title: Validation of the Portuguese Version of EHP-30 (The Endometriosis Health Profile-30).
abstract: BACKGROUND
  Endometriosis Health Profile Questionnaire-30 is currently the most used questionnaire for quality of life measurement in women with endometriosis. The aim of this study is to evaluate the psychometric properties and to validate the Portuguese Endometriosis Health Profile Questionnaire-30 version.
  
  
  METHODS
  A sequential sample of 152 patients with endometriosis, followed in a Portugal reference center, were asked to complete a questionnaire on social and demographic features, the Portuguese version of the Endometriosis Health Profile Questionnaire-30 and of the Short Form Health Survey 36 Item â version 2. Appropriate statistical analysis was performed using descriptive statistics, factor analysis, internal consistency, item-total correlation and convergent validity.
  
  
  RESULTS
  Factorial analysis confirmed the validity of the five-dimension structure of the Endometriosis Health Profile Questionnaire-30 core questionnaire, which explained 83.2% of the total variance. All item-total correlations presented acceptable results and high internal consistency, with Cronbach's alpha ranging between 0.876 and 0.981 for the core questionnaire and between 0.863 and 0.951 for the modular questionnaire. Significant negative associations between similar scales of Endometriosis Health Profile Questionnaire-30 and Short Form Health Survey 36 Item â version 2 were demonstrated. Data completeness achieved was high for all dimensions. The emotional well-being scale in the core questionnaire and the infertility scale in the modular section had the highest median scores, and therefore the most negative impact on the quality of life of participating women.
  
  
  CONCLUSIONS
  The test-retest reliability and responsiveness of the questionnaire should be evaluated in future studies.
  
  
  CONCLUSIONS
  The present study demonstrates that the Portuguese version of the Endometriosis Health Profile Questionnaire-30 is a valid, reliable and acceptable tool for evaluating the health-related quality of life of Portuguese women with endometriosis.
authors.affiliation: Instituto de Investigação em Ciências da Vida e da Saúde. Escola de Ciências da Saúde. Universidade do Minho. Braga. Portugal. Instituto de Investigação em Ciências da Vida e da Saúde/3Bâs â Laboratório Associado do Governo Português. Braga/ Guimarães. Portugal. Serviço de Ginecologia e Obstetrícia. Hospital de Braga. Braga. Portugal.
authors.forename: Cristina
authors.initials: C
authors.lastname: Nogueira-Silva
authors.affiliation: Instituto de Investigação em Ciências da Vida e da Saúde. Escola de Ciências da Saúde. Universidade do Minho. Braga. Portugal. Instituto de Investigação em Ciências da Vida e da Saúde/3Bâs â Laboratório Associado do Governo Português. Braga/ Guimarães. Portugal.
authors.forename: Patrício
authors.initials: P
authors.lastname: Costa
authors.affiliation: AlcaisFisio. Lisboa. Portugal.
authors.forename: Carla
authors.initials: C
authors.lastname: Martins
authors.affiliation: Clínica Universitária de Obstetrícia e Ginecologia. Centro Hospitalar Lisboa Norte - Hospital Universitário de Santa Maria. Lisboa. Portugal.
authors.forename: Sónia
authors.initials: S
authors.lastname: Barata
authors.affiliation: Clínica Universitária de Obstetrícia e Ginecologia. Centro Hospitalar Lisboa Norte - Hospital Universitário de Santa Maria. Lisboa. Portugal.
authors.forename: Conceição
authors.initials: C
authors.lastname: Alho
authors.affiliation: Clínica Universitária de Obstetrícia e Ginecologia. Centro Hospitalar Lisboa Norte - Hospital Universitário de Santa Maria. Lisboa. Portugal. Departamento de Obstetrícia e Ginecologia. Faculdade de Medicina. Universidade de Lisboa. Lisboa. Portugal.
authors.forename: Carlos
authors.initials: C
authors.lastname: Calhaz-Jorge
authors.affiliation: Clínica Universitária de Obstetrícia e Ginecologia. Centro Hospitalar Lisboa Norte - Hospital Universitário de Santa Maria. Lisboa. Portugal. Departamento de Obstetrícia e Ginecologia. Faculdade de Medicina. Universidade de Lisboa. Lisboa. Portugal.
authors.forename: Filipa
authors.initials: F
authors.lastname: Osório
mesh_terms: D000328:Adult; D004715:Endometriosis / Q000175:diagnosis; D005260:Female; D006801:Humans; D008875:Middle Aged; D011174:Portugal; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D057566:Self Report; D014177:Translations; D055815:Young Adult