title: Benign positional vertigo: incidence and prognosis in a population-based study in Olmsted County, Minnesota.
abstract: A retrospective review of our population-based medical records linkage system for residents of Olmsted County, Minnesota, revealed 53 patients (34 women and 19 men; mean age, 51 years) with newly diagnosed benign positional vertigo in 1984. The age- and sex-adjusted incidence was 64 per 100,000 population per year (95% confidence interval, 46 to 81 per 100,000). The incidence of benign positional vertigo increased by 38% with each decade of life (95% confidence interval, 23 to 54%). One patient had an initial stroke during follow-up; thus, the relative risk for new stroke associated with benign positional vertigo was 1.62 (95% confidence interval, 0.04 to 8.98) in comparison with the expected occurrence based on incidence rates for an age- and sex-adjusted control population. The observed survival among the 53 Olmsted County residents with benign positional vertigo diagnosed in 1984 was not significantly different from that of an age- and sex-matched general population. Patients with benign positional vertigo seem to have a good prognosis.
authors.affiliation: Division of Area Medicine, Mayo Clinic, Rochester, MN 55905.
authors.forename: D A
authors.initials: DA
authors.lastname: Froehling
authors.forename: M D
authors.initials: MD
authors.lastname: Silverstein
authors.forename: D N
authors.initials: DN
authors.lastname: Mohr
authors.forename: C W
authors.initials: CW
authors.lastname: Beatty
authors.forename: K P
authors.initials: KP
authors.lastname: Offord
authors.forename: D J
authors.initials: DJ
authors.lastname: Ballard
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002561:Cerebrovascular Disorders / Q000209:etiology; D006259:Craniocerebral Trauma / Q000150:complications; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D008910:Minnesota / Q000453:epidemiology; D009759:Nystagmus, Pathologic / Q000209:etiology; D011159:Population Surveillance; D011187:Posture; D011379:Prognosis; D012189:Retrospective Studies; D012306:Risk; D015996:Survival Rate; D014717:Vertigo / Q000150:complications / Q000453:epidemiology* / Q000503:physiopathology