RANDOMIZED TRIAL OF THE CANALITH REPOSITIONING PROCEDURE

Thirty-six subjects with confirmed, unilateral benign paroxysmal posit ioning vertigo of at least 2 months' duration were randomly assigned t o one of two treatment groups, After complete informational counseling and explanation of the posttreatment instructions, subjects were rand omly assigned to receive either Epley's canalith repositioning procedu re or a placebo maneuver, All subjects completed a daily diary for I m onth to document any dizzy spells and their adherence to the posttreat ment instructions. Follow-up Dix-Hallpike testing was performed after I month by an audiologist who was blinded to the patient's treatment g roup status, Analysis of Dix-Hallpike results confirmed that those who received the canalith repositioning procedure had significantly more negative responses (88.9%) than did those in the placebo group (26.7%) .