title: Electronic cigarette use among adult population: a cross-sectional study in Barcelona, Spain (2013-2014).
abstract: OBJECTIVE
  This study seeks to analyse the prevalence and correlates of electronic cigarette (e-cigarette) use, purchase location and satisfaction with its use in a sample of the general population of the city of Barcelona, Spain.
  
  
  METHODS
  We used participants from a longitudinal study of a representative sample of the adult (≥16 years old) population of Barcelona (336 men and 400 women). The field work was conducted between May 2013 and February 2014. We computed the prevalence, adjusted odds ratios (ORs) and their corresponding 95% confidence interval (CI).
  
  
  RESULTS
  The prevalence of ever e-cigarette use was 6.5% (95% CI 4.7% to 8.3%): 1.6% current use, 2.2% past use and 2.7% only e-cigarette experimentation. 75% (95% CI 62.8% to 87.3%) of ever e-cigarette users were current cigarette smokers at the moment of the interview. E-cigarette use was more likely among current smokers (OR=54.57; 95% CI 7.33 to 406.38) and highly dependent cigarette smokers (OR=3.96; 95% CI 1.60 to 9.82). 62.5% of the ever users charged their e-cigarettes with nicotine with 70% of them obtaining the liquids with nicotine in a specialised shop. 39.6% of ever e-cigarette users were not satisfied with their use, a similar percentage of not satisfied expressing the smokers (38.9%) and there were no statistically significant differences in the satisfaction between the users of e-cigarettes with and without nicotine.
  
  
  CONCLUSIONS
  E-cigarette use is strongly associated with current smoking (dual use) and most users continue to be addicted to nicotine. Six out of 10 e-cigarette users preferred devices that deliver nicotine. The satisfaction with e-cigarette use is very low.
authors.affiliation: Tobacco Control Unit, Cancer Prevention and Control Program, Institut Català d'Oncologia, L'Hospitalet de Llobregat, Barcelona, Spain Cancer Prevention and Control Group, Institut d'Investigació Biomèdica de Bellvitge-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain Biostatistics Unit, Department of Basic Sciences, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona, Spain Public Health Advocacy Institute, Northeastern University School of Law, Boston, Massachusetts, USA.
authors.forename: Jose M
authors.initials: JM
authors.lastname: Martínez-Sánchez
authors.affiliation: Tobacco Control Unit, Cancer Prevention and Control Program, Institut Català d'Oncologia, L'Hospitalet de Llobregat, Barcelona, Spain Cancer Prevention and Control Group, Institut d'Investigació Biomèdica de Bellvitge-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain Department of Clinical Sciences, Universitat de Barcelona, Barcelona, Spain Addictions Unit, Institute of Neurosciences, Hospital Clínic de Barcelona-IDIBAPS, Barcelona, Spain.
authors.forename: Montse
authors.initials: M
authors.lastname: Ballbè
authors.affiliation: Tobacco Control Unit, Cancer Prevention and Control Program, Institut Català d'Oncologia, L'Hospitalet de Llobregat, Barcelona, Spain Cancer Prevention and Control Group, Institut d'Investigació Biomèdica de Bellvitge-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain Department of Clinical Sciences, Universitat de Barcelona, Barcelona, Spain.
authors.forename: Marcela
authors.initials: M
authors.lastname: Fu
authors.affiliation: Biostatistics Unit, Department of Basic Sciences, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona, Spain.
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Martín-Sánchez
authors.affiliation: Health Plan Directorate, Ministry of Health, Generalitat de Catalunya, Barcelona, Spain Department of Public Health, Universitat de Barcelona, Barcelona, Spain.
authors.forename: Esteve
authors.initials: E
authors.lastname: Saltó
authors.affiliation: Public Health Advocacy Institute, Northeastern University School of Law, Boston, Massachusetts, USA.
authors.forename: Mark
authors.initials: M
authors.lastname: Gottlieb
authors.affiliation: Public Health Advocacy Institute, Northeastern University School of Law, Boston, Massachusetts, USA.
authors.forename: Richard
authors.initials: R
authors.lastname: Daynard
authors.affiliation: Department of Social and Behavioral Sciences, Center for Global Tobacco Control, Harvard School of Public Health, Boston, Massachusetts, USA.
authors.forename: Gregory N
authors.initials: GN
authors.lastname: Connolly
authors.affiliation: Tobacco Control Unit, Cancer Prevention and Control Program, Institut Català d'Oncologia, L'Hospitalet de Llobregat, Barcelona, Spain Cancer Prevention and Control Group, Institut d'Investigació Biomèdica de Bellvitge-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain Department of Clinical Sciences, Universitat de Barcelona, Barcelona, Spain.
authors.forename: Esteve
authors.initials: E
authors.lastname: Fernández
mesh_terms: D000328:Adult; D000368:Aged; D003258:Consumer Behavior; D003430:Cross-Sectional Studies; D066300:Electronic Nicotine Delivery Systems / Q000706:statistics & numerical data*; D004581:Electronics; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D009538:Nicotine / Q000008:administration & dosage*; D016017:Odds Ratio; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology*; D016540:Smoking Cessation; D013030:Spain / Q000453:epidemiology; D062789:Tobacco Products / Q000706:statistics & numerical data; D014029:Tobacco Use Disorder; D055815:Young Adult
chemical_list: D009538:Nicotine
keywords: EPIDEMIOLOGY; PUBLIC HEALTH; e-cigarettes; electronic cigarettes; electronic nicotine delivery system