title: [Epidemiological study of risk behaviour in adolescents at school in two populations, semi-rural and urban].
abstract: OBJECTIVE
  Describe the risk behavior relationships existing in school adolescents between themselves and with the place of residence.
  
  
  METHODS
  Cross-sectional descriptive study.
  
  
  METHODS
  School students from Cabra (semi-rural, 1319 students) and from one high school in Las Palmas de Gran Canaria (urban: 1,751 students).
  
  
  METHODS
  n=738 (368/370). Sampling unit classroom. MEASUREMENTS AND MAIN RESULTS. Anonymous, self-filled questionnaire, with several subjects: demographic data, traffic-related risk conducts, alcohol consumption, tobacco, other drugs, sexuality, physical exercise and dietetic habits.
  
  
  METHODS
  attendance at class on the day of the questionnaire and age 15-21. The relationship between variables was studied by logistical regression and multiple correspondence analysis (MCA); odds ratio (OR: logistical regression) with 95% confidence intervals (CI) were calculated. Median age: Cabra 17.6 (CI, 17.5-17.8), Las Palmas 16.4 (CI, 16.2-16.5). Those living in Las Palmas have a higher risk of heavy drinking on weekends (OR, 3.2; CI, 1.9-5.1), of being offered drugs (OR, 4.5; CI, 3.1-6.5) and of consuming them (OR, 4.1; CI, 2.1-8.3), as well as of having sexual intercourse (OR, 2.5; CI, 1.6-3.8). In the MCA tobacco, alcohol and other drug use, having sexual intercourse and not doing regular physical exercise were closely-located within themselves.
  
  
  CONCLUSIONS
  Risk behaviours are interrelated and influenced by the habitat, and start to appear at the beginning of the adolescence.
authors.affiliation: Especialista en Medicina Familiar y Comunitaria. Especialista en Medicina Preventiva y Salud Pública. Máster en Salud Pública. Consultorio Doña Mencía, ZBS. Cabra (Córdoba). España. jegonla@wandoo.es
authors.forename: J
authors.initials: J
authors.lastname: González Lama
authors.forename: J R
authors.initials: JR
authors.lastname: Calvo Fernández
authors.forename: P
authors.initials: P
authors.lastname: Prats León
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology*; D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D016017:Odds Ratio; D015995:Prevalence; D012307:Risk Factors; D012309:Risk-Taking; D012424:Rural Population / Q000706:statistics & numerical data*; D012574:Schools; D012959:Socioeconomic Factors; D013030:Spain / Q000453:epidemiology; D011795:Surveys and Questionnaires; D014505:Urban Population / Q000706:statistics & numerical data*