title: Adaptation of the 10-Item Functional Outcomes of Sleep Questionnaire to Iranian Patients with Obstructive Sleep Apnea.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the psychometric properties of the Farsi version of 10-item Functional Outcomes of Sleep Questionnaire (FOSQ-10) in Iranian patients with obstructive sleep apnea (OSA).
  
  
  METHODS
  The FOSQ-10 was translated into Farsi using the standard forward-backward method. One hundred patients who fulfilled the inclusion criteria completed a series of questionnaires including IR-FOSQ-10, Medical Outcome Survey Short Form 12 (SF-12) and Epworth Sleepiness Scale (ESS). Internal consistency, test-retest reliability, concurrent validity, discriminant validity and responsiveness of IR-FOSQ-10 were investigated.
  
  
  RESULTS
  The Cronbach's alpha coefficient was 0.85 in IR-FOSQ-10 total score and ranged from 0.78 to 0.83 in each subscale. The test-retest reliability demonstrated by intraclass coefficient was 0.92. There were significant moderate-to-good negative correlations between IR-FOSQ-10 subscales and ESS except for sexual relationship subscale. FOSQ-10 subscales generally correlated higher with related subscales of SF-12. The IR-FOSQ-10 was able to distinguish patients with abnormal sleepiness score from those with normal sleepiness score. The results of sensitivity to change proved that the IR-FOSQ-10 was able to detect changes after continuous positive airway pressure therapy.
  
  
  CONCLUSIONS
  The psychometric properties of the IR-FOSQ-10 suggest that it is a reliable and valid measure among Iranian patients with OSA.
authors.affiliation: Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Sara
authors.initials: S
authors.lastname: Rahavi-Ezabadi
authors.affiliation: Occupational Sleep Research Center, Otorhinolaryngology Research Center, Otorhinolaryngology Head and Neck Surgery Department, Imam Khomeini Educational Complex Hospital, Valiasr Hospital, Tehran University of Medical Sciences, Tehran, Iran. a_amali@sina.tums.ac.ir.
authors.forename: Amin
authors.initials: A
authors.lastname: Amali
authors.affiliation: Occupational Sleep Research Center, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Khosro
authors.initials: K
authors.lastname: Sadeghniiat-Haghighi
authors.affiliation: Health Metrics Research Center, Iranian Institute for Health Sciences Research, ACECR, Tehran, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Montazeri
mesh_terms: D005260:Female; D006801:Humans; D007492:Iran; D008297:Male; D008875:Middle Aged; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results; D020181:Sleep Apnea, Obstructive / Q000453:epidemiology*; D011795:Surveys and Questionnaires; D016896:Treatment Outcome
keywords: Epworth Sleepiness Scale; Functional Outcomes of Sleep Questionnaire; Medical Outcome Survey Short Form 12; Obstructive sleep apnea; Reliability; Validity