Incidence of idiopathic benign paroxysmal positional vertigo subtype by hospital visit type: experience of a single tertiary referral centre.

A significantly higher proportion of patients who visited the emergency room had horizontal semicircular canal benign paroxysmal positional vertigo than posterior semicircular canal benign paroxysmal positional vertigo. These results suggest that the true incidence of horizontal semicircular canal benign paroxysmal positional vertigo might be higher than previously reported.