title: The Danish National Database for Obstructive Sleep Apnea.
abstract: OBJECTIVE
  The aim of the Danish National Database for Obstructive Sleep Apnea (NDOSA) was to evaluate the clinical quality (diagnostic, treatment, and management) for obstructive sleep apnea and obesity hypoventilation syndrome in Denmark using a real-time national database reporting to the Danish National Patient Registry.
  
  
  METHODS
  All patients diagnosed with obstructive sleep apnea or obesity hypoventilation syndrome at public and private in- and out-hospital departments in Denmark were included.
  
  
  METHODS
  The NDOSA contains information about baseline characteristics, comorbidity, diagnostic procedures conducted, treatment (continuous positive airway pressure and similar treatments, surgery, mandibular advancement devices, etc) complications, and treatment status.
  Yearly report with indicators for diagnostic procedures, treatment, and follow-up comparing different departments was involved in the management of sleep apnea in Denmark for the purpose of quality improvement.
  
  
  CONCLUSIONS
  The NDOSA has proven to be a real-time national database using diagnostic and treatment procedures reported to the Danish National Patient Registry.
authors.affiliation: Department of Clinical Neurophysiology, Faculty of Health Sciences, Danish Center for Sleep Medicine, University of Copenhagen, Rigshospitalet, Copenhagen.
authors.forename: Poul Jørgen
authors.initials: PJ
authors.lastname: Jennum
authors.affiliation: Section of Respiratory Disease, Medical Department, Fredericia Hospital, Fredericia.
authors.forename: Preben
authors.initials: P
authors.lastname: Larsen
authors.affiliation: Registry Support Centre (East) - Epidemiology and Biostatistics, Research Centre for Prevention and Health.
authors.forename: Charlotte
authors.initials: C
authors.lastname: Cerqueira
authors.affiliation: Registry Support Centre (East) - Clinical Quality Improvement and Health Informatics, Capital Region of Denmark, Copenhagen, Denmark.
authors.forename: Thor
authors.initials: T
authors.lastname: Schmidt
authors.affiliation: Department of Clinical Neurophysiology, Faculty of Health Sciences, Danish Center for Sleep Medicine, University of Copenhagen, Rigshospitalet, Copenhagen.
authors.forename: Philip
authors.initials: P
authors.lastname: Tønnesen
keywords: clinical registry; obesity hypoventilation syndrome; obstructive sleep apnea; quality of care