title: Comparison of Polysomnography and Multiple Sleep Latency Test Findings in Subjects with Narcolepsy and İdiopathic Hypersomnia.
abstract: BACKGROUND
  Both narcolepsy and idiopathic hypersomnia are the main causes of excessive daytime sleepiness. In this study, we aimed to compare polysomnography (PSG) and multiple sleep latency test (MSLT) findings in narcolepsy and idiopathic hypersomnia patients.
  
  
  METHODS
  The files of patients with narcolepsy and hypersomnia who were admitted between 1995 and 2009 were reviewed. We evaluated data from 94 patients with narcolepsy with cataplexy, 49 with narcolepsy without cataplexy and 140 patients with idiopathic hypersomnia.
  
  
  RESULTS
  Sleep latency and REM latency were longer in idiopathic hypersomnia group than in narcolepsy with and without cataplexy group. Mean sleep latency in MSLT was the shortest in narcolepsy with cataplexy group. There was no difference in sleep efficiency, percentage of sleep stage and number of awakenings in PSG between three groups.
  
  
  CONCLUSIONS
  The findings of the study indicated that narcolepsy patients differ from idiopathic hypersomnia patients in terms of sleep latency and REM latency in PSG.
authors.affiliation: Gülhane Military Medical Academy, Division of Psychiatry, Ankara, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Erdem
authors.affiliation: Gülhane Military Medical Academy, Division of Psychiatry, Ankara, Turkey.
authors.forename: Abdullah
authors.initials: A
authors.lastname: Bolu
authors.affiliation: Gülhane Military Medical Academy, Division of Psychiatry, Ankara, Turkey.
authors.forename: A Gazi
authors.initials: AG
authors.lastname: Ünlü
authors.affiliation: Gülhane Military Medical Academy, Division of Psychiatry, Ankara, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Alper
authors.affiliation: Gülhane Military Medical Academy, Division of Psychiatry, Ankara, Turkey.
authors.forename: Sinan
authors.initials: S
authors.lastname: Yetkin
keywords: Narcolepsy; idiopathic hypersomnia; multiple sleep latency test; polysomnography