Association of Electronic Cigarette Use With Smoking Habits, Demographic Factors, and Respiratory Symptoms

Key Points Question Who uses electronic cigarettes (e-cigarettes), and is there an association between e-cigarette use and respiratory symptoms? Findings In a random sample of more than 30 000 Swedish adults, e-cigarette use was most common among current smokers, and the prevalence of respiratory symptoms was highest among the current smokers who also used e-cigarettes. Meaning Longitudinal studies will be essential to further determine the long-term health effects of e-cigarette use and whether in dual users it increases the burden of respiratory conditions or encourages sustainable smoking cessation.

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