Clinical features of recurrence and osteoporotic changes in benign paroxysmal positional vertigo

The incidence of rBPPV in idiopathic BPPV patients was 33.8% in the present study. The mean period of recurrence after a symptom-free interval was about 11.6 months; most patients showed recurrence within 2 years after the first attack of BPPV. Furthermore, about 16% of patients suffered from rBPPV at a different kind or type of canal from the semicircular canal of the initial BPPV attack. Comorbidities, but not age, gender, or the involved semicircular canal, might be correlated with BPPV recurrence. Decreased bone mineral density did not show significant association with BPPV recurrence, but showed a significant relation with BPPV occurrence.