Reliability and Validity of the Women's Health Initiative Insomnia Rating Scale

The reliability and construct validity of the 5-item Women's Health Initiative Insomnia Rating Scale (WHIIRS) were evaluated in 2 studies. In Study 1, using a sample of 66,269 postmenopausal women, validity of the WHIIRS was assessed by examining its relationship to other measures known to be r...

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Bibliographic Details
Published in:Psychological assessment 2003-06, Vol.15 (2), p.137-148
Main Authors: Levine, Douglas W, Kripke, Daniel F, Kaplan, Robert M, Lewis, Megan A, Naughton, Michelle J, Bowen, Deborah J, Shumaker, Sally A
Format: Article
Language:English
Subjects:
Aged
Biological and medical sciences
Female
Health
Human
Human Females
Humans
Insomnia
Medical sciences
Menopause
Middle Aged
Population Surveillance
Postmenopause
Psychological tests
Psychology. Psychoanalysis. Psychiatry
Psychometrics
Psychometrics. Diagnostic aid systems
Psychopathology. Psychiatry
Rating Scales
Reliability
Reproducibility of Results
Sampling Studies
Sleep
Sleep Initiation and Maintenance Disorders - diagnosis
Sleep Initiation and Maintenance Disorders - epidemiology
Sleep Quality
Surveys and Questionnaires
Techniques and methods
Test Construction
Test Reliability
Test Validity
Validity
Women
Women's Health
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Summary:The reliability and construct validity of the 5-item Women's Health Initiative Insomnia Rating Scale (WHIIRS) were evaluated in 2 studies. In Study 1, using a sample of 66,269 postmenopausal women, validity of the WHIIRS was assessed by examining its relationship to other measures known to be related to sleep quality. Reliability of the WHIIRS was estimated using a resampling approach; the mean alpha coefficient was.78. Test-retest reliability coefficients were.96 for same-day administration and.66 after a year or more. Correlations of the WHIIRS with the other measures were in the predicted directions. Study 2 used a sample of 459 women and compared the WHIIRS with objective indicators of sleep quality. Results showed that differences in the objective indicators could be detected by the WHIIRS. Findings suggest that a between-group mean difference of approximately 0.50 of a standard deviation on the WHIIRS may be clinically meaningful.
ISSN:1040-3590
1939-134X
DOI:10.1037/1040-3590.15.2.137