title: Iranian Voice Quality of Life Profile (IVQLP): Factor Analysis.
abstract: OBJECTIVE
  An important domain in health-related quality of life evaluations is quality of life perceptions due to having a voice disorder. The objective of this study was to examine the factor structure of the Iranian Voice Quality of Life Profile (IVQLP) based on Exploratory Factor Analysis and confirmatory factor analysis.
  
  
  METHODS
  The study sample consisted of 280 patients (174 males and 106 females) diagnosed with MTD, benign organic disorders such as polyps and nodules, and unilateral vocal fold paralysis and cancer. To evaluate the different dimensions of the IVQLP, a principal component analysis (PCA) was conducted. Confirmatory factor analysis (CFA) was used to investigate the fitting of extracted dimensions and construct validity of the IVQLP.
  
  
  RESULTS
  The results showed that the IVQLP has a 4-factor structure. The first factor has 17 items and refers to Emotions. The second factor has 12 items and refers to Individual/Social Relations. The third factor with 6 items refers to Occupation, and the forth with 5 items relates to Psychosomatic characteristics.
  
  
  CONCLUSIONS
  The conclusion of this study is that the concept of quality of life in Iranian patients with voice disorders is somewhat different from that of Western patients. This difference can be seen in. the large number of items related to an Emotional factor and the identification of a Psychosomatic factor.
authors.affiliation: Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran. Electronic address: dehqan@usa.com.
authors.forename: Ali
authors.initials: A
authors.lastname: Dehqan
authors.affiliation: Department of Speech Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
authors.forename: Fariba
authors.initials: F
authors.lastname: Yadegari
authors.affiliation: Department of Communication Sciences and Disorders, Bowling Green State University, Bowling Green, Ohio.
authors.forename: Ronald C
authors.initials: RC
authors.lastname: Scherer
authors.affiliation: Department of Consultation, Kharazmi University, Tehran, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Asgari
authors.affiliation: Otolaryngology Research Center, Amiralam Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Payman
authors.initials: P
authors.lastname: Dabirmoghadam
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004644:Emotions; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007492:Iran; D008297:Male; D008875:Middle Aged; D009790:Occupations; D011237:Predictive Value of Tests; D025341:Principal Component Analysis; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D012919:Social Behavior; D011795:Surveys and Questionnaires; D014832:Voice Disorders / Q000175:diagnosis* / Q000503:physiopathology / Q000523:psychology; D014833:Voice Quality; D055815:Young Adult
keywords: Health related quality of life; IVQLP; Iranian population; Quality of life; Voice disorders