Neuroscience Research Australia, Randwick, NSW, 2031, Australia.
BMC Geriatr. 2011 Oct 20;11:63. doi: 10.1186/1471-2318-11-63.
This study aimed to examine: 1) Swaymeter concurrent validity in discriminating between young and older adult populations; 2) Swaymeter convergent validity against a forceplate system; and 3) the immediate test-retest repeatability of postural sway measures obtained from the Swaymeter.
Twenty-nine older adults aged 71 to 83 years and 11 young adults aged 22 to 47 years had postural sway measured simultaneously with the Swaymeter and a forceplate for three repeat 30 second trials, under four conditions (floor eyes open, floor eyes closed, foam eyes open, foam eyes closed).
Age-related differences in sway parameters across the four conditions were evident using the Swaymeter. Moderate-to-good correlations were found between Swaymeter and forceplate sway measures across conditions (r = 0.560-0.865). Good agreement between the Swaymeter and forceplate were found for anteroposterior and mediolateral sway displacement measures (average offset = 6 mm). Sway path length measures were longer for the forceplate compared to the Swaymeter (average offset = 376 mm), but these data showed good agreement following log-transformation. The Swaymeter was reliable across trials, with intraclass correlation coefficients ranging from 0.654 to 0.944.
The Swaymeter is a reliable tool for assessing postural sway and discriminates between performance of young and older people across multiple sensory conditions.
本研究旨在检验：1）Swaymeter 在区分年轻和老年人群方面的同时效度；2）Swaymeter 与力台系统的收敛效度；3）Swaymeter 获得的姿势摆动测量值的即时重测可重复性。
29 名年龄在 71 至 83 岁的老年人和 11 名年龄在 22 至 47 岁的年轻人同时使用 Swaymeter 和力台进行了三次 30 秒重复试验，共四个条件（地面睁眼、地面闭眼、泡沫睁眼、泡沫闭眼）。
Swaymeter 显示，四个条件下的摆动参数存在与年龄相关的差异。Swaymeter 和力台的摆动测量值在各条件下均存在中度至高度相关（r = 0.560-0.865）。Swaymeter 和力台在前后和左右摆动位移测量值上具有良好的一致性（平均偏移量= 6 毫米）。与 Swaymeter 相比，力台的摆动路径长度测量值更长（平均偏移量= 376 毫米），但这些数据在对数转换后具有良好的一致性。Swaymeter 在试验之间具有可靠性，组内相关系数范围为 0.654 至 0.944。
Swaymeter 是一种可靠的工具，可用于评估姿势摆动，并在多个感觉条件下区分年轻人和老年人的表现。
