Objective: To evaluate the prognostic factors in benign paroxysmal
positional vertigo (BPPV) treated with canalith repositioning procedures
(CRPs).
Material and methods: Retrospective study of consecutive BPPV cases
diagnosed over three years. All patients underwent a complete
otolaryngologic, audiologic and neurotologic evaluation. The appropriate
CRP was performed, depending on the type of BPPV. Prognostic factors
studied included age, sex, aetiology, duration of disease, abnormal
electronystagmographic findings, canal involvement, improper performance
of manoeuvres, response on first or repeat treatment, and presence of
recurrences.
Results: One hundred and fifty-five patients were studied, 66 men and 89
women, with mean ages of 58.7 and 60.4 years, respectively. Age and the
involvement of two canals or bilateral disease had an effect on initial
treatment outcome and were correlated to increased recurrences but not
to repeat treatment outcome. Secondary BPPV, abnormal
electronystagmographic findings and improper performance of manoeuvres
had a significant effect both on initial and repeat treatment, but not
on recurrences. Sex and duration of symptoms had no effect.
Conclusion: Canalith repositioning procedures provide fast and
long-lasting treatment of BPPV in most patients. However, in a small
subgroup of patients, failures may be noticed that may be attributed to
various prognostic factors