title: Psychiatric disorders and functional impairment in patients with persistent dizziness.
abstract: OBJECTIVE
  To determine the prevalence and predictors of psychiatric dizziness and to measure functional impairment associated with dizziness.
  
  
  METHODS
  Consecutive outpatients with a chief complaint of dizziness.
  
  
  METHODS
  Four outpatient clinics at a military teaching hospital.
  
  
  METHODS
  100 dizzy patients and 25 control patients.
  
  
  RESULTS
  Structured psychiatric interviews were conducted using the Diagnostic Interview Schedule, and functional status was assessed with the Sickness Impact Profile and the 20-item MOS (Medical Outcomes Study) Short-Form. Psychiatric disorders were a primary or contributory cause of dizziness for 40% of the dizzy patients. Compared with the control patients, the dizzy patients had a higher lifetime (46% vs 32%) as well as recent (37% vs 20%) prevalence of axis I disorders. The greatest differences were in disorders of depression and somatization. The dizzy patients had a higher lifetime prevalence (23% vs 8%) as well as recent history (11% vs 0%) of major depression or dysthymia. Also, somatization disorders were strikingly more common among the dizzy patients than among the control patients (37% vs 8%, p = 0.005), with the dizzy patients reporting more than three times as many psychiatric or unexplained physical symptoms (5.2 vs 1.5). Age < 40 years, related complaints of weakness or headaches, and dizziness provoked by hyperventilation or standing were independent predictors of psychiatric dizziness. The dizzy patients reported moderate functional impairment, which was most severe among those with psychiatric disorders.
  
  
  CONCLUSIONS
  Persistent dizziness is associated with increased functional impairment and psychiatric comorbidity, particularly depression and somatization. Moreover, psychiatric disorders aggravate the impairment that occurs with dizziness alone.
authors.affiliation: Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814.
authors.forename: K
authors.initials: K
authors.lastname: Kroenke
authors.forename: C A
authors.initials: CA
authors.lastname: Lucas
authors.forename: M L
authors.initials: ML
authors.lastname: Rosenberg
authors.forename: B J
authors.initials: BJ
authors.lastname: Scherokman
mesh_terms: D000368:Aged; D003863:Depression / Q000150:complications*; D004244:Dizziness / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006304:Health Status; D006801:Humans; D007406:Interview, Psychological; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies; D013001:Somatoform Disorders / Q000150:complications*; D011795:Surveys and Questionnaires