US evidence shows using cigarettes and e-cigarettes worse than either on the respiratory system
Reddy KP, Schwamm E, Kalkhoran S, et al. Respiratory Symptom Incidence among People Using Electronic Cigarettes, Combustible Tobacco, or Both. Am J Respir Crit Care Med. 2021 Apr 15. doi: 10.1164/rccm.202012-4441LE. Epub ahead of print.
Dual use of e-cigarettes and cigarettes doubled the odds of developing respiratory symptoms (aOR 2.22, 95% CI 1.79-2.75). This was a statistically significantly bigger increase in risk than the effects of smoking alone (1OR 1.24, 95% CI 1.00-1.55).
It is also particularly important because dual use was twice as prevalent as people solely using e-cigarettes (2.7% vs 1.4%). In other words, most people who are using e-cigarettes are not “switching completely” from cigarettes, but simply adding e-cigarettes to their cigarette smoking. https://pubmed.ncbi.nlm.nih.gov/33857396/
Stephen Hamann
