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The REM sleep behavior disorder screening questionnaire--a new diagnostic instrument
Karin Stiasny-Kolster1, Geert Mayer, Sylvia Schäfer
1Department of Neurology, Center of Nervous Diseases, Philipps-University, Marburg, Germany. stiasny@med.uni-marburg.de
Movement Disorders : Official Journal of the Movement Disorder Society
|September 27, 2007
Summary
The REM sleep behavior disorder screening questionnaire (RBDSQ) effectively identifies potential cases of REM sleep behavior disorder (RBD). Its high sensitivity makes it a valuable tool for early screening of RBD, aiding in the detection of evolving neurodegenerative disorders.
Area of Science:
- Neurology
- Sleep Medicine
- Neurodegenerative Diseases
Background:
- Idiopathic REM sleep behavior disorder (RBD) can be an early sign of neurodegenerative conditions like Parkinson's disease.
- Early detection is crucial for patient management and future neuroprotective research.
Purpose of the Study:
- To validate the 10-item REM sleep behavior disorder screening questionnaire (RBDSQ) as a diagnostic tool.
- To assess the RBDSQ's sensitivity and specificity in identifying patients with RBD.
Main Methods:
- The RBDSQ was administered to 54 patients with confirmed RBD and two control groups (160 RBD-negative subjects and 133 healthy subjects).
- Statistical analysis compared RBDSQ scores between groups and calculated sensitivity and specificity at a threshold of five points.
Main Results:
- The mean RBDSQ score was significantly higher in the RBD group (9.5) compared to control group 1 (4.6) and control group 2 (2.02).
- With a cutoff score of five, the RBDSQ demonstrated a sensitivity of 0.96 and a specificity of 0.56 against PSG-confirmed RBD.
- Specificity reached 0.92 when compared to healthy subjects without PSG confirmation.
Conclusions:
- The RBDSQ exhibits high sensitivity, making it a useful screening tool for REM sleep behavior disorder.
- While effective for screening, the RBDSQ has limitations in differentiating RBD from conditions like sleepwalking or epilepsy.
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