Dissociations among daytime sleepiness, nighttime sleep, and cognitive status in Parkinson's disease.

ABSTRACT:

Background

Daytime and nighttime sleep disturbances and cognitive impairment occur frequently in Parkinson's disease (PD), but little is known about the interdependence of these non-motor complications. Thus, we examined the relationships among excessive daytime sleepiness, nighttime sleep quality and cognitive impairment in PD, including severity and specific cognitive deficits.

Methods

Ninety-three PD patients underwent clinical and neuropsychological evaluations including the Epworth Sleepiness Scale (ESS) and Pittsburgh Sleep Quality Index (PSQI). Patients were classified as having normal cognition (PD-NC), mild cognitive impairment (PD-MCI), or dementia (PDD) using recently proposed Movement Disorder Society PD-MCI and PDD criteria. Relationships between the sleep and c

SUBMITTER: Goldman JG 

PROVIDER: S-EPMC3729741 | biostudies-literature | 2013 Sep

REPOSITORIES: biostudies-literature