A pilot study investigating the association between chronic bilateral vestibulopathy and components of a clinical functional assessment tool

Abstract

Background: This study aimed to analyze the association between prospectively assessed falls and functional abilities in patients with bilateral vestibulopathy (BVP).

Methods: Nineteen BVP patients had functional abilities assessed at baseline with the expanded timed get-up-and-go (ETGUG) test. Falls were prospectively recorded with a monthly "fall calendar" over a one-year period. Association between baseline functional abilities and falls was evaluated by Mann-Whitney U testing. Logistic regression was applied to describe the relationship between falls and functional abilities. Area under the receiver-operating characteristic curve (AUC) was used predicting falls based on gait speed.

Results: Eight (45%) of 18 patients (61.11 ± 15.19 years, 12 male) reported 19 falls. Fallers had a significantly faster preferred gait speed (p = 0.03) in the fifth component of the ETGUG. Preferred gait speed was a significant factor in the prediction of falls model (odds ratio = 2.00, p = 0.05, CI = 1.00/4.00 per 10 cm/s). ACU was 0.80 and the cutoff score of 1.35m/s (sensitivity = 75%, specificity = 70%) in predicting falls.

Discussion: BVP patients classified as fallers demonstrated significant faster gait speed after a turning maneuver. Future studies in larger BVP patient samples are needed to refute or confirm our findings.

Keywords: Falls; gait; prospective; validity; vestibular loss.