title: Anxiety and depression in adolescents with hostile behaviour.
abstract: BACKGROUND
  Adolescents go through a phase characterised by physical, mental, psychological and social changes which justify periods of hostile behaviours. The occurrence and intensity of these behaviours may correspond to a psychopathological condition that will affect their future lives. The aim of this research is to identify the socio-demographic and family background variables that influence hostile behaviours in adolescents and to analyse the influence of depression and anxiety in hostile behaviours in adolescents.
  
  
  METHODS
  This is a quantitative, non-experimental, cross-sectional, descriptive, correlational study with epidemiological characteristics. The sample consists of 1890 adolescents, 863 (45.7%) boys and 1027 (54.3%) girls whose average age is 16.26 years. The data collection instrument includes the socio-demographic and family background and anxiety, depression and hostile behaviours in adolescence measurement scales: the State-Trait Anxiety Scale, the Depression Scale and the Buss-Durkee Hostility Inventory.
  
  
  RESULTS
  We found that the prevalent group is between 17 and 21 years old (40.3%) 41.4% boys and 39.4% girls; the highest percentage of the adolescents (37.8%) are in the 10th year of schooling; 50.7% live in the city, 70.0% live with their parents; the monthly household income is medium-high (56.7%) for (56.5%) girls; 3.5% of the adolescents exhibit depressive symptoms, mostly girls who are 17 or older; girls have higher levels of anxiety-trait and boys of anxiety-state.
  
  
  CONCLUSIONS
  We may conclude that only depression has a relationship with hostile behaviours. It is higher in adolescents with these behaviours. The presence or absence of anxiety is not related to the hostile behaviour in adolescents.
authors.affiliation: Escola Superior de Saúde de Viseu, CI&DETS, Instituto Politécnico de Viseu, Viseu, Portugal. Electronic address: cruzcarla@hotmail.com.
authors.forename: Carla
authors.initials: C
authors.lastname: Cruz
authors.affiliation: Escola Superior de Saúde de Viseu, CI&DETS, Instituto Politécnico de Viseu, Viseu, Portugal.
authors.forename: João
authors.initials: J
authors.lastname: Duarte
authors.affiliation: Escola Superior de Saúde de Viseu, CI&DETS, Instituto Politécnico de Viseu, Viseu, Portugal.
authors.forename: Paula
authors.initials: P
authors.lastname: Nelas
authors.affiliation: Centro Hospitalar Tondela Viseu, Viseu, Portugal.
authors.forename: Anabela
authors.initials: A
authors.lastname: Antunes
authors.affiliation: Hospital São Francisco Xavier, Lisboa, Portugal.
authors.forename: Mariline
authors.initials: M
authors.lastname: Almeida
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D001007:Anxiety / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D003863:Depression / Q000453:epidemiology*; D005260:Female; D006791:Hostility; D006801:Humans; D008297:Male; D055815:Young Adult
keywords: Adolescents; Anxiety; Depression; Hostile behaviours