• Ralph S Caraballo, Ahmed Jamal, Kimberly H Nguyen, Nicole M Kuiper, and René A Arrazola.
• Office on Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion, CDC, Atlanta, Georgia. Electronic address: rfc8@cdc.gov.
• Am J Prev Med. 2016 Feb 1; 50 (2): 226-9.

IntroductionElectronic nicotine delivery system (ENDS) use has increased rapidly in the U.S. in recent years. The availability and use of ENDS raise new issues for public health practice and tobacco regulation, as it is unknown whether patterns of ENDS use enhance, deter, or have no impact on combustible tobacco product use. This study assessed past-month, lifetime, and frequency of ENDS use among current, former, and never adult cigarette smokers.MethodsData were analyzed from the 2014 Styles, a national consumer-based probability-based web panel survey of U.S. adults aged ≥18 years (n=4,269) conducted during June and July. Lifetime ENDS users were defined as those who reported having used ENDS ≥1 day in their lifetime. Past-month ENDS users were defined as those who reported using ENDS in the past 30 days.ResultsIn 2014, overall lifetime and past-month ENDS use was 14.1% and 4.8%, respectively. By smoking status, 49.5% of current, 14.7% of former, and 4.1% of never cigarette smokers had used ENDS in their lifetime, whereas 20.6% of current, 4.0% of former, and 0.8% of never smokers used ENDS in the past month. Among current and former cigarette smokers who ever used ENDS, 44.1% and 44.7% reported using ENDS >10 days in their lifetime, respectively.ConclusionsBecause the effect ENDS use has on combustible tobacco products use is unknown, and lifetime and past-month ENDS use is more common among current than former or never smokers, continued surveillance of ENDS use among adults is critical to programs and policies.Published by Elsevier Inc.

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