Open Access Original Research

Sleep Symptoms Differentially Predict Cognition in Younger and Older-Onset Parkinson's Disease

Received: 13 May 2019;  Published: 23 September 2019;  doi: 10.21926/obm.geriatr.1903075


Abstract Background: Both disrupted sleep and cognitive impairment are frequent in Parkinson’s disease (PD), but the evidence for a relationship between self-reported sleep disturbance and cognitive symptoms has been equivocal. If sleep symptoms differentially predict cognition in different subtypes, effects may be obscured in a general [...]