# Discriminative validity and diagnostic accuracy of Horus® posturographic parameters in individuals with and without vestibulopathy

## TL;DR

The study shows that Horus® posturographic parameters can effectively distinguish individuals with and without vestibular dysfunction, aiding in diagnosis and rehabilitation.

## Contribution

The study introduces the discriminative validity and diagnostic accuracy of specific Horus® posturographic parameters for vestibular dysfunction.

## Key findings

- CE/SL and MV/ML in C4 are effective for ruling out vestibular dysfunction.
- Vestibular Function and CBI show high sensitivity in diagnosing vestibular disorders.
- Posturographic parameters showed moderate-to-good discriminative validity.

## Abstract

•CE/SL and MV/ML in C4 are effective for ruling out vestibular dysfunction.•Vestibular Function and CBI show high sensitivity in vestibular disorder diagnosis.•Moderate to large differences were observed for Visual Function, Vestibular, and CBI.•Horus® parameters enhance vestibular dysfunction diagnosis and rehabilitation.•Posturographic parameters showed moderate-to-good discriminative validity.

CE/SL and MV/ML in C4 are effective for ruling out vestibular dysfunction.

Vestibular Function and CBI show high sensitivity in vestibular disorder diagnosis.

Moderate to large differences were observed for Visual Function, Vestibular, and CBI.

Horus® parameters enhance vestibular dysfunction diagnosis and rehabilitation.

Posturographic parameters showed moderate-to-good discriminative validity.

To assess the discriminative validity and diagnostic accuracy of posturographic parameters from the Horus® in individuals with and without vestibulopathy.

This is a methodological study of discriminative validity and diagnostic accuracy. 153 individuals aged 40–79, of both sexes, were included and divided into Group 1 (with vestibular dysfunction) and Group 2 (without vestibular dysfunction). Instruments on clinical characterization, cognition, physical activity level, and posturography were applied. Discriminative validity was assessed with nonparametric multivariate analyses, the Mann-Whitney test, controlled with Holm adjustment and rank-biserial correlation to estimate effect size. Sensitivity, specificity, area under the curve, and cutoff points were calculated using ROC curves.

The final sample included 78 individuals in Group 1 and 75 in Group 2, with mean ages of 59.36 and 56.48 years, respectively. Significant differences were found between the groups for all dependent variables related to confidence ellipse/limit of stability and mediolateral velocity (p < 0.001), with moderate to large differences (ES > 0.28) and in most of the anteroposterior velocity and sensory analysis (p < 0.005), with small to moderate differences (ES: >0.11 and <0.43). The ROC curve analysis revealed that confidence ellipse/limit of stability and mediolateral velocity exhibited high specificity (84% and 80%) and moderate sensitivity (52.6% and 53.85%). The Vestibular Function parameter demonstrated good sensitivity (70%) and moderate specificity (60.8%), while the Composite Balance Index showed a sensitivity of 79.5% and specificity of 64%.

Horus® posturographic parameters demonstrated moderate to good discriminative ability to differentiate individuals with and without vestibular dysfunction, with high sensitivity for vestibular function and the Composite Balance Index.

3 (cross-sectional study).