title: Validation of the Voice Handicap Index: 10 (VHI-10) to the Brazilian Portuguese.
abstract: OBJECTIVE
  To validate the Voice Handicap Index-10 (VHI-10) into Brazilian Portuguese and to check its psychometric measures.
  
  
  METHODS
  The validation was performed following the guidelines suggested by the Scientific Advisory Committee of the Medical Outcomes Trust. A hundred ten individuals participated, 60 with vocal complaint, 6 males and 54 females, with age ranging from 21 to 82 years; and 50 without vocal complaint, 6 males and 44 females, age ranging from 18 to 87 years. The procedures performed were a voice self-assessment and the VHI-10. For the self-assessment, the individuals evaluated their vocal quality by means of a five-point scale: excellent, very good, good, fair and poor. The VHI-10 was administered twice to 30 of the 60 individuals with vocal complaint to determine the test-retest reproducibility. For checking the sensitivity, the VHI-10 was administered to 21 patients that underwent voice rehabilitation.
  
  
  RESULTS
  The validity was determined by comparing the total score with the self-assessment results. Individuals that classified their voice as poor had a total score of 28.2 (standard deviation=8). Internal consistence was determined with high values of coefficient (p<0.001). Results showed a high level of reproducibility (p=0.0114). Sensitivity was demonstrated with a significant difference between pre and post-rehabilitation results (p<0.005).
  
  
  CONCLUSIONS
  The VHI-10 is an instrument validated into Brazilian Portuguese, with psychometric measures of validity, reliability and sensibility proven and can be applied to individuals with voice problems.
authors.forename: Thiago
authors.initials: T
authors.lastname: Costa
authors.forename: Gisele
authors.initials: G
authors.lastname: Oliveira
authors.forename: Mara
authors.initials: M
authors.lastname: Behlau
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001938:Brazil; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011594:Psychometrics; D015203:Reproducibility of Results; D012647:Self-Assessment; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D014832:Voice Disorders / Q000175:diagnosis*; D014833:Voice Quality; D055815:Young Adult