title: Relationship Between Snoring Intensity and Severity of Obstructive Sleep Apnea.
abstract: OBJECTIVE
  The aim of this study was to determine the relationship between the intensity of snoring and severity of sleep apnea using Watch-PAT (peripheral arterial tone) 100.
  
  
  METHODS
  A total of 404 patients (338 males and 66 females) who underwent home-based portable sleep study using Watch-PAT 100 for obstructive sleep apnea (OSA) from January 2009 through December 2011 were included in this study. Subjects were divided into 4 groups; no OSA (PAT apnea hypopnea index [pAHI]<5/hour), mild OSA (5≤pAHI<15/hour), moderate OSA (15≤pAHI<30/hour), or severe OSA groups (pAHI≥30/hour). Mean snoring intensity and percent sleep time with snoring intensity greater than 40, 50, and 60 dB were measured by Watch-PAT 100. Correlations of these parameters with apnea hypopnea index (AHI), respiratory disturbance index (RDI), and oxygen desaturation index were assessed.
  
  
  RESULTS
  The mean age and body mass index were 46.5±14.8 years and 24.7±3.4 kg/m(2), respectively. Mean AHI and RDI were 16.5±15.3/hour and 20.8±14.3/hour, respectively. The mean snoring intensity in the no, mild, moderate, and severe OSA groups was 44.0±2.7, 45.4±6.0, 47.7±5.0, and 50.5±5.6 dB, respectively (P<0.001). There was a positive correlation between snoring intensity and pAHI or PAT RDI (pRDI) (r=0.391 and r=0.385, respectively, both P<0.001). There was also a positive correlation between percent sleep time with the snoring intensity greater than 50 dB and pAHI or pRDI (r=0.423 and r=0.411, respectively, both P<0.001).
  
  
  CONCLUSIONS
  This study revealed that the intensity of snoring increased with the severity of sleep apnea, which suggests that the loudness of snoring might be an indicator of the severity of OSA.
authors.affiliation: Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
authors.forename: Jeong-Whun
authors.initials: JW
authors.lastname: Kim
authors.affiliation: Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
authors.forename: Chul Hee
authors.initials: CH
authors.lastname: Lee
authors.affiliation: Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
authors.forename: Chae Seo
authors.initials: CS
authors.lastname: Rhee
authors.affiliation: Department of Otorhinolaryngology, Dankook University College of Medicine, Cheonan, Korea.
authors.forename: Ji-Hun
authors.initials: JH
authors.lastname: Mo
keywords: Desaturation; Obstructive Sleep Apnea; Snoring; Watch-PAT 100