Abstract
Purpose: Persistent postural-perceptual dizziness (PPPD) is often precipitated by vestibular disorders, and there are cases in which peripheral vestibular dysfunction persists at the time of diagnosis of PPPD. The purpose of this study was to determine whether PPPD cases with canal palsy (CP) on caloric testing were more severe than those without CP.
Methods: Of the patients diagnosed as having PPPD between 2019 and 2021, 75 with preceding vestibular disorder who underwent caloric testing were included in this study. Age, sex, duration, preceding vestibular disorder, and the scores on the DHI (Dizziness Handicap Inventory), HADS (Hospital Anxiety and Depression Scale), NPQ (Niigata PPPD questionnaire), and VSS-sf (Vestibular Symptom Scale-Short Form) were compared between the groups with and without CP.
Results: There was no significant difference in the age, sex, duration, preceding vestibular disorder, DHI score, or HADS score between the two groups. Significantly higher scores in the movement and visual stimulation subscales of the NPQ and the autonomic symptom subscale of the VSS-sf (p<0.05) were observed in the group without CP.
Conclusion: None of the scores was higher in the group with CP. Autonomic symptoms were more frequent, and vestibular symptoms were more likely to be exacerbated by movement or visual stimulation in the group without CP.
