Clark S, Rose D J, Fujimoto K
Department of Exercise and Sport Science, Oregon State University, Corvallis 97331-6802, USA.
Arch Phys Med Rehabil. 1997 Oct;78(10):1078-84. doi: 10.1016/s0003-9993(97)90131-3.
Reliability of platform posturography tests is essential for the identification and treatment of balance-related disorders. The purposes of this study were to establish the reliability of the limits of stability (LOS) test and to determine the relative variance contributions from identified sources of measurement error.
Generalizability theory was used to calculate (1) variance estimates and percentage of variation for the sources of measurement error, and (2) generalizability coefficients. Random effects repeated measures analysis of variance (RM ANOVA) was used to assess consistency of measurements across both days and targets.
Thirty-eight community-dwelling older adults with no recent history of falls.
Outcome measures derived from the LOS tests included movement velocity (MV), maximum center of gravity (COG) excursion (ME), end point COG excursion (EE), and directional control (DC).
Estimated generalizability coefficients for 2 and 3 days of testing ranged from .69 to .91. Relative contributions of the day facet were minimal. The RM ANOVA results indicated that for three of the movement variables, no significant differences in scores were observed across days.
The 75% and 100% LOS tests are reliable tests of dynamic balance when administered to healthy older adults with no recent history of falls. Dynamic balance measures were generally consistent across multiple evaluations.
平台姿势描记测试的可靠性对于平衡相关障碍的识别和治疗至关重要。本研究的目的是确定稳定极限（LOS）测试的可靠性，并确定已识别测量误差来源的相对方差贡献。
采用概化理论计算（1）测量误差来源的方差估计值和变异百分比，以及（2）概化系数。采用随机效应重复测量方差分析（RM ANOVA）评估两天和不同目标测量的一致性。
38名近期无跌倒史的社区居住老年人。
从LOS测试得出的观察指标包括运动速度（MV）、最大重心（COG）偏移（ME）、终点COG偏移（EE）和方向控制（DC）。
2天和3天测试的估计概化系数范围为0.69至0.91。日期因素的相对贡献最小。RM ANOVA结果表明，对于三个运动变量，不同日期的得分无显著差异。
对于近期无跌倒史的健康老年人，75%和100%的LOS测试是动态平衡的可靠测试。动态平衡测量在多次评估中通常是一致的。
