Abstract
Patients with bilateral vestibular failure (BVF) exhibit imbalance when standing and walking that is linked to a higher fall risk. The purpose of this study was to identify risk factors for falls in BVF. We therefore systematically investigated the interrelationship of clinical and demographic characteristics, gait impairments, and the fall frequency of these patients. Clinical and demographic characteristics as well as quantitative measures of gait performance on a pressure-sensitive gait carpet were collected from 55 patients with different etiologies of BVF. Clinical and demographic data as well as spatiotemporal gait characteristics were used for ANOVA testing and a logistic regression model with categorized fall events as dependent variables. The impairment of peripheral vestibular function, duration of disease, and the overall gait status were not associated with the history of falls in patients with BVF. In contrast, the most predictive factors for falls in BVF were an increase in temporal gait variability, especially at slow walking speeds (p < 0.001; OR = 1.3), and the presence of a concomitant peripheral neuropathy (p < 0.045; OR = 3.6). BVF patients with a high risk of falling exhibit specific gait alterations in a speed-dependent manner. In particular, increased gait fluctuations during slow walking are most predictive for an increased fall risk. The presence of a concomitant peripheral neuropathy further critically impairs postural stability in these patients. Clinical assessment of both these aspects is therefore important to identify those patients at a particularly high fall risk and to initiate preventive procedures early.
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Acknowledgements
The authors thank Judy Benson for copy-editing the manuscript. The work was supported by the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG JA 1087/1-1), the German Hertie Foundation, and the Federal Ministry for Education and Science (BMBF, Nr. 80121000-49) of Germany.
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The study protocol was approved by the local Ethics Committee. It was conducted in accordance to the ethical standards laid down in the declaration of Helsinki and its later amendments.
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Schniepp, R., Schlick, C., Schenkel, F. et al. Clinical and neurophysiological risk factors for falls in patients with bilateral vestibulopathy. J Neurol 264, 277–283 (2017). https://doi.org/10.1007/s00415-016-8342-6
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DOI: https://doi.org/10.1007/s00415-016-8342-6