title: A comparison of polysomnography and a portable home sleep study in the diagnosis of obstructive sleep apnea syndrome.
abstract: OBJECTIVE
  To validate the role of a portable sleep monitor device (SNAP) in the diagnosis of obstructive sleep apnea syndrome (OSAS). Inter-reader variability was also assessed for both PSG and SNAP.
  
  
  METHODS
  Sixty consecutive adults referred for PSG at The University of Chicago Sleep Disorder Clinic were prospectively enrolled.
  
  
  RESULTS
  There was no significant difference between total number of apnea and hypopnea, respiratory disturbance index (RDI), and minimum oxygen obtained by PSG and SNAP, but there was a significant difference between sleep time and mean oxygen. Pearson's correlation coefficient for RDI > or = 15 was 0.92.
  
  
  CONCLUSIONS
  There was a significant correlation of RDIs between SNAP and PSG. SNAP has good sensitivity, specificity, positive and negative predictive values. Differences between SNAP and PSG could be attributed to inter-reader variability and not necessarily due to technical limitations of SNAP. SNAP is an excellent tool for the diagnosis of OSAS in the laboratory setting. Future studies should be performed to evaluate SNAP's accuracy in the home setting in the diagnosis of OSAS.
  
  
  METHODS
  B-2.
authors.affiliation: Department Surgery, Section of Otolaryngology--Head and Neck Surgery, The University of Chicago, Illinois 60637, USA.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Su
authors.forename: Fuad M
authors.initials: FM
authors.lastname: Baroody
authors.forename: Michael
authors.initials: M
authors.lastname: Kohrman
authors.forename: Dana
authors.initials: D
authors.lastname: Suskind
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006760:Hospitalization; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D017286:Polysomnography / Q000295:instrumentation / Q000379:methods*; D011446:Prospective Studies; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016037:Single-Blind Method; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis*