Sleep and Breathing

, Volume 20, Issue 2, pp 523–528 | Cite as

Translation, cultural adaptation, and validation of the Sleep Apnea Quality of Life Index (SAQLI) in Persian-speaking patients with obstructive sleep apnea

  • Sara Rahavi-Ezabadi
  • Amin AmaliEmail author
  • Khosro Sadeghniiat-Haghighi
  • Ali Montazeri
  • Saharnaz Nedjat
Original Article



The aim of this study was the translation, cross-cultural adaptation, and validation of the Sleep Apnea Quality of Life Index (SAQLI) in Persian-speaking patients with obstructive sleep apnea (OSA).


Ninety-six patients with OSA completed a series of questionnaires including SAQLI, Epworth Sleepiness Scale (ESS),10-item Functional Outcomes of Sleep Questionnaire (FOSQ-10), and Medical Outcome Survey Short form 12 (SF-12) for assessment of reliability, validity, and responsiveness of Persian version of SAQLI.


The Persian version of SAQLI had a very good internal consistency and also demonstrated good test-retest reliability. Concurrent validity was confirmed by significant correlations with ESS, FOSQ-10 and SF-12 subscale scores. Comparison of SAQLI scores in groups of patients categorized by ESS showed the high discriminative power of this instrument. However, there was no significant difference in the SAQLI scores of patients with mild, moderate, and severe sleep apnea. The results of sensitivity to change verified that the SAQLI was able to detect changes after continuous positive airway pressure (CPAP) treatment.


The findings of this study indicate that the Persian version of SAQLI is a reliable, valid, and responsive measure for evaluation of quality of life in patients with OSA.


Translation Validity Reliability Sleep Apnea Quality of Life Index Persian version 


Conflict of interest

All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Sara Rahavi-Ezabadi
    • 1
  • Amin Amali
    • 2
    Email author
  • Khosro Sadeghniiat-Haghighi
    • 3
  • Ali Montazeri
    • 4
  • Saharnaz Nedjat
    • 5
  1. 1.Tehran University of Medical SciencesTehranIran
  2. 2.Occupational Sleep Research Center, Otorhinolaryngology Head and Neck Surgery DepartmentImam Khomeini Educational Complex Hospital, Valiasr Hospital, Tehran University of Medical SciencesTehranIran
  3. 3.Occupational Sleep Research CenterTehran University of Medical SciencesTehranIran
  4. 4.Health Metrics Research CenterIranian Institute for Health Sciences Research, ACECRTehranIran
  5. 5.Epidemiology and Biostatistics Department, School of Public HealthTehran University of Medical SciencesTehranIran

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