Korean J Rehabil Nurs.  2014 Jun;17(1):10-17.

Psychometric Properties of Korean Version of Modified Leeds Sleep Evaluation Questionnaire (KMLSEQ)

• Kim I
• Choi H
• Kim B

Abstract

PURPOSE
The Leeds Sleep Evaluation Questionnaire (LSEQ) translated into Korean was modified to easily apply and reduce respondents' confusion and was evaluated for psychometric properties and discriminant ability.
METHODS
A total of 960 Korean adults aged 45 years and older participated in this cross-sectional survey. To test reliability, validity and discriminant ability, Cronbach's alpha, correlation analysis, confirmatory factor analysis, simple regression analysis and receiver operating characteristics (ROC) curve analysis were used.
RESULTS
Item-total correlations ranged between .62~.85 and Cronbach's alpha was .95. Area under ROC was .86 (95% CI: .83~.90) and the optimal cutoff score was identified as < or = 66 (sensitivity, .77; specificity, .84; positive/negative predictive values, .49/.95). Using this cutoff score, the prevalence of insomnia in the study sample was 25.8% and tended to be more common in female and older groups.
CONCLUSION
The data supported the psychometric properties of Korean Modified Leeds Sleep Evaluation Questionnaire (KMLSEQ) as an acceptable sleep measurement. In addition, KMLSEQ is likely to be a useful screening tool for insomnia.

Keyword

Sleep; Self-report; Questionnaire; Psychometrics

MeSH Terms

Adult
Cross-Sectional Studies
Female
Humans
Mass Screening
Prevalence
Psychometrics*
Surveys and Questionnaires*
ROC Curve
Sensitivity and Specificity
Sleep Initiation and Maintenance Disorders