title: Comparison of polysomnographic and portable home monitoring assessments of obstructive sleep apnea in Saskatchewan women.
abstract: OBJECTIVE
  To compare a commercially available, level III in-home diagnostic sleep test (Embletta, Embletta USA) and in-laboratory polysomnography (PSG) in women with suspected obstructive sleep apnea (OSA).
  
  
  METHODS
  Consecutive women scheduled for routine PSG testing for evaluation of clinically suspected OSA and who met inclusion⁄exclusion criteria, were invited to participate. An in-home Embletta portable monitor test was performed one week before or after diagnostic PSG.
  
  
  RESULTS
  Forty-seven of 96 women who met the inclusion⁄exclusion criteria agreed to participate. The mean (± SD) age of the patients was 52.0 ± 11.0 years, with a mean body mass index of 34.86 ± 9.04 kg⁄m2, and 66% (31 of 47) of patients were at high risk for OSA according to the Berlin score. Paired analysis of the overall population revealed no significant difference in mean apnea⁄hypopnea index (AHI) between the two diagnostic methods (P = 0.475). At an AHI of ≥ 5, the Embletta test was highly sensitive (90.6%) in determining abnormal versus normal OSA, with a positive predictive value of 82.7%. However, a higher Embletta AHI threshold of ≥ 10 may be more useful, with a higher level of agreement (kappa coefficient) with PSG testing and a positive predictive value of 92.3%. The in-home study was less useful at distinguishing severe from nonsevere OSA, yielding a sensitivity of 50%.
  
  
  CONCLUSIONS
  In women believed to be at high-risk for OSA, Embletta in-home sleep testing is useful for the detection of sleep disordered breathing.
authors.affiliation: Division of Respiratory, Critical Care and Sleep Medicine, University of Saskatchewan, Saskatoon, Saskatchewan. john.gievre@usask.ca
authors.forename: J A
authors.initials: JA
authors.lastname: Gjevre
authors.forename: R M
authors.initials: RM
authors.lastname: Taylor-Gjevre
authors.forename: R
authors.initials: R
authors.lastname: Skomro
authors.forename: J
authors.initials: J
authors.lastname: Reid
authors.forename: M
authors.initials: M
authors.lastname: Fenton
authors.forename: D
authors.initials: D
authors.lastname: Cotton
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods*; D017286:Polysomnography; D011446:Prospective Studies; D012372:ROC Curve; D012525:Saskatchewan; D012648:Self Care; D012680:Sensitivity and Specificity; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis*; D055815:Young Adult