The reliability, validity, and stability of a measure of physical activity in the elderly
The reliability, validity, and stability of a measure of physical activity in the elderly
复制标题
DOI：
10.1016/s0003-9993(96)90258-0
复制
发表时间：
1996-08-01
影响因子：
4.3
通讯作者：
Pieper, C
中科院分区：
文献类型：
--
作者：
Kochersberger, G;McConnell, E;Pieper, C
目的：为了评估的可靠性，有效性和稳定性的加速度计为基础的监测身体活动在老年人population.Design：六项研究进行了评估的Tritrac，一个新的可用的加速度计能够存储在分钟的时代收集的三维活动数据。在最初的台架测试后，腰戴式设备在以1 mph和2 mph的速度坐着和在跑步机上行走时进行了重测信度评估。有效性测试检查了Tritrac区分不同体力活动水平的能力，并将Tritrac与已建立的腕戴式加速度计Actigraph进行了比较。在3至7天的时间内检查测量的稳定性，并且在受试者的子集中进行第二周的测量。（n =40;平均年龄=76），参加家庭非有氧运动计划的参与者（n=36;平均年龄=77）和社区有氧运动项目参与者（n=10;平均年龄=71）。该设备区分了独立分类为久坐、中度活动或活动的受试者（F=49.4，p= 0.0001）和不同强度的特定活动（F=114.5，p = 0.0001）。Tritrac和Actigraph测量比较显示相关性r=.77，p=.0001。平均活动值和久坐活动时间比例的ICC值分别为0.81和0.78，证明了测量的稳定性。没有显着差异时，观察到比较活动测量为两个单独week.Conclusion：Tritrac是一个可靠的和有效的仪器生产活动测量，随着时间的推移，在我们研究的老年人口是稳定的。在我们的纵向测试中，20%的受试者不依从佩戴该器械;在使用Tritrac时必须考虑这种不依从问题。(C)1996年和美国物理医学和康复学院。
Objective: To assess the reliability, validity, and stability of an accelerometer-based monitor of physical activity in an elderly population.Design: Six studies were conducted to assess the Tritrac, a newly available accelerometer capable of storing three-dimensional activity data collected in minute epochs. After initial bench testing, the waist-worn devices were assessed for test-retest reliability during sitting and treadmill walking at 1mph and 2mph. Validity testing examined the Tritrac's ability to discriminate between different levels of physical activity and also compared the Tritrac with an established wrist-worn acclerometer, the Actigraph. Stability of the measure was examined over a period of 3 to 7 days, and in a subset of subjects this measurement was performed for a second week.Setting and Subjects: Residents of a VA Nursing Home (n =40; mean age=76), participants in an in-home nonaerobic exercise program (n=36; mean age=77), and community participants in an aerobic exercise program (n=10; mean age =71).Results: Intraclass correlation coefficients (ICC) for both the bench testing and test-retest reliability were .97. The device discriminated among subjects independently categorized as sedentary, moderately active, or active (F=49.4, p=.0001) and between specific activities of varying intensity (F=114.5, p =.0001). Tritrac and Actigraph measurement comparison showed a correlation of r=.77, p=.0001. Stability of the measure was demonstrated by ICCs=.81 and .78 for mean activity values and proportion of time spent in sedentary activity, respectively. No significant differences were observed when comparing activity measured for two separate weeks.Conclusion: The Tritrac is a reliable and valid instrument producing activity measurement that was stable over time in the elderly population we studied. During our longitudinal testing, 20% of the subjects did not comply with wearing the device; this noncompliance issue must be considered in any use of the Tritrac. (C) 1996 and the American Academy of Physical Medicine and Rehabilitation.