title: [Tobacco use by adolescents in Barcelona (Spain) and trends in the last 20 years].
abstract: OBJECTIVE
  Smoking is a preventable cause of early death and the habit starts in adolescence. The aim of this study was to describe tobacco consumption in secondary school students in 2008 and trends in the last 20 years in Barcelona.
  
  
  METHODS
  We analyzed the trend in tobacco consumption by comparing data from 8 surveys carried out between 1987 and 2008 in the 8th (2nd year of Compulsory Secondary Education), 10th (4th year of Compulsory Secondary Education) and 12th (2nd year of Compulsory Secondary Education) years of secondary school. The FRESC questionnaire was used. Data on regular and daily consumption and associated factors in 2008 were gathered and compared with those corresponding to the previous studies. Percentages of annual change were calculated with Joinpoint regression and data were stratified by sex and year of education.
  
  
  RESULTS
  In 2008, 6.1% of boys and 4.5% of girls in the 8th year, 15.8% and 20.4% of those in the 10th year, respectively, and 26.1% and 33.1% of those in the 12th year, respectively, were regular smokers. A strong association was noted between regular smoking and cannabis consumption in three school years, as well as with having friends who were smokers and poor school performance. At 15-16 years old, the average annual decrease from 1996 to 2008 was 6.8% in girls and 6.1% in boys.
  
  
  CONCLUSIONS
  Adolescent smoking has been decreasing in the last few years in Barcelona. There is a strong association between tobacco use and cannabis consumption.
authors: Agència de Salut Pública de Barcelona, Barcelona, España; CIBER de Epidemiología y Salud Pública (CIBERESP), España; Instituto de Investigación Biomédica Sant Pau (IIB Sant Pau), Barcelona, España. Electronic address: cariza@aspb.cat.
authors: Carles
authors: C
authors: Ariza
authors: Agència de Salut Pública de Barcelona, Barcelona, España; CIBER de Epidemiología y Salud Pública (CIBERESP), España.
authors: Xavier
authors: X
authors: García-Continente
authors: Agència de Salut Pública de Barcelona, Barcelona, España; CIBER de Epidemiología y Salud Pública (CIBERESP), España; Instituto de Investigación Biomédica Sant Pau (IIB Sant Pau), Barcelona, España.
authors: Joan Ramon
authors: JR
authors: Villalbí
authors: Agència de Salut Pública de Barcelona, Barcelona, España; CIBER de Epidemiología y Salud Pública (CIBERESP), España; Instituto de Investigación Biomédica Sant Pau (IIB Sant Pau), Barcelona, España.
authors: Francesca
authors: F
authors: Sánchez-Martínez
authors: Agència de Salut Pública de Barcelona, Barcelona, España; CIBER de Epidemiología y Salud Pública (CIBERESP), España; Instituto de Investigación Biomédica Sant Pau (IIB Sant Pau), Barcelona, España.
authors: Anna
authors: A
authors: Pérez
authors: Agència de Salut Pública de Barcelona, Barcelona, España; CIBER de Epidemiología y Salud Pública (CIBERESP), España; Instituto de Investigación Biomédica Sant Pau (IIB Sant Pau), Barcelona, España.
authors: Manel
authors: M
authors: Nebot
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D008297:Male; D012574:Schools; D013030:Spain / Q000453:epidemiology; D013997:Time Factors; D064424:Tobacco Use / Q000453:epidemiology*; D014504:Urban Health
keywords: Adolescence; Adolescencia; Associated factors; Escuela; Factores asociados; Pevalencia; Prevalence; Schools; Tabaco; Tendencias; Tobacco smoking; Trends