The validity of the Dutch Sleep Disorders Questionnaire (SDQ).
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.
Sweere
Y
Y
Center for Sleep and Wake Disorders, The Hague, The Netherlands. sweere@westeinde.ziekenhuis.nl
Kerkhof
G A
GA
De Weerd
A W
AW
Kamphuisen
H A
HA
Kemp
B
B
Schimsheimer
R J
RJ
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*