title: The incidence and prevalence of idiopathic intracranial hypertension in Sheffield, UK.
abstract: OBJECTIVE
  The purpose of this study was to identify the incidence and prevalence of idiopathic intracranial hypertension (IIH) in Sheffield, UK.
  
  
  METHODS
  A retrospective review of case notes was conducted to identify cases of IIH seen between 1 January 2007 and 31 December 2008.
  
  
  RESULTS
  Sixteen (15 women and 1 man) new patients were identified to give an incidence within Sheffield of 1.56/100,000/year and 2.86/100,000/year for women. The incidence of IIH in obese women was 11.9/100,000/year. The prevalence of IIH was calculated as 10.9/100,000, and 85.7/100,000 in obese women.
  
  
  CONCLUSIONS
  A higher incidence of IIH than previously reported UK data was found, which may be because of increasing obesity within the population, or improved case ascertainment.
authors.affiliation: Department of Ophthalmology, Royal Hallamshire Hospital, Sheffield, UK.
authors.forename: N
authors.initials: N
authors.lastname: Raoof
authors.forename: B
authors.initials: B
authors.lastname: Sharrack
authors.forename: I M
authors.initials: IM
authors.lastname: Pepper
authors.forename: S J
authors.initials: SJ
authors.lastname: Hickman
mesh_terms: D000328:Adult; D015897:Comorbidity; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D009765:Obesity / Q000175:diagnosis / Q000453:epidemiology*; D015995:Prevalence; D011559:Pseudotumor Cerebri / Q000175:diagnosis* / Q000453:epidemiology*; D012189:Retrospective Studies; D006113:United Kingdom / Q000453:epidemiology; D055815:Young Adult