title: Canalith repositioning maneuver for benign paroxysmal positional vertigo: randomized controlled trial in family practice.
abstract: OBJECTIVE
  To determine whether the canalith repositioning maneuver (CRM) is effective for treating benign paroxysmal positional vertigo when it is used by family physicians in primary care settings.
  
  
  METHODS
  Randomized, prospective, double-blind, sham-controlled trial.
  
  
  METHODS
  An academic family practice in Hamilton, Ont.
  
  
  METHODS
  Eighty-one patients 18 years or older whose dizziness was confirmed by the Dix-Hallpike (DH) vertigo-triggering maneuver and who had no contraindications to the CRM.
  
  
  METHODS
  At the first visit, the intervention group received the CRM and the control group received a sham maneuver. Both groups received the CRM at the second and third visits 1 and 2 weeks later.
  
  
  METHODS
  Negative results of the DH test or self-reported resolution of vertigo after the initial treatment.
  
  
  RESULTS
  Eighty-one patients were randomized and received the first treatment. After the first treatment, 34.2% of patients in the intervention group and 14.6% of patients in the control group had negative DH test results (relative risk 2.3, 95% confidence interval 1.03 to 5.2, P = .04); and 31.6% of patients in the intervention group and 24.4% of patients in the control group reported resolution of dizziness (relative risk 1.2, 95% confidence interval 0.7 to 1.9, P = .48). One week later, patients in both intervention and control groups received the CRM, and 61.8% and 57.1% of them, respectively, had negative DH test results (P = .81). By week 3, approximately 75% of patients in both groups had improved.
  
  
  CONCLUSIONS
  A statistically significant proportion of patients in the CRM group returned to a negative response to the DH maneuver immediately after the first treatment. Family physicians can use the CRM to treat benign paroxysmal positional vertigo and potentially avoid delays in treatment and unnecessary referrals.
  
  
  BACKGROUND
  NCT00182273 (ClinicalTrials.gov).
authors.affiliation: Department of Family Medicine, McMaster University, McMaster Family Practice, 690 Main St W, Suite A, Hamilton, ON L8S 1A4. munozj@mcmaster.ca
authors.forename: Juan E
authors.initials: JE
authors.lastname: Munoz
authors.forename: Jonel T
authors.initials: JT
authors.lastname: Miklea
authors.forename: Michelle
authors.initials: M
authors.lastname: Howard
authors.forename: Russ
authors.initials: R
authors.lastname: Springate
authors.forename: Janusz
authors.initials: J
authors.lastname: Kaczorowski
mesh_terms: D004311:Double-Blind Method; D005194:Family Practice / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011187:Posture; D011446:Prospective Studies; D012665:Semicircular Canals / Q000503:physiopathology; D016896:Treatment Outcome; D014717:Vertigo / Q000503:physiopathology / Q000628:therapy*