title: Comparison of two assessment instruments of quality of life in older adults.
abstract: OBJECTIVE
  To investigate if there is convergent validity between the dimensions of the World Health Organization Quality of Life Questionnaire-Brief Version (WHOQOL-Bref) and the Oral Health Impact Profile-14 (OHIP-14) questionnaire.
  
  
  METHODS
  In this cross-sectional study, a random sample of 872 elderly Southern-Brazilians was evaluated. Questionnaires assessing socio-demographic data and quality of life in general (WHOQOL-Bref) and oral health-related quality of life (OHIP-14) were used. Analysis of the WHOQOL-Bref and OHIP-14 questionnaires used descriptive statistics. The dimensions of the WHOQOL-Bref and OHIP-14 questionnaires were correlated by affinity. The convergence between WHOQOL-Bref and OHIP-14 dimensions was analyzed by Spearman's correlation coefficients.
  
  
  RESULTS
  The social relations dimension of the WHOQOL-Bref presented the greatest mean (18.24 ± 2.30). The physical pain dimension of the OHIP-14 presented a median of 1.0 (0.0 - 3.0). All correlations between the WHOQOL-Bref and OHIP-14 dimensions were significant, negative and associated with a low magnitude. The correlation between WHOQOL-physical and OHIP-functional limitation, OHIP-physical pain, OHIP-physical disability and OHIP-handicap were - 0.164, - 0.262, - 0.196 and - 0.125 respectively. WHOQOL-psychological was associated with OHIP-psychological discomfort and OHIP-psychological disability, and WHOQOL-social showed an association with OHIP-social disability.
  
  
  CONCLUSIONS
  All correlations analyzed had a positive association of low magnitude. Despite the fact that the WHOQOL-Bref and OHIP-14 instruments have related dimensions, they measure physical, psychological and social relations differently.
authors.affiliation: Federal University of Rio Grande do Sul, Faculty of Dentistry, Department of Preventive and Social Dentistry, Porto Alegre,, Brazil.
authors.forename: Camila
authors.initials: C
authors.lastname: Mello dos Santos
authors.forename: Fernando Neves
authors.initials: FN
authors.lastname: Hugo
authors.forename: Andréa Fachel
authors.initials: AF
authors.lastname: Leal
authors.forename: Juliana Balbinot
authors.initials: JB
authors.lastname: Hilgert
mesh_terms: D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D009909:Oral Health; D011788:Quality of Life; D011795:Surveys and Questionnaires; D014944:World Health Organization