title: Incidence and prevalence of keratoconus in Denmark.
abstract: OBJECTIVE
  To estimate the prevalence and incidence of hospitalized keratoconus (KC) in Denmark.
  
  
  METHODS
  Data extracts from the National Patient Registry under the National Board of Health (which covers the entire Danish population) were analysed.
  
  
  RESULTS
  The prevalence of KC was estimated at 86 patients per 100,000 residents and the incidence at 1.3 per 100 000 per year.
  
  
  CONCLUSIONS
  KC is rather widespread in Denmark, with more than 4600 affected individuals.
authors.affiliation: Department of Ophthalmology, Aarhus University Hospital, Aarhus, Denmark. nikim@as.aaa.dk
authors.forename: Kim
authors.initials: K
authors.lastname: Nielsen
authors.forename: Jesper
authors.initials: J
authors.lastname: Hjortdal
authors.forename: Ellen
authors.initials: E
authors.lastname: Aagaard Nohr
authors.forename: Niels
authors.initials: N
authors.lastname: Ehlers
mesh_terms: D003718:Denmark / Q000453:epidemiology; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D007640:Keratoconus / Q000453:epidemiology* / Q000628:therapy*; D008875:Middle Aged; D015995:Prevalence; D012042:Registries