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  • Title: Comparison of e-cigarette use characteristics between exclusive e-cigarette users and dual e-cigarette and conventional cigarette users: an on-line survey in France.
    Author: Berlin I, Nalpas B, Targhetta R, Perney P.
    Journal: Addiction; 2019 Dec; 114(12):2247-2251. PubMed ID: 31412149.
    Abstract:
    BACKGROUND AND AIMS: Completely substituting e-cigarettes (EC) for combustible tobacco cigarettes reduces exposure to toxicants and carcinogens. However, a large proportion of EC users (dual users) continue to smoke conventional cigarettes. This study aimed to compare estimated nicotine intake and e-cigarette use characteristics between exclusive EC users and dual users. DESIGN: Web-based anonymous cross-sectional survey. SETTING: France. PARTICIPANTS: A total of 3189 adults, current users of electronic cigarettes (EC). Data collection between 4 October 2014 and 11 November 2014. MEASUREMENTS: Primary outcome: estimated nicotine intake per day (mg) from participants' reports. SECONDARY OUTCOMES: duration, frequency of EC use and nicotine content of e-liquids used/day. Dual use was defined as using at least one cigarette per day while also using EC. FINDINGS: A total of 2836 respondents reported exclusive EC use and 353 reported being dual users. Backward stepwise logistic regression showed that dual users had higher estimated combined daily nicotine intake from e-liquids and cigarettes [estimate: 2.14, standard error (SE) = 0.26, adjusted odds ratio (aOR) = 8.48, 95% confidence interval (CI) = 5.11-14.09, P < 0.001], but lower daily nicotine intake from EC (estimate: -2.14, SE = 0.26, aOR = 0.12, CI = 0.07-0.196, P < 0.001) and reported fewer months of EC use (estimate: -0.31, SE = 0.14, aOR = 0.73, CI = 0.56-0.95, P = 0.022) compared with exclusive EC users. CONCLUSION: Dual e-cigarette users in France may have higher nicotine intake overall than exclusive e-cigarette users, but they may take in less nicotine from their e-cigarettes.
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