title: Transcultural adaptation and psychometric validation of a Spanish-language version of the "Pelvic Girdle Questionnaire".
abstract: BACKGROUND
  The Pelvic Girdle Questionnaire is the only instrument designed to assess pain and disability specifically in pregnant or postpartum women with pelvic girdle pain. The objective of this study was the adaptation to the Spanish language and analysis of the psychometric properties of the Pelvic Girdle Questionnaire.
  
  
  METHODS
  This is a descriptive cross-sectional study divided into two phases. In the first phase, a translation and adaptation process was performed according to international guidelines. Secondly, the analysis of the properties of the Spanish version was conducted using a sample of 125 pregnant or postpartum women suffering from pelvic girdle pain. Participants completed the Spanish version along with five other measurement instruments through an online platform. Internal consistency, construct validity, test-retest reliability, the ceiling and floor effects, responsiveness and discriminatory ability of the Spanish version were analysed.
  
  
  RESULTS
  The Spanish version of the Pelvic Girdle Questionnaire showed high internal consistency with Cronbach's alpha = 0.961, and an intraclass correlation coefficient of 0.962. The convergent validity showed high positive correlation with other questionnaires used. ROC curves showed no discriminatory capacity for number of sites of pain or pregnancy/post-partum state.
  
  
  CONCLUSIONS
  This article presents the translation, validation and psychometric properties of the Spanish version of the Pelvic Girdle Questionnaire, that has proved to be an appropriate and valid assessment tool of disability due to pelvic girdle pain in pregnant and postpartum women.
authors.affiliation: Physiotherapy and Nursery Department, Alcalá University, Madrid, Spain.
authors.forename: Montserrat
authors.initials: M
authors.lastname: Rejano-Campo
authors.affiliation: Department of Physiotherapy, Faculty of Health Science, The Center for Advanced Studies University La Salle, Universidad Autónoma de Madrid, Madrid, Spain.
authors.forename: Raúl
authors.initials: R
authors.lastname: Ferrer-Peña
authors.affiliation: Department of Rehabilitation and Physiotherapy, University Hospital Alcorcon Foundation, Madrid, Spain.
authors.forename: M Alicia
authors.initials: MA
authors.lastname: Urraca-Gesto
authors.affiliation: Physiotherapy and Nursery Department, Alcalá University, Madrid, Spain.
authors.forename: Tomás
authors.initials: T
authors.lastname: Gallego-Izquierdo
authors.affiliation: Physiotherapy and Nursery Department, Alcalá University, Madrid, Spain.
authors.forename: Daniel
authors.initials: D
authors.lastname: Pecos-Martín
authors.affiliation: Department of Orthopaedics, Oslo University Hospital, Oslo, Norway.
authors.forename: Britt
authors.initials: B
authors.lastname: Stuge
authors.affiliation: Departamento de Medicina Física y Rehabilitación, Facultad de Medicina, Universidad Complutense de Madrid, Ciudad Universitaria, Madrid, 28040, Spain. gusplaza@ucm.es.|Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain. gusplaza@ucm.es.
authors.forename: Gustavo
authors.identifier: http://orcid.org/0000-0003-1596-5027
authors.initials: G
authors.lastname: Plaza-Manzano
mesh_terms: D000293:Adolescent; D000328:Adult; D003431:Cross-Cultural Comparison; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008875:Middle Aged; D059388:Pelvic Girdle Pain / Q000175:diagnosis* / Q000208:ethnology* / Q000523:psychology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis* / Q000208:ethnology* / Q000523:psychology; D011644:Puerperal Disorders / Q000175:diagnosis* / Q000208:ethnology* / Q000523:psychology; D013030:Spain; D011795:Surveys and Questionnaires; D014175:Translating; D055815:Young Adult
keywords: Cultural adaptation; Pelvic Girdle Questionnaire; Pelvic girdle pain; Postpartum; Validation studies