title: [Validation of Brazilian Portuguese version of quality of life questionnaire for women with endometriosis (Endometriosis Health Profile Questionnaire--EHP-30)].
abstract: OBJECTIVE
  the objective of the present study was the development of the Brazilian Portuguese version of Endometriosis Health Profile Questionnaire (EHP-30), the cross-cultural adaptation to Brazil and the evaluation of EHP-30 Portuguese psychometric measures in a Brazilian sample.
  
  
  METHODS
  the original instrument in English was translated into Portuguese following international guidelines, going through all stages of translation, back-translation and comparison of the versions for cross-cultural adaptation, face and content validity. A sample of 54 patients with endometriosis was used for internal consistency analyses using the Cronbach alpha. Test-retest reliability was evaluated through the intraclass correlation coefficient (ICC). In order to evaluate the convergent construct validity, the correlation between EHP-30 Portuguese and WHOQOL-Bref and Beck Depression Inventory (BDI) was tested.
  
  
  RESULTS
  internal consistency presented alpha values of 0.8 to 0.9 suggesting homogeneity between questions. The test-retest reliability presented ICC of 0.8 to 0.9 showing instrument stability. In the construct validation, strong correlations were demonstrated of the EHP-30 Portuguese self-image scale with physical (-0.6) and psychological domains (-0.6) of WHOQOL-Bref, and EHP-30 Portuguese social support scale with BDI (0.5), confirming good correlation with other quality of life evaluation instruments.
  
  
  CONCLUSIONS
  the EHP-30 Portuguese was found to be an easy, quickly applied instrument, and well-accepted by the patients. It presented good psychometric properties with appropriate reliability measures (internal consistency and test-retest reliability) and construct validity. These results show that EHP-30 Portuguese is an adequate instrument for quality of life evaluation in Brazilian women with endometriosis, both in clinical and research setting.
authors.affiliation: Consultora da Secretaria Estadual da Saúde do Rio Grande do Sul, Porto Alegre, RS, Brazil. claudiamengarda@yahoo.com
authors.forename: Cláudia Vieira
authors.initials: CV
authors.lastname: Mengarda
authors.forename: Eduardo Pandolfi
authors.initials: EP
authors.lastname: Passos
authors.forename: Patrícia
authors.initials: P
authors.lastname: Picon
authors.forename: Andry Fiterman
authors.initials: AF
authors.lastname: Costa
authors.forename: Paulo Dornelles
authors.initials: PD
authors.lastname: Picon
mesh_terms: D000328:Adult; D001938:Brazil; D004715:Endometriosis; D005260:Female; D005831:Genital Diseases, Female; D006801:Humans; D007802:Language; D011788:Quality of Life; D011795:Surveys and Questionnaires; D055815:Young Adult