Comparison of posturographic outcomes between two different devices |
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| Affiliation: | 1. Department of Orthopedic and Trauma Surgery, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany;2. Institute of Sport Science, Movement Science Group, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany;3. Institute for Applied Training Science (IAT), Leipzig, Germany;1. Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, NY 11568, United States;2. Department of Psychology, Quinnipiac University, Hamden, CT 06514, United States;3. Wadsworth Center, New York State Department of Health, Albany, NY 12208, United States;4. Department of Biomedical Sciences, School of Public Health, State University of New York at Albany, Albany, NY 12201, United States;1. Tokyo Metropolitan University, Tokyo, Japan;2. Research Center in BNOJPH, Khon Kaen University, Khon Kaen, Thailand;3. Toin University of Yokohama, Kanagawa, Japan;1. Faculty of Health Sciences, Department of Physical Therapy, The Neuromuscular & Human Performance Laboratory, Ariel University, Ariel, Israel;2. Vrije Universiteit, Department of Human Movement Sciences, Amsterdam Movement Sciences, Amsterdam, The Netherlands |
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| Abstract: | The Interactive Balance System (IBS), a posturography device for assessing posture control, is widely used in clinical and rehabilitation settings. However, data on the validity of the device are unavailable. Fluctuations of the center of pressure (COP) were measured in 24 healthy participants (age: 29 ± 5 (mean ± SD) years, 12 females) synchronously using the IBS, which was rigidly mounted on a Kistler platform. Four different bipedal conditions were examined: eyes open or closed on stable or soft surfaces. Time series were compared using congruity (CON, proportion of the measurement time during which values of both devices changed similarly in direction), whereas IBS-specific postural outcomes were correlated with traditional postural control outcomes of the Kistler force platform. The time-displacement curves showed similar shapes for CON (>0.9) for each of the four standing conditions without differences between male and female participants (P > 0.39). The path length results of both devices showed very high linear associations, explaining on average 92% (medio-lateral) or 96% (anterior-posterior) of the common variance. The Kistler path length of the anterior-posterior direction revealed nearly perfect linear associations with the stability index of the IBS (r2 > 0.99). The results of this study indicate that the IBS provides valid posturographic results. Since the medial-lateral and anterior-posterior trajectories of the IBS can be used to calculate COP fluctuations, comparisons between different measurement systems are possible. |
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| Keywords: | Postural control Force plate Upright standing Balance Concurrent validity |
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