title: Psychometric properties of the Brazilian version of the Orthognathic Quality of Life Questionnaire.
abstract: OBJECTIVE
  To assess the construct validity and reliability of the Brazilian version of the Orthognathic Quality of Life Questionnaire (B-OQLQ).
  
  
  METHODS
  A cross-sectional study was performed, and 101 patients in need of orthodontic-surgical treatment were recruited at a public hospital (Hospital Universitário Pedro Ernesto) and a public dental school (Faculdade de Odontologia da Universidade do Estado do Rio de Janeiro). The B-OQLQ was self-completed. The mean age of the participants was 26.51 ± 9.25 years, and most were female (58.42%; n = 59). The construct validity was assessed using Spearman's correlation coefficient between the B-OQLQ and the Oral Health Impact Profile (OHIP-14) scores and between the B-OQLQ and subjective health indicators' scores. The reliability was assessed in terms of internal consistency and stability (test-retest) using Cronbach's alpha and the intraclass correlation coefficient (ICC), respectively.
  
  
  RESULTS
  Significant correlations were found between the B-OQLQ scores and the following: OHIP-14 total score (rs = 0.70, P < .001), perception of oral health (rs = -0.24, P = .02), single-item evaluation of quality of life (rs = -0.29, P = .03), satisfaction with physical appearance (rs = -0.40, P < .001), and satisfaction with facial appearance (rs = -0.39, P = .0001). Cronbach's alpha and the ICC was 0.95 and 0.90, respectively. The domains of B-OQLQ causing the most effect on the quality of life included "social aspects of deformity" (13.0 ± 10.54) and "facial aesthetics" (11.81 ± 6.23).
  
  
  CONCLUSIONS
  The Brazilian version of the OQLQ was shown to be valid and reliable with good psychometric properties and might thus be considered an appropriate tool to assess the effect of dentofacial deformities on the quality of life of individuals with this condition.
authors.affiliation: Master in Orthodontics, Department of Orthodontics, Rio de Janeiro State University, Rio de Janeiro, Brazil. Electronic address: evelinegava@gmail.com.
authors.forename: Eveline Coutinho Baldoto
authors.initials: EC
authors.lastname: Gava
authors.forename: José Augusto Mendes
authors.initials: JA
authors.lastname: Miguel
authors.forename: Adriana Monteiro
authors.initials: AM
authors.lastname: de Araújo
authors.forename: Branca Heloisa
authors.initials: BH
authors.lastname: de Oliveira
mesh_terms: D000293:Adolescent; D000328:Adult; D001294:Attitude to Health; D001938:Brazil; D003430:Cross-Sectional Studies; D004954:Esthetics; D005145:Face / Q000033:anatomy & histology; D005260:Female; D006304:Health Status; D006801:Humans; D007398:Interpersonal Relations; D007802:Language; D008297:Male; D008310:Malocclusion / Q000523:psychology*; D008875:Middle Aged; D009909:Oral Health; D010549:Personal Satisfaction; D011594:Psychometrics / Q000379:methods; D011788:Quality of Life; D015203:Reproducibility of Results; D012649:Self Concept; D057566:Self Report; D012923:Social Class; D011795:Surveys and Questionnaires; D055815:Young Adult