Faculty of Medicine, Universidad Autónoma del Estado de México, Toluca de Lerdo 50180, Mexico.
Faculty of Engineering, Universidad Autónoma del Estado de México, Toluca de Lerdo 50100, Mexico.
Int J Environ Res Public Health. 2022 Sep 3;19(17):11026. doi: 10.3390/ijerph191711026.
This paper analyzes the reliability and usability of a portable electronic instrument that measures balance and balance impairment in older adults. The center of pressure (CoP) metrics are measured with a modified Wii Balance Board (mWBB) platform. In the intra- and inter-rater testing, 16 and 43 volunteers (mean 75.66 and standard deviation (SD) of 7.86 years and 72.61 (SD 7.86) years, respectively) collaborated. Five volunteer raters (5.1 (SD 3.69) years of experience) answered the System Usability Scale (SUS). The most reliable CoP index in the intra-examiner tests was the 95% power frequency in the medial-lateral displacement of the CoP with closed-eyes. It had excellent reliability with an intraclass correlation coefficient ICC = 0.948 (C.I. 0.862-0.982) and a Pearson's correlation coefficient PCC = 0.966 ( < 0.001). The best index for the inter-rater reliability was the centroidal frequency in the anterior-posterior direction closed-eyes, which had an ICC (2,1) = 0.825. The mWBB also obtained a high usability score. These results support the mWBB as a reliable complementary tool for measuring balance in older adults. Additionally, it does not have the limitations of laboratory-grade systems and clinical screening instruments.
本文分析了一种便携式电子仪器的可靠性和可用性，该仪器用于测量老年人的平衡和平衡障碍。中心压力（CoP）指标是通过改良的 Wii 平衡板（mWBB）平台进行测量的。在内部和外部测试中，有 16 名和 43 名志愿者（平均年龄分别为 75.66 岁和 7.86 岁，标准差为 72.61 岁和 7.86 岁）参与了测试。5 名志愿者评估者（5.1 岁，有 3.69 年的经验）回答了系统可用性量表（SUS）。在内部测试中，CoP 闭眼时内侧-外侧位移的 95%功率频率是最可靠的 CoP 指标，其组内相关系数 ICC = 0.948（置信区间为 0.862-0.982）和 Pearson 相关系数 PCC = 0.966（<0.001）均为优秀。对于外部评估者的可靠性，最好的指标是 CoP 闭眼时前-后向的重心频率，其 ICC（2,1）= 0.825。mWBB 还获得了较高的可用性评分。这些结果支持 mWBB 作为一种可靠的、用于测量老年人平衡的补充工具。此外，它没有实验室级系统和临床筛查仪器的局限性。
