title: Home unattended vs hospital telemonitored polysomnography in suspected obstructive sleep apnea syndrome: a randomized crossover trial.
abstract: OBJECTIVE
  To compare home unattended polysomnography (H-PSG) with polysomnography performed in a local hospital and telemonitored by a sleep laboratory (T-PSG) in the diagnosis of obstructive sleep apnea syndrome (OSAS).
  
  
  METHODS
  Randomized crossover trial.
  
  
  METHODS
  Ninety-nine patients with suspected OSAS who underwent H-PSG and T-PSG on 2 consecutive nights, according to a randomized order.
  
  
  METHODS
  H-PSG and T-PSG were compared in terms of (1) effectiveness, only recordings providing interpretable signals from at least one EEG, the electro-oculograph, the electromyograph, air flow, thoracic or abdominal movements, and arterial oxygen saturation for 180 min of sleep were considered to be effective; (2) patient preference assessed by a questionnaire; and (3) polysomnographic indexes and final interpretative results in patients for whom both recordings were legible.
  
  
  RESULTS
  Recordings were considered to be ineffective in 11.2% of T-PSG (95% confidence interval [CI], 4.9 to 17.4%) and in 23.4% of H-PSG (95% CI, 19.12 to 27.68%). Thermistor problems were the main cause of failure of H-PSG. Forty-one percent of patients preferred H-PSG, and 55% preferred T-PSG. H-PSG and T-PSG did not differ in terms of sleep and respiratory indexes in the 65 patients in whom both recordings were legible. H-PSG and T-PSG were concordant in 58 of 65 patients using a 10-event-per-hour apnea-hypopnea index cutoff value for the diagnosis of OSAS.
  
  
  CONCLUSIONS
  T-PSG is clearly superior to H-PSG from a technical point of view and tends to be preferred by patients. The site of recording (home vs hospital) has no influence on polysomnographic indexes.
authors.affiliation: Service de Pneumologie, Hôpital de Versailles, le Chesnay, France. gagnadoux@sat.ap-hop-paris.fr
authors.forename: Frédéric
authors.initials: F
authors.lastname: Gagnadoux
authors.forename: Nathalie
authors.initials: N
authors.lastname: Pelletier-Fleury
authors.forename: Carole
authors.initials: C
authors.lastname: Philippe
authors.forename: Dominique
authors.initials: D
authors.lastname: Rakotonanahary
authors.forename: Bernard
authors.initials: B
authors.lastname: Fleury
mesh_terms: D018592:Cross-Over Studies; D006801:Humans; D008875:Middle Aged; D017286:Polysomnography / Q000379:methods*; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis*; D013686:Telemetry