McGough Ellen L, Hsu Lin-Ya, Thompson Hilaire, Teri Linda
Department of Rehabilitation Medicine, University of Washington.
School of Nursing, University of Washington.
Phys Occup Ther Geriatr. 2018;36(4):399-410. doi: 10.1080/02703181.2018.1556231. Epub 2019 Jan 14.
To examine concurrent validity of inertial sensor (APDM ISway) versus force plate center of pressure (COP) measures of postural sway in cognitively impaired older adults.
Participants, mean age 85.6 (SD 4.8), were tested in 4 static standing conditions: (1) eyes open/normal base, (2) eyes open/narrow base, (3) eyes closed/normal base, and (4) eyes closed/narrow base. ISway and COP measures were collected.
Strong correlations between ISway trunk sway smoothness [ISway JERK, and COP path length (r = 0.67-0.85) and COP mean velocity (r = 0.77-0.87); also ISway total sway acceleration path length/trail duration [ISway PATH, (m/s)] and COP path length (r = 0.77-0.87) and COP mean velocity (r = 0.77-0.91). Increased sway was detected in narrow versus normal base and eyes closed versus open conditions ( = .001).
APDM ISway demonstrated concurrent validity to force-plate COP and changes in postural sway were detected between conditions.
研究惯性传感器（APDM ISway）与认知障碍老年人姿势摆动的测力平台压力中心（COP）测量方法的同时效度。
平均年龄85.6岁（标准差4.8）的参与者在4种静态站立条件下接受测试：（1）睁眼/正常支撑面，（2）睁眼/窄支撑面，（3）闭眼/正常支撑面，以及（4）闭眼/窄支撑面。收集ISway和COP测量数据。
ISway躯干摆动平滑度[ISway JERK]与COP路径长度（r = 0.67 - 0.85）和COP平均速度（r = 0.77 - 0.87）之间存在强相关性；ISway总摆动加速度路径长度/轨迹持续时间[ISway PATH，（米/秒）]与COP路径长度（r = 0.77 - 0.87）和COP平均速度（r = 0.77 - 0.91）之间也存在强相关性。在窄支撑面与正常支撑面以及闭眼与睁眼条件下检测到摆动增加（P = .001）。
APDM ISway对测力平台COP具有同时效度，并且在不同条件下检测到姿势摆动的变化。
