title: [The frequency and properties of REM related obstructive sleep apnea among the patients with mild related obstructive sleep apnea].
abstract: BACKGROUND
  The question if REM related obstructive sleep apnea (OSA) is a specific clinical entity or if it is an early sign of severe sleep disordered breathing as there is high occurrence of REM OSA in mild and moderate cases, recently have attracted the investigators. In this study, we aimed to see the frequency of REM related OSA among patients with mild OSA; and also to evaluate relation between apnea and daytime sleepiness among REM related OSA patients.
  
  
  METHODS
  One hundred thirty four patients with mild OSA [Apnea hipopnea index (AHI)= 5-15] among 1267 patients with polysomnography examination at sleep laboratory of Bezmialem University Hospital between 1st August 2010 and 29th February 2012 were retrospectively evaluated. Patients having REM AHI/non-REM AHI ≥ 2 and non-REM AHI < 15 are considered as REM related OSA.
  
  
  RESULTS
  Eighty (59%) of 134 patients with mild OSA were considered as REM related OSA. When REM related OSA and non REM OSA are compared for age, gender, daytime sleepiness, body mass index, neck surround and aditional diseases; mean age of REM related OSA group was found only significantly lower. Number of AHI in REM was over 15 at 87.3% of REM related OSA group and over 30 at 39.3% of them. There was no relation between REM AHI and daytime sleepiness symptom (p= 0.81).
  
  
  CONCLUSIONS
  We may consider the result of lower mean age in REM related OSA group as a supporting result for early sign of severe sleep disordered breathing. We consider to follow up this group of patients to answer the question about subject.
authors: Department of Chest Diseases, Faculty of Medicine, Bezmialem Vakıf University, Istanbul, Turkey. hkutbay54@hotmail.com.
authors: Hatice
authors: H
authors: Kutbay Özçelik
authors: Muhammed Emin
authors: ME
authors: Akkoyunlu
authors: Pınar
authors: P
authors: Bostanlı
authors: Mehmet
authors: M
authors: Bayram
authors: Ersan
authors: E
authors: Atahan
authors: Murat
authors: M
authors: Sezer
authors: Fatmanur
authors: F
authors: Karaköse
authors: Levent
authors: L
authors: Kart
mesh_terms: D000367:Age Factors; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D012189:Retrospective Studies; D012737:Sex Factors; D012891:Sleep Apnea Syndromes / Q000175:diagnosis* / Q000453:epidemiology; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis* / Q000453:epidemiology; D012895:Sleep, REM / Q000502:physiology*