A single‐question screen for rapid eye movement sleep behavior disorder: A multicenter validation study

Idiopathic rapid eye movement (REM) sleep behavior disorder (RBD) is a parasomnia that is an important risk factor for Parkinson's disease (PD) and Lewy body dementia. Its prevalence is unknown. One barrier to determining prevalence is that current screening tools are too long for large‐scale epidemiologic surveys. Therefore, we designed the REM Sleep Behavior Disorder Single‐Question Screen (RBD1Q), a screening question for dream enactment with a simple yes/no response.

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