Validity and reliability of Sleep Quality Scale in subjects with obstructive sleep apnea syndrome

Hyeryeon Yi, Kyungrim Shin, Jinyoung Kim, Jeongsun Kim, Jung Bok Lee, Chol Shin

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Objective: The present study aimed to evaluate the validity and reliability of Sleep Quality Scale (SQS) in subjects with obstructive sleep apnea syndrome (OSAS). Methods: The known group technique was used for construct validity. The study sample was composed of 40 persons with OSAS and 37 normal subjects. OSAS was defined as an apnea-hypopnea index (AHI) of ≥5 plus an Epworth Sleepiness Scale (ESS) score of >10. Control group was composed of subjects who had no history of depression and sleep problems as identified by self-report and polysomnography. A Cronbach's alpha coefficient was used for internal consistency. Results: The total SQS score of the OSAS subjects was significantly higher than that of the normal subjects. The SQS score homogeneity was high with a Cronbach's alpha coefficient of 0.90 in all subjects, 0.87 in the OSAS subjects, and 0.70 in the normal subjects. Conclusion: SQS was confirmed to be an instrument with validity and high reliability for measuring sleep quality in OSAS subjects.

Original languageEnglish
Pages (from-to)85-88
Number of pages4
JournalJournal of Psychosomatic Research
Volume66
Issue number1
DOIs
Publication statusPublished - 2009 Jan

Keywords

  • Reliability
  • Sleep Quality Scale
  • Validity

ASJC Scopus subject areas

  • Clinical Psychology
  • Psychiatry and Mental health

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