title: [Trends in smoking in an urban population over recent decades].
abstract: BACKGROUND
  The objective of this study is to describe the distribution of smoking in the population and to assess changes and trends over recent decades.
  
  
  METHODS
  Cross sectional study in a sample of the non-institutionalized resident population (n=3,509) in Barcelona (Catalonia, Spain) using data from persons over 14 years of age from the health survey of 2011, and assessing trends for 1983-2011 using previous surveys. Dependent variables are having ever been a smoker, having quit, being a current smoker, and smoking daily. Independent variables include sex, age, and time. Prevalence and proportions are estimated, stratifying or adjusting for age.
  
  
  RESULTS
  The prevalence of daily smokers is 18.8% in 2011: 22.2% for men and 15.9% for women. The age groups with higher smoking prevalence are 25-34 years for men and 15-24 for women. From 1983 to 2011 the reduction among men has been intense, and for women the prevalence has been decreasing since the survey of 2000. Among smokers, the proportion of both genders who do not smoke daily has increased.
  
  
  CONCLUSIONS
  The smoking epidemic over the last years shows promising trends. The data do not lend support to the hardening hypothesis for current smokers. Smokers are a shrinking minority, although to improve public health it would be desirable to speed the process of change.
authors.affiliation: Agència de Salut Pública de Barcelona, Barcelona, España; Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Barcelona, España; Institut d'Investigació Biomèdica Sant Pau, Barcelona, España; Universitat Pompeu Fabra, Barcelona, España. Electronic address: jrvillal@aspb.cat.
authors.forename: Joan R
authors.initials: JR
authors.lastname: Villalbí
authors.affiliation: Agència de Salut Pública de Barcelona, Barcelona, España; Institut d'Investigació Biomèdica Sant Pau, Barcelona, España.
authors.forename: Xavier
authors.initials: X
authors.lastname: Bartoll
authors.affiliation: Agència de Salut Pública de Barcelona, Barcelona, España; Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Barcelona, España; Institut d'Investigació Biomèdica Sant Pau, Barcelona, España; Universitat Pompeu Fabra, Barcelona, España.
authors.forename: Maica
authors.initials: M
authors.lastname: Rodríguez-Sanz
authors.affiliation: Agència de Salut Pública de Barcelona, Barcelona, España; Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Barcelona, España; Institut d'Investigació Biomèdica Sant Pau, Barcelona, España; Universitat Pompeu Fabra, Barcelona, España.
authors.forename: Carme
authors.initials: C
authors.lastname: Borrell
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology*; D013030:Spain / Q000453:epidemiology; D014504:Urban Health / Q000706:statistics & numerical data / Q000639:trends*; D055815:Young Adult
keywords: Encuesta; Epidemiology; Epidemiología; Factores de riesgo; Prevalence; Prevalencia; Risk factors; Smoking; Survey; Tabaco