title: Neural network prediction of obstructive sleep apnea from clinical criteria.
abstract: OBJECTIVE
  Clinical prediction models for the diagnosis of obstructive sleep apnea (OSA) have lacked the accuracy necessary to confidently replace polysomnography (PSG). Artificial neural networks are computer programs that can be trained to predict outcomes based on experience. This study was conducted to test the hypothesis that a generalized regression neural network (GRNN) could accurately classify patients with OSA from clinical data.
  
  
  METHODS
  Retrospective review.
  
  
  METHODS
  Regional sleep referral center.
  
  
  METHODS
  Randomly selected records of patients referred for possible OSA.
  
  
  METHODS
  The neural network was trained using 23 clinical variables from 255 patients, and the predictive performance was evaluated using 150 other patients.
  
  
  RESULTS
  The prevalence of OSA in this series of 405 patients (293 men and 112 women) was 69%. The trained GRNN had an accuracy of 91.3% (95% confidence interval [CI], 86.8 to 95.8). The sensitivity was 98.9% for having OSA (95% CI, 96.7 to 100), and the specificity was 80% (95% CI, 70 to 90). The positive predictive value that the patient would have OSA was 88.1% (95% CI, 81.8 to 94.4), whereas the negative predictive value that the patient would not have OSA (if so classified) was 98% (95% CI, 94 to 100).
  
  
  CONCLUSIONS
  Appropriately trained GRNN has the ability to accurately rule in OSA from clinical data, and GRNN did not misclassify patients with moderate to severe OSA. In this study, use of the neural network could have reduced the number of PSG studies performed. Prospective validation of the neural network for the diagnosis of OSA is now required.
authors.affiliation: Department of Otolaryngology, The University of Western Ontario, London, Canada.
authors.forename: S D
authors.initials: SD
authors.lastname: Kirby
authors.forename: P
authors.initials: P
authors.lastname: Eng
authors.forename: W
authors.initials: W
authors.lastname: Danter
authors.forename: C F
authors.initials: CF
authors.lastname: George
authors.forename: T
authors.initials: T
authors.lastname: Francovic
authors.forename: R R
authors.initials: RR
authors.lastname: Ruby
authors.forename: K A
authors.initials: KA
authors.lastname: Ferguson
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016571:Neural Networks, Computer; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012891:Sleep Apnea Syndromes / Q000175:diagnosis*