title: Factors associated with the prevalence of anterior open bite among preschool children: a population-based study in Brazil.
abstract: BACKGROUND
  The aim of this study was to identify factors associated with the prevalence of anterior open bite among five-year-old Brazilian children.
  
  
  METHODS
  A cross-sectional study was undertaken using data from the National Survey of Oral Health (SB Brazil 2010). The outcome variable was anterior open bite classified as present or absent. The independent variables were classified by individual, sociodemographic and clinical factors. Data were analyzed through bivariate and multivariate analysis using SPSS statistical software (version 18.0) with a 95% level of significance.
  
  
  RESULTS
  The prevalence of anterior open bite was 12.1%. Multivariate analysis showed that preschool children living in Southern Brazil had an increased chance of 1.8 more times of having anterior open bite (CI 95%: 1.16-3.02). Children identified with alterations in overjet had 14.6 times greater chances of having anterior open bite (CI 95%: 8.98-24.03).
  
  
  CONCLUSIONS
  There was a significant association between anterior open bite and the region of Brazil where the children lived, the presence of altered overjet and the prevalence of posterior crossbite.
authors.affiliation: Federal University of Minas Gerais.
authors.forename: Daniella Borges
authors.initials: DB
authors.lastname: Machado
authors.affiliation: Federal University of Minas Gerais.
authors.forename: Valéria Silva Cândido
authors.initials: VS
authors.lastname: Brizon
authors.affiliation: School of Dentistry, State University of Campinas.
authors.forename: Gláucia Maria Bovi
authors.initials: GM
authors.lastname: Ambrosano
authors.affiliation: Biological Sciences Institute, UFMG.
authors.forename: Davidson Fróis
authors.initials: DF
authors.lastname: Madureira
authors.affiliation: School of Dentistry, UFMG.
authors.forename: Viviane Elisângela
authors.initials: VE
authors.lastname: Gomes
authors.affiliation: School of Dentistry, UFMG.
authors.forename: Ana Cristina Borges
authors.initials: AC
authors.lastname: de Oliveira
mesh_terms: D001938:Brazil / Q000453:epidemiology; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D003481:Cuspid / Q000473:pathology; D004245:DMF Index; D005260:Female; D006801:Humans; D007182:Income / Q000706:statistics & numerical data; D008297:Male; D008310:Malocclusion / Q000453:epidemiology; D020380:Needs Assessment / Q000706:statistics & numerical data; D024343:Open Bite / Q000453:epidemiology*; D057887:Overbite / Q000453:epidemiology; D011159:Population Surveillance; D015995:Prevalence; D012111:Residence Characteristics / Q000706:statistics & numerical data