one year follow-up, and ergo ’inhaling more cancer causing chemicals”

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