title: Translation and validation of Portuguese of a questionnaire for evaluation of psychosomatic symptoms in adults with atopic dermatitis.
abstract: BACKGROUND
  atopic dermatitis is directly related to psychological stress, reduced quality of life and psychosomatic symptoms. The Psychosomatic Scale for Atopic Dermatitis is the only questionnaire developed specifically for assessment of psychosomatization in atopic dermatitis.
  
  
  OBJECTIVE
  the objective of this study was to cross-culturally adapt and validate a Brazilian-Portuguese version of the Psychosomatic Scale for Atopic Dermatitis.
  
  
  METHODS
  adaptation consisted of independent translation and backtranslation by three bilingual translators, followed by a pre-test. The Psychosomatic Scale for Atopic Dermatitis and the Dermatology Life Quality Index were self-administered to 47 patients with atopic dermatitis. Disease severity was evaluated using the Eczema Area and Severity Index. Factor analysis was used to identify the dimensions of the Brazilian Portuguese version of the Psychosomatic Scale for Atopic Dermatitis. Internal consistency and convergence validity were also analyzed. Reproducibility was assessed using the Kappa coefficient.
  
  
  RESULTS
  factor analysis revealed a two-dimensional structure: stress/laziness/insecurity (I) and maladjustment/social relationships (II), explaining 54.4% of total variance. All dimensions revealed excellent internal consistency. External construct validity was confirmed by positive correlations between the Psychosomatic Scale for Atopic Dermatitis and the Dermatology Life Quality Index. Test-retest reliability was excellent, with k>0.7 for all questions.
  
  
  CONCLUSIONS
  the Brazilian Portuguese version of the Psychosomatic Scale for Atopic Dermatitis demonstrated acceptable psychometric properties and can be used for the evaluation of psychosomatic symptoms in patients with atopic dermatitis and as a tool in clinical and epidemiological research.
authors.affiliation: Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Manuela
authors.initials: M
authors.lastname: Boleira
authors.affiliation: Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Omar
authors.initials: O
authors.lastname: Lupi
authors.affiliation: Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Gisele Vianna
authors.initials: GV
authors.lastname: Pires
authors.affiliation: Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Dias
authors.affiliation: Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Amanda Jaccobson
authors.initials: AJ
authors.lastname: Seba
authors.affiliation: Universidade de Sherbrooke, Sherbrooke, Canadá
authors.forename: Daniel Boleira Sieiro
authors.initials: DB
authors.lastname: Guimarães
mesh_terms: D000328:Adult; D001938:Brazil; D003431:Cross-Cultural Comparison; D003876:Dermatitis, Atopic / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011594:Psychometrics / Q000379:methods; D011602:Psychophysiologic Disorders / Q000175:diagnosis*; D011788:Quality of Life / Q000523:psychology; D012016:Reference Values; D015203:Reproducibility of Results; D013315:Stress, Psychological / Q000175:diagnosis; D011795:Surveys and Questionnaires / Q000592:standards*; D014177:Translations; D055815:Young Adult