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BackgroundThe Parkinson's Disease Sleep Scale (PDSS)‐2 is a recently developed tool for evaluating disease‐related nocturnal disturbances in patients with Parkinson's disease (PD). However, its cutoff score has not been clinically assessed. We determined the optimal cutoff score of the Japanese version of the PDSS‐2.
MethodsPatients with PD (n = 146) and controls (n = 100) completed the PDSS‐2 and...
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