Key result
Exclusive e-cigarette use is linked to lower inflammatory and oxidative stress biomarkers than smoking.
Why the study?
The cardiovascular toxicity of electronic cigarettes is not well understood, and population data assessing their cardiovascular effects are sparse.
Does exclusive e-cigarette use improve inflammatory and oxidative stress biomarkers compared to exclusive cigarette smoking in US adults?
Population
Nationally representative sample of US adults
Comparison
Cigarette and e-cigarette use behaviors
Design
Nationally representative population study
Authors
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Captured external expert commentary on this paper, strongest first. Original sources are linked where available.
“If you're a patient who uses combustible cigarettes and you're interested in a path toward harm reduction or cessation, we find that dual use of both products is not an effective means of reducing risk. If you are going to use e-cigarettes, you should switch completely and you should have a plan in place with your provider for ultimately attaining freedom from all products.”
“This study adds to the limited body of research we have on biologic measures in those using e-cigarettes. I believe it has an important message for individuals who may believe using e-cigarettes while continuing to smoke some combustible cigarettes reduces their risk. This commonly-seen pattern of dual use was not associated with lower levels of inflammatory markers, and thus is not likely to offer a reduction in risk in this specific area.”
“This study is among the first to use nationally representative data to examine the association of cigarette and e-cigarette use behaviors with biomarkers of inflammation and oxidative stress. Given the lag time between tobacco exposure and disease symptoms and diagnosis, identifying the association between e-cigarette use and sensitive biomarkers of subclinical cardiovascular injury is necessary for understanding the long-term effects of newer tobacco products such as e-cigarettes.”
Exclusive e-cigarette substitution may lower biomarker exposure versus smoking; cross-sectional data leaves cardiovascular risk reduction unproven.
Cross-Sectional (n=7,130)
Does exclusive e-cigarette use improve inflammatory and oxidative stress biomarkers compared to exclusive cigarette smoking in US adults?
Effect estimate: GMR 0.91 (95% CI 0.79-1.07)
Completely replacing cigarette smoking with e-cigarettes may reduce exposure to inflammatory and oxidative stress biomarkers, though e-cigarettes alone do not increase these biomarkers compared to non-use.
Stokes et al. (2021) conducted a cross-sectional in General population (n=7,130). Exclusive e-cigarette use vs. Exclusive cigarette smoking and non-use was evaluated on hsCRP (exclusive e-cigarette use vs exclusive smoking) (GMR 0.91, 95% CI 0.79-1.07). Exclusive e-cigarette use was associated with lower levels of most inflammatory and oxidative stress biomarkers compared to exclusive smoking, and showed no difference compared to non-users.
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