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The validity of the Dutch Sleep Disorders Questionnaire (SDQ)
Y Sweere1, G A Kerkhof, A W De Weerd
1Center for Sleep and Wake Disorders, The Hague, The Netherlands. sweere@westeinde.ziekenhuis.nl
Journal of Psychosomatic Research
|December 22, 1998
Summary
The Dutch Sleep Disorders Questionnaire (SDQ) shows reasonable validity in diagnosing common sleep disorders like insomnia and narcolepsy. This validated tool aids in identifying sleep issues through cluster analysis.
Area of Science:
- Sleep Medicine
- Psychometrics
Background:
- The Sleep Disorders Questionnaire (SDQ) is a comprehensive tool for diagnosing sleep disorders.
- Assessing the validity of translated diagnostic instruments is crucial for clinical application.
Purpose of the Study:
- To evaluate the validity of the Dutch translation of the Sleep Disorders Questionnaire (SDQ).
- To determine if the SDQ can accurately differentiate between various sleep disorder clusters.
Main Methods:
- A cluster analysis was performed on scores from 145 completed Dutch SDQ questionnaires.
- Polysomnography was used as the gold standard to determine the accuracy of the cluster classifications.
Main Results:
- Cluster analysis identified distinct groups: healthy, depression, insomnia, narcolepsy, and apnea.
- The Dutch SDQ achieved a 67% accuracy rate in classifying subjects based on polysomnography findings.
Conclusions:
- The Dutch version of the Sleep Disorders Questionnaire is a reasonably valid instrument for diagnosing sleep disorders.
- The SDQ demonstrates utility in identifying and differentiating common sleep conditions in a Dutch population.