title: Establishment and baseline characteristics of a nationwide Danish cohort of patients with Ehlers-Danlos syndrome.
abstract: The aim of this study was to investigate national prevalence, general demographic characteristics and survival of Danish patients with Ehlers-Danlos syndrome (EDS).
  
  
  
  A population-based cohort study was conducted using a database consisting of the entire Danish population alive at any given time between 1 January 2000 and 31 December 2012, based upon longitudinal Danish national registers. All patients with EDS were identified, and the cohort was described by disease prevalence, basic demographic characteristics, mean age at death and mortality for the observational period of 13 years.
  
  
  
  The cohort held 1427 unique persons with EDS, giving a national prevalence of 0.02%. The EDS population had a mean ( s . d .) age of 34.9 (18.6) years and comprised 73.9% females and 26.1% males. Of the cohort, 95.9% originated from Denmark and 57% were unmarried. We found that 31.6% of the cohort received state-granted subsidies, of which 77% were in the form of early retirement pension. Regarding educational status, 28.1% of the EDS cohort had completed primary education (⩽10th grade) as their highest educational level, while 71.9% had completed a higher level. During the observation period, 42 patients died, with a mean ( s . d .) age at death of 53.6 (21.7) years.
  
  
  
  This study confirmed a small national prevalence of patients diagnosed with EDS and showed that the majority of patients diagnosed are female. The EDS cohort had a lower educational level, mean age and life expectancy compared with the background population and showed a predisposition for receiving state-granted subsidies.
authors.affiliation: Gastro Unit, Department of Surgery, Herlev Hospital, Center for Perioperative Optimization, Herlev.
authors.forename: Marie-Louise
authors.initials: ML
authors.lastname: Kulas Søborg
authors.affiliation: Gastro Unit, Department of Surgery, Herlev Hospital, Center for Perioperative Optimization, Herlev.
authors.forename: Julie
authors.initials: J
authors.lastname: Leganger
authors.affiliation: Gastro Unit, Department of Surgery, Herlev Hospital, Center for Perioperative Optimization, Herlev.
authors.forename: Laura
authors.initials: L
authors.lastname: Quitzau Mortensen
authors.affiliation: Gastro Unit, Department of Surgery, Herlev Hospital, Center for Perioperative Optimization, Herlev.
authors.forename: Jacob
authors.initials: J
authors.lastname: Rosenberg
authors.affiliation: Department of Surgery, Zealand University Hospital, Køge, Denmark.
authors.forename: Jakob
authors.initials: J
authors.lastname: Burcharth
mesh_terms: D000328:Adult; D015331:Cohort Studies; D003718:Denmark / Q000453:epidemiology; D004522:Educational Status; D004535:Ehlers-Danlos Syndrome / Q000401:mortality*; D005260:Female; D006801:Humans; D008017:Life Expectancy; D008297:Male; D017533:Marital Status; D008875:Middle Aged; D015995:Prevalence
keywords: Denmark; Ehlers–Danlos syndrome; cohort; demography; epidemiology; register