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

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