title: [Cross-cultural adaptation and validation of the PROMIS Global Health scale in the Portuguese language].
abstract: This study aimed to perform the cross-cultural adaptation and validation of the Patient-Reported Outcomes Measurement Information System (PROMIS) Global Health scale in the Portuguese language. The ten Global Health items were cross-culturally adapted by the method proposed in the Functional Assessment of Chronic Illness Therapy (FACIT). The instrument's final version in Portuguese was self-administered by 1,010 participants in Brazil. The scale's precision was verified by floor and ceiling effects analysis, reliability of internal consistency, and test-retest reliability. Exploratory and confirmatory factor analyses were used to assess the construct's validity and instrument's dimensionality. Calibration of the items used the Gradual Response Model proposed by Samejima. Four global items required adjustments after the pretest. Analysis of the psychometric properties showed that the Global Health scale has good reliability, with Cronbach's alpha of 0.83 and intra-class correlation of 0.89. Exploratory and confirmatory factor analyses showed good fit in the previously established two-dimensional model. The Global Physical Health and Global Mental Health scale showed good latent trait coverage according to the Gradual Response Model. The PROMIS Global Health items showed equivalence in Portuguese compared to the original version and satisfactory psychometric properties for application in clinical practice and research in the Brazilian population.
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, Brasil.
authors.forename: Camila Eugênia
authors.initials: CE
authors.lastname: Zumpano
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, Brasil.
authors.forename: Tânia Maria da Silva
authors.initials: TM
authors.lastname: Mendonça
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, Brasil.
authors.forename: Carlos Henrique Martins da
authors.initials: CH
authors.lastname: Silva
authors.affiliation: Northwestern University, Evanston, U.S.A.
authors.forename: Helena
authors.initials: H
authors.lastname: Correia
authors.affiliation: FACITtrans, Elmhurst, U.S.A.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Arnold
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, Brasil.
authors.forename: Rogério de Melo Costa
authors.initials: RM
authors.lastname: Pinto
mesh_terms: D000293:Adolescent; D000328:Adult; D001938:Brazil; D002908:Chronic Disease; D003431:Cross-Cultural Comparison; D003430:Cross-Sectional Studies; D003466:Cultural Characteristics; D005260:Female; D014943:Global Health; D006801:Humans; D008297:Male; D008875:Middle Aged; D011594:Psychometrics; D015203:Reproducibility of Results; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D014177:Translations; D055815:Young Adult