title: Development of daytime somnolence over time in Parkinson's disease.
abstract: The authors examined the development over time of excessive daytime sleepiness (EDS) in patients with PD by evaluating EDS among 142 patients in 1993 and 4 years later. Eleven patients were diagnosed with EDS in 1993. In all of these patients, EDS persisted 4 years later. During follow-up, 30 new patients had EDS (6% new patients per year). In 1997, 29% of the patients with PD had EDS. The development of EDS correlated with more advanced disease and dementia.
authors.affiliation: Department of Neurology, Central Hospital of Rogaland, Stavanger, Norway.
authors.forename: M D
authors.initials: MD
authors.lastname: Gjerstad
authors.forename: D
authors.initials: D
authors.lastname: Aarsland
authors.forename: J P
authors.initials: JP
authors.lastname: Larsen
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D016009:Chi-Square Distribution; D002940:Circadian Rhythm; D006970:Disorders of Excessive Somnolence / Q000453:epidemiology / Q000209:etiology* / Q000503:physiopathology; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D015999:Multivariate Analysis; D010300:Parkinson Disease / Q000150:complications* / Q000453:epidemiology / Q000503:physiopathology; D015995:Prevalence