Initial validation of the SLEEP-50 questionnaire |
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Authors: | Spoormaker Victor I Verbeek Ingrid van den Bout Jan Klip Ed C |
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Affiliation: | a Department of Clinical Psychology, Utrecht University, The Netherlands.b Center for Sleep and Wake Disorders, Kempenhaeghe, The Netherlands.c Department of Medical Psychology, University of Groningen, The Netherlands. |
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Abstract: | Initial psychometric properties of the SLEEP-50 questionnaire, designed to detect sleep disorders as listed in the Diagnostic and Statistical Manual of Mental Disorders (4th ed., Text Revision), were examined. The sample consisted of 377 college students, 246 sleep patients, 32 nightmare sufferers, and 44 healthy volunteers. The internal consistency was high (Cronbach's alpha = .85); test-retest correlations fell between .65 and .89. Principal component analysis with a direct oblimin rotation revealed a factor structure that closely matched the designed structure. Sensitivity and specificity scores were promising for all sleep disorders; the agreement between all clinical diagnoses and SLEEP-50-classifications was substantial (kappa = .77). These initial findings indicate that the SLEEP-50 seems able to detect a variety of sleep disorders. The SLEEP-50 can aid in screening for common sleep disorders in the general population. |
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