title: Variables affecting treatment in benign paroxysmal positional vertigo.
abstract: OBJECTIVE
  To identify variables affecting outcome in patients with benign paroxysmal positional vertigo (BPPV) treated with canalith repositioning maneuvers.
  
  
  METHODS
  Retrospective review of patients at a tertiary vestibular rehabilitation center.
  
  
  METHODS
  Variables identified for statistical analysis included method of diagnosis, age, sex, onset association with trauma, semicircular canal involvement, presence of bilateral disease, treatment visits, and cycles of canalith repositioning maneuvers per treatment visit. Multivariate statistical analysis using Pearson chi2, likelihood ratio, linear-by-linear association, and cross-tabulation tests were performed.
  
  
  RESULTS
  Two hundred fifty-nine patients with BPPV who received treatment were identified from 1996 to 1998. Average follow-up time was 16.9 months. 74.8% required one treatment visit, 19.0% required a second treatment visit, and 98.4% were successfully treated after three treatment visits. The remainder required up to seven treatment visits for relief of symptoms. Variables affecting the number of treatment visits included bilateral disease or location of disease other than in the posterior semicircular canal. Patient age, sex, method of diagnosis, and onset association with trauma had no statistically significant impact.
  
  
  CONCLUSIONS
  Patients with benign paroxysmal positional vertigo not located in a single posterior semicircular canal are more likely to require multiple visits for canalith repositioning.
authors.affiliation: Macias Otology, Phoenix, Arizona, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Macias
authors.forename: K M
authors.initials: KM
authors.lastname: Lambert
authors.forename: S
authors.initials: S
authors.lastname: Massingale
authors.forename: A
authors.initials: A
authors.lastname: Ellensohn
authors.forename: J A
authors.initials: JA
authors.lastname: Fritz
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D012044:Regression Analysis; D019233:Retreatment; D012189:Retrospective Studies; D016896:Treatment Outcome; D014717:Vertigo / Q000628:therapy*