title: Adaptation and Validation of the Voice-Related Quality of Life Measure Into Polish.
abstract: OBJECTIVE
  The purpose of the study was to translate and adapt the original V-RQOL (Voice-Related Quality of Life) instrument into Polish and to evaluate the psychometric properties of the Polish version of the V-RQOL Measure such as internal consistency, reliability, and construct validity in different groups of dysphonic patients.
  
  
  METHODS
  A total of 214 patients with voice disorders were assessed using the V-RQOL Measure, the Voice Handicap Index, and the World Health Organization Quality of Life, short version.
  
  
  RESULTS
  The Polish version of the V-RQOL Measure showed strong internal consistency with the Cronbach alpha coefficient: 0.92 for the total score, 0.90 for the social-emotional domain, and 0.86 for the physical functioning domain, and a good test-retest reliability (r-Spearman correlation coefficient: r = 0.8852 for the total score of the V-RQOL Measure). Construct validity was demonstrated with a strong correlation to the Voice Handicap Index (r = -0.843, P = 0.000*) and a weak positive, statistically significant correlation between the V-RQOL-physical functioning domain, V-RQOL-social-emotional domain, and the Q1, Q2, and Domain 1-Domain 4 of the World Health Organization Quality of Life, short version (0.2 < r < 0.4).
  
  
  CONCLUSIONS
  The Polish version of the V-RQOL Measure is a valid and reliable instrument to evaluate the patient's perception of his or her own voice disorders and the impact it can have on the patient's life. The V-RQOL Measure is easy to perform in clinical practice.
authors.affiliation: Department of Otolaryngology, Medical University of Warsaw, Warsaw, Poland.
authors.forename: Ewelina
authors.initials: E
authors.lastname: Sielska-Badurek
authors.affiliation: Department of Otolaryngology, Medical University of Warsaw, Warsaw, Poland. Electronic address: arzepakowska@wum.edu.pl.
authors.forename: Anna
authors.initials: A
authors.lastname: Rzepakowska
authors.affiliation: Department of Biophysics and Human Physiology, Medical University of Warsaw, Warsaw, Poland.
authors.forename: Maria
authors.initials: M
authors.lastname: Sobol
authors.affiliation: Department of Otolaryngology, Medical University of Warsaw, Warsaw, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Osuch-Wójcikiewicz
authors.affiliation: Department of Otolaryngology, Medical University of Warsaw, Warsaw, Poland.
authors.forename: Kazimierz
authors.initials: K
authors.lastname: Niemczyk
mesh_terms: D000328:Adult; D000368:Aged; D017281:Cost of Illness; D004185:Disability Evaluation; D055154:Dysphonia / Q000175:diagnosis* / Q000503:physiopathology / Q000523:psychology; D004644:Emotions; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D008875:Middle Aged; D011044:Poland; D011237:Predictive Value of Tests; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D012919:Social Behavior; D011795:Surveys and Questionnaires; D014175:Translating; D014833:Voice Quality
keywords: Quality of life; Validation; Voice Handicap Index (VHI); Voice disorders; Voice-Related Quality of Life (V-RQOL) Measure