• Sally Dunlop, Claudine Lyons, Anita Dessaix, and David Currow.
• Cancer Institute NSW, Sydney, NSW sally.dunlop@cancerinstitute.org.au.
• Med. J. Aust. 2016 May 16; 204 (9): 355.

ObjectivesTo explore how and why tobacco smokers and recent quitters in NSW use e-cigarettes, as well as common places of purchase.DesignThe Cancer Institute Tobacco Tracking Survey is a serial cross-sectional telephone survey, with 40 interviews in NSW each week.Participants2966 tobacco smokers and recent quitters (in the past 12 months) interviewed January 2014 - June 2015.MeasuresCurrent e-cigarette use; reasons for using; places of purchase.Results9% of the sample reported currently using e-cigarettes; the rate was highest among 18-29-year-old people (16%). Infrequent use (less than weekly; 57%) was more common than frequent use (at least weekly; 43%). Frequent use was more likely among older adults (55 years and older v 18-29 years: adjusted odds ratio [aOR], 4.43; P = 0.002) and less likely among current tobacco smokers (v recent quitters: aOR, 0.38, P = 0.020). The most common reasons for using e-cigarettes by those over 30 years of age was "to help me quit" (42%) and to "cut down" smoking (35%); for younger adults it was "because they are not as bad for your health as cigarettes" (25%). Common places of purchase were the internet (29%) and tobacconists (27%).ConclusionsAlthough use of e-cigarettes by tobacco smokers in NSW remains low, some are using e-cigarettes in attempts to reduce tobacco-related harm. Physicians and public health campaigners should inform smokers about the risks associated with dual e-cigarette and tobacco use, advise interested quitters that e-cigarettes are currently unregulated as cessation aids, and continue to provide evidence-based recommendations and cessation services to smokers wanting to quit.

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