Yong HH, Borland R, Cummings KM, et al. - Researchers conducted a cross-sectional study of 2,722 current daily/weekly, and 921 ex-daily/weekly, adult vapers who were either current or ex-cigarette smokers when surveyed in order to assess their reasons for continuing or discontinuing regular use of nicotine vaping products (NVPs). This study was undertaken in the settings of 2016 ITC Four Country Smoking and Vaping wave 1 (4CV1) surveys conducted in the United States (n = 1,159), England (n = 1,269), Canada (n = 964) and Australia (n = 251). The top three reasons reported by current smokers for current regular NVP use were: helpful for cutting down smoking (85.6%), less harmful to others (77.9%) and helpful for quitting smoking (77.4%). Vaping discontinuation was observed mainly in correlation with the following three reasons: not being satisfying (77.9%), unhelpfulness for cravings (63.2%), and unhelpfulness for quitting smoking (52.4%). The top three reasons stated by ex-smokers for current vaping were: enjoyment (90.6%), less harmful to others (90%) and affordability (89.5%); and for discontinuing were: not needed to stay quit (77.3%), not being satisfying (49.5%) and safety concerns (44%). Reported reasons varied by user characteristics, including age, country and NVP device type.