title: The validity of the Dutch Sleep Disorders Questionnaire (SDQ).
abstract: The Sleep Disorders Questionnaire (SDQ) is a 176-item questionnaire designed to diagnose the presence of common sleep disorders. This study set out to assess the validity of a Dutch translation of the SDQ. Scores on 145 questionnaires were analyzed. A cluster analysis of these scores revealed the following clusters: healthy, depression, insomnia, narcolepsy, and apnea. The cluster classification proved correct for 67% of the subjects, as determined on the basis of polysomnography. These results show that the Dutch SDQ is a reasonably valid instrument for diagnosing sleep disorders.
authors.affiliation: Center for Sleep and Wake Disorders, The Hague, The Netherlands. sweere@westeinde.ziekenhuis.nl
authors.forename: Y
authors.initials: Y
authors.lastname: Sweere
authors.forename: G A
authors.initials: GA
authors.lastname: Kerkhof
authors.forename: A W
authors.initials: AW
authors.lastname: De Weerd
authors.forename: H A
authors.initials: HA
authors.lastname: Kamphuisen
authors.forename: B
authors.initials: B
authors.lastname: Kemp
authors.forename: R J
authors.initials: RJ
authors.lastname: Schimsheimer
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016000:Cluster Analysis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D011569:Psychiatric Status Rating Scales / Q000592:standards*; D011594:Psychometrics; D015203:Reproducibility of Results; D012893:Sleep Wake Disorders / Q000175:diagnosis*; D011795:Surveys and Questionnaires / Q000592:standards*