Berlin I, et al. - Researchers conducted a web-based anonymous cross-sectional survey among 3,189 current users of electronic cigarettes (EC) to compare estimated nicotine intake and e-cigarette use features between exclusive EC users and dual users. A total of 2,836 respondents reported exclusive use of EC and 353 reported dual use. According to backward stepwise logistic regression, dual users had higher estimated combined daily nicotine intake from e-liquids and cigarettes, but lower daily nicotine intake from EC, and reported fewer months of EC use vs exclusive EC users. In France, dual e-cigarette users may have a higher overall consumption of nicotine than exclusive e-cigarette users, but their e-cigarettes may take less nicotine.