title: Cross-cultural adaptation and validation of the Chinese Voice Handicap Index-10.
abstract: OBJECTIVE
  Recent developments in voice assessment propose the use of quality of life measurements. The Voice Handicap Index (VHI) is one of the most psychometrically robust and well-studied instruments among the various instruments for measuring quality of life. Two versions of VHI (VHI-30 and VHI-10) have been shown to be valid instruments for distinguishing dysphonic from nondysphonic individuals and also for documenting treatment effect for dysphonic patients. The VHI has been used worldwide; however, the psychometric properties of the Chinese version of VHI remains untested. This study aimed to investigate such properties of the Chinese VHI-30 and VHI-10 in the Hong Kong Chinese population.
  
  
  METHODS
  Psychometric analysis of the Chinese VHI-30 and VHI-10 in dysphonic patients and control subjects.
  
  
  METHODS
  The original VHI-30 was translated into Chinese and was completed by 131 dysphonic patients and 54 nondysphonic individuals. The dysphonic patients also self-rated their dysphonic severity.
  
  
  RESULTS
  Results showed high test-retest reliability and high item-total correlation for both Chinese VHI-30 and VHI-10. Both Chinese versions could be used to distinguish different dysphonic groups and between dysphonic and nondysphonic groups. Significant correlation was found between the VHI scores and the patients' self-rated dysphonic severity.
  
  
  CONCLUSIONS
  The present study supported the original three-factorial structures of the VHI-30 and the use of the VHI for the Chinese population. It is shown that the Chinese VHI-10 is a strong representation of VHI-30 and is recommended for use in clinics because of its validity and ease of use by patients.
authors.affiliation: Division of Otorhinolaryngology Head & Neck Surgery, Department of Surgery, University of Hong Kong Medical Centre, Queen Mary Hospital, Hong Kong.
authors.forename: Paul K Y
authors.initials: PK
authors.lastname: Lam
authors.forename: Karen M
authors.initials: KM
authors.lastname: Chan
authors.forename: W K
authors.initials: WK
authors.lastname: Ho
authors.forename: Elaine
authors.initials: E
authors.lastname: Kwong
authors.forename: Edwin M
authors.initials: EM
authors.lastname: Yiu
authors.forename: William I
authors.initials: WI
authors.lastname: Wei
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People; D004185:Disability Evaluation; D006233:Persons with Disabilities / Q000145:classification*; D005260:Female; D006723:Hong Kong / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011594:Psychometrics / Q000379:methods; D011788:Quality of Life; D015203:Reproducibility of Results; D014832:Voice Disorders / Q000208:ethnology* / Q000534:rehabilitation