title: How common are various causes of dizziness? A critical review.
abstract: BACKGROUND
  Although dizziness is a common symptom in both primary care and referral practices, the relative frequency of various causes has not been well delineated.
  
  
  METHODS
  A MEDLINE search identified 12 articles containing original data on the etiology of dizziness in consecutive patients. Study sites included primary care offices (n = 2), emergency room (n = 4), and referral clinics (n = 6). Each study's strength of design was graded using nine quality criteria.
  
  
  RESULTS
  Dizziness was attributed to a peripheral vestibulopathy in 44% of patients, a central vestibulopathy in 11%, psychiatric causes in 16%, other conditions in 26%, and an unknown cause in 13%. Certain serious causes were relatively uncommon, including cerebrovascular disease (6%), cardiac arrhythmia (1.5%), and brain tumor (<1%).
  
  
  CONCLUSIONS
  Dizziness is due to vestibular or psychiatric causes in more than 70% of cases. Since serious treatable causes appear uncommon, diagnostic testing can probably be reserved for a small subset of patients.
authors.affiliation: Regenstrief Institute for Health Care and Indiana University School of Medicine, Indianapolis 46202-2859, USA.
authors.forename: K
authors.initials: K
authors.lastname: Kroenke
authors.forename: R M
authors.initials: RM
authors.lastname: Hoffman
authors.forename: D
authors.initials: D
authors.lastname: Einstadter
mesh_terms: D000328:Adult; D004244:Dizziness / Q000145:classification / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D001523:Mental Disorders / Q000150:complications; D012107:Research Design; D014481:United States / Q000453:epidemiology; D000160:Vestibulocochlear Nerve Diseases / Q000150:complications*