In this cross-sectional study of grade 9 students in the Niagara region of Ontario, reported use of e-cigarettes was common and associated with potential risk factors, including exposure to use of tobacco by family members and friends, and personal tobacco use. Most teens reported trying e-cigarettes because it was cool/fun/new rather than for smoking reduction or cessation.Dr. Michael Khoury, paediatric cardiology resident at the Hospital for Sick Children in Toronto, discusses the CMAJ research article he co-authored.Full research article: https://www.cmaj.ca/lookup/doi/10.1503/cmaj.151169To request a transcript of this podcast, contact cmajgroup@cmaj.caSubscribe to CMAJ Podcasts on Apple Podcasts or your favourite podcast app. You can also follow us directly on our SoundCloud page or you can visit www.cmaj.ca/page/multimedia/podcasts.