Editor’s note: On March 29, 2024, the authors of the study, “Efficacy of Electronic Cigarettes vs Varenicline and Nicotine Chewing Gum as an Aid to Stop Smoking: A Randomized Clinical Trial,” published in JAMA Internal Medicine, issued a formal retraction of their article. The CHEST Physician Editorial Board apologizes for any confusion this may have caused.
An article in the April issue of the CHEST Physician publication headlined, “E-cigarettes beat nicotine gum for smoking cessation,” was based on an article in JAMA Internal Medicine by Liu Z and colleagues which was subsequently retracted by the author due to coding errors and discrepancies in calculations that cast doubt on the accuracy and reliability of the reported findings.
One should be cautious in evaluating claims of the benefits of electronic cigarettes (e-cigarettes). e-Cigarettes are a highly addictive and largely unregulated product. The fine print in previous clinical trials of e-cigarettes shows greater rates of stopping nicotine products—including e-cigarettes—in the groups assigned to recommendation for nicotine replacement therapy. e-Cigarettes have substantial acute and chronic harms.
Although much of the research to date is from animal models, there is a growing body of evidence in humans that validates the findings from the animal models. In laboratory animal models, e-cigarettes impair airway defenses, contribute to epithelial dysfunction, lead to apoptosis of airway cells, cause emphysematous changes, and lead to increased cancer rates.
Adverse effects on cardiovascular health have also been demonstrated. There is evidence of genotoxicity from e-cigarette exposure, with increased rates of DNA damage and decreased rates of DNA repair. Carcinogenic substances are present in e-cigarettes, and we may not see the carcinogenic effects in humans for several years or even decades. Commonly used flavoring chemicals have substantial pulmonary toxicity. There is evidence that the dual use of e-cigarettes and combustible tobacco can be more harmful than the use of combustible tobacco alone, as the person who smokes is now exposed to additional toxins unique to the e-cigarette.
E-cigarettes can cause severe acute lung disease; 14% of the severe e-cigarette or vaping product use-associated lung injury (EVALI) cases reported use of only nicotine-containing e-cigarette products. There are reports of people who used e-cigarettes who required lung transplant due to complications of their e-cigarette use.
The tobacco industry has a long history of “harm reduction” products that were anything but—from filter cigarettes (the “advanced” Kent Micronite filter contained asbestos) to the so-called low tar and nicotine cigarettes (which were no less harmful). There is a long history of physicians endorsing these products as “must be better.” The growing evidence that e-cigarettes carry distinct health risks of their own should prompt us to consider a broader picture beyond just comparing them with traditional cigarettes to assess their impact on health.
Physicians treating tobacco dependence should recommend US Food and Drug Administration-approved medications for pharmacotherapy. These have a robust evidence base documenting that they help people who smoke to break free of nicotine addiction. The goal of tobacco dependence treatment should be stopping ALL harmful tobacco/nicotine products—including e-cigarettes—not simply changing from one harmful product to another.
References
1. Liu Z. Notice of retraction: Lin HX et al. Efficacy of electronic cigarettes vs varenicline and nicotine chewing gum as an aid to stop smoking: a randomized clinical trial. JAMA Intern Med. 2024;184(3):291-299. JAMA Intern Med. Preprint. Posted online March 29, 2024. PMID: 38551593. doi: 10.1001/jamainternmed.2024.1125
2. Farber HJ, Conrado Pacheco Gallego M, Galiatsatos P, Folan P, Lamphere T, Pakhale S. Harms of electronic cigarettes: what the healthcare provider needs to know. Ann Am Thorac Soc. 2021;18(4):567-572. PMID: 33284731. doi: 10.1513/AnnalsATS.202009-1113CME
3. Proctor RN. Golden Holocaust: Origins of the Cigarette Catastrophe and the Case for Abolition. University of California Press; 2011.
4. Auer R, Schoeni A, Humair JP, et al. Electronic nicotine-delivery systems for smoking cessation. N Engl J Med. 2024;390(7):601-610. PMID: 38354139. doi: 10.1056/NEJMoa2308815
5. Hajek P, Phillips-Waller A, Przulj D, et al. A randomized trial of e-cigarettes versus nicotine-replacement therapy. N Engl J Med. 2019;380(7):629-637. Preprint. Posted online January 30, 2019. PMID: 30699054. doi: 10.1056/NEJMoa1808779