Department of Biomedical Sciences, University of Padova, Padova, Italy.
Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy.
PLoS One. 2023 Jan 6;18(1):e0280057. doi: 10.1371/journal.pone.0280057. eCollection 2023.
Scientific literature is giving greater importance to dynamic balance in fall prevention. Recently, the validity and reliability of the most employed functional tests for dynamic balance assessment has been investigated. Although these functional tests are practical and require minimal equipment, they are inherently subjective, as most do not use instrumented measurement data in the scoring process. Therefore, this study aimed to assess the validity and reliability of an instrumented unstable board for dynamic balance objective assessment in young adults through double-leg standing trials. A test-retest design was outlined with the unstable board positioned over a force platform to collect objective Center of Pressure (CoP) related and kinematic parameters. Fifteen young adults participated in two evaluation sessions (7-day apart) that comprised ten trials per two dynamic conditions (anterior-posterior and medio-lateral oscillations) aiming to maintain the board parallel to the ground. Pearson's correlation coefficient (r) was employed to assess the validity of the kinematic parameters with those derived from the CoP. The test-retest reliability was investigated through Intraclass Correlation Coefficient (ICC), Standard Error of the measurement, Minimal Detectable Change, and Bland-Altman plots. Statistically significant correlations between the CoP and kinematic parameters were found, with r values ranging from 0.66 to 0.95. Good to excellent intrasession (0.89≤ICCs≤0.95) and intersession (0.66≤ICCs≤0.95) ICCs were found for the kinematics parameters. The Bland-Altman plots showed no significant systematic bias. The kinematics parameters derived from the unstable board resulted valid and reliable. The small size of the board makes it a suitable tool for the on-site dynamic balance assessment and a complement of computerized dynamic posturography.
科学文献越来越重视预防跌倒时的动态平衡。最近，研究人员调查了用于动态平衡评估的最常用功能测试的有效性和可靠性。尽管这些功能测试具有实用性并且所需设备最少，但由于大多数测试在评分过程中并未使用仪器化测量数据，因此它们本质上是主观的。因此，本研究旨在通过双腿站立试验评估仪器化不稳定板对年轻人动态平衡客观评估的有效性和可靠性。采用测试-再测试设计，将不稳定板放置在力台上，以收集客观的压力中心（CoP）相关和运动学参数。15 名年轻人参加了两次评估（相隔 7 天），每次评估包括 10 次双侧动态条件（前后和内外摆动）的试验，以保持板与地面平行。Pearson 相关系数（r）用于评估运动学参数与 CoP 得出的参数的有效性。通过组内相关系数（ICC）、测量标准误差、最小可检测变化和 Bland-Altman 图评估测试-再测试的可靠性。CoP 和运动学参数之间存在显著的相关性，r 值范围为 0.66 至 0.95。运动学参数的组内（0.89≤ICC≤0.95）和组间（0.66≤ICC≤0.95）ICC 均为良好至优秀。Bland-Altman 图显示无显著系统偏差。不稳定板得出的运动学参数是有效且可靠的。板的尺寸小，使其成为现场动态平衡评估的合适工具，也是计算机动态姿势图的补充。
