Centre for Health, Exercise and Sports Medicine, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Carlton, Victoria 3010, Australia.
Gait Posture. 2010 Mar;31(3):307-10. doi: 10.1016/j.gaitpost.2009.11.012. Epub 2009 Dec 11.
Impaired standing balance has a detrimental effect on a person's functional ability and increases their risk of falling. There is currently no validated system which can precisely quantify center of pressure (COP), an important component of standing balance, while being inexpensive, portable and widely available. The Wii Balance Board (WBB) fits these criteria, and we examined its validity in comparison with the 'gold standard'-a laboratory-grade force platform (FP). Thirty subjects without lower limb pathology performed a combination of single and double leg standing balance tests with eyes open or closed on two separate occasions. Data from the WBB were acquired using a laptop computer. The test-retest reliability for COP path length for each of the testing devices, including a comparison of the WBB and FP data, was examined using intraclass correlation coefficients (ICC), Bland-Altman plots (BAP) and minimum detectable change (MDC). Both devices exhibited good to excellent COP path length test-retest reliability within-device (ICC=0.66-0.94) and between-device (ICC=0.77-0.89) on all testing protocols. Examination of the BAP revealed no relationship between the difference and the mean in any test, however the MDC values for the WBB did exceed those of the FP in three of the four tests. These findings suggest that the WBB is a valid tool for assessing standing balance. Given that the WBB is portable, widely available and a fraction of the cost of a FP, it could provide the average clinician with a standing balance assessment tool suitable for the clinical setting.
站立平衡受损会对人的功能能力产生不利影响，并增加其跌倒的风险。目前还没有一种经过验证的系统可以精确地量化人体重心（COP），而 COP 是站立平衡的一个重要组成部分，同时还具有价格低廉、便携和广泛可用性等特点。Wii 平衡板（WBB）符合这些标准，我们将其与“金标准”-实验室级力平台（FP）进行了比较，以检验其有效性。30 名无下肢病理的受试者在两次不同的测试中，分别睁开或闭上双眼进行单腿和双腿站立平衡测试。WBB 的数据是通过笔记本电脑采集的。使用组内相关系数（ICC）、Bland-Altman 图（BAP）和最小可检测变化（MDC）来检查每个测试设备（包括 WBB 和 FP 数据的比较）的 COP 路径长度的测试-重测可靠性。在所有测试协议中，两种设备的 COP 路径长度在设备内（ICC=0.66-0.94）和设备间（ICC=0.77-0.89）均表现出良好到极好的测试-重测可靠性。BAP 的检查显示，在任何测试中，差异和平均值之间都没有关系，但是在四个测试中的三个测试中，WBB 的 MDC 值确实超过了 FP。这些发现表明，WBB 是评估站立平衡的有效工具。鉴于 WBB 便携、广泛可用且价格仅是 FP 的一小部分，它可以为普通临床医生提供一种适合临床环境的站立平衡评估工具。
