title: Factors associated with experimentation of electronic cigarettes among Parisian teenagers in 2013.
abstract: BACKGROUND
  Electronic cigarettes (e-cig.) became widely used among adults. Data are insufficient about e-cig. experimentation among youth.
  
  
  METHODS
  To assess prevalence of e-cig. experimentation and associated factors among the 12 to 19 years old we analyse a cross sectional school based survey in the city of Paris, France in 2013 on a randomly selected sample of 2 % of schoolchildren (n = 3 279). Self-report questionnaire include demographic, individual and family smoking characteristics and questions about e-cig: "Have you ever used an e-cigarette?"- "Did you use e-cigarette in the last 30 days?"-"Did you try e-cigarette as a first tobacco product?".
  
  
  RESULTS
  In 2013, 17.9 % (564) schoolchildren reported having experienced the e-cig (boys: 19.0 %, girls: 16.8 %) compared to 9.8 % in 2012. Experimentation rate increases from 5 % among the 12 to 30 % among the 16-year-old. E-cig. experimentation was significantly associated with 11 parameters including : age >15 years (OR: 0.66 (IC95 % = 0.46-0.94)); smoking 10 cigarettes or more (OR = 5.67 (IC95 % = 3.11-10.34)), best friends and siblings smoker (OR = 1.54 (IC95 % = 1.11-2.14)) and (OR = 1.88 (IC95 % = 1.41-2.52)); experimentation of shisha (OR = 2.60 (IC95 % = 1.75-3.86)), cannabis use (OR = 1.90 (IC95 % = 1.32-2.72)); having two parents who forbid smoking (OR = 2.32 (IC95 % = 1.63-3.30)). Only 5.6 % of the study population (and 32.5 % of e-cig. experimenters (183/564)) have used it in the last 30 days; 1.7 % of the study population and 10.0 % of e-cig. experimenters were non-smokers (56/564).
  
  
  CONCLUSIONS
  Rate of e-cig. experimentation among schoolchildren increased by 8.1 % in 1 year. Non-smoking youth may use e-cig. Prospective studies are urgently needed to assess the evolution of e-cig. use both among smoking and non-smoking youth.
authors.affiliation: Paris Sans Tabac (PST), Paris, France ; University Hospital Pitié Salpêtrière-Charles Foix (APHP), Paris, France ; Université Pierre et Marie Curie (upmc), Faculté de médecine, Paris, France ; Service de pneumologie - Hôpitaux universitaires Pitié Salpêtrière-Charles Foix, 91 Bd de l'Hôpital, 75651 Paris Cedex 1, France.
authors.forename: Bertrand
authors.initials: B
authors.lastname: Dautzenberg
authors.affiliation: University Hospital Pitié Salpêtrière-Charles Foix (APHP), Paris, France ; Université Pierre et Marie Curie (upmc), Faculté de médecine, Paris, France.
authors.forename: Ivan
authors.initials: I
authors.lastname: Berlin
authors.affiliation: University Hospital Pitié Salpêtrière-Charles Foix (APHP), Paris, France.
authors.forename: Marie-Laure
authors.initials: ML
authors.lastname: Tanguy
authors.affiliation: Rectorat Académie de Paris, Paris, France.
authors.forename: Nicole
authors.initials: N
authors.lastname: Rieu
authors.affiliation: Paris Sans Tabac (PST), Paris, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Birkui
keywords: Electronic cigarette; Survey; Teenagers