Development of cut-points for determining activity intensity from a wrist-worn ActiGraph accelerometer in free-living adults
Development of cut-points for determining activity intensity from a wrist-worn ActiGraph accelerometer in free-living adults
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DOI：
10.1080/02640414.2020.1794244
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发表时间：
2020-07-19
影响因子：
3.4
通讯作者：
Kaminsky, Leonard A.
中科院分区：
文献类型：
--
作者：
Montoye, Alexander H. K.;Clevenger, Kimberly A.;Kaminsky, Leonard A.
尽管腕戴式加速度计最近流行用于评估自由生活的身体行为，但缺乏用户友好的方法来表征来自腕戴式ActiGraph加速度计的身体活动。本研究的参与者完成了实验室方案和/或3-8小时的直接观察自由生活（活动强度的标准测量），同时在右髋和非优势手腕佩戴ActiGraph GT 9 X Link加速度计。所有实验室数据（n = 36）和11名参与者的自由生活数据用于开发腕戴式加速度计活动强度的矢量幅度计数临界点（计数/分钟），12名参与者的自由生活数据用于交叉验证临界点准确性。临界点为：≥ 3，941计数/min（中度至重度（MVPA））。这些临界点评估自由生活活动强度的准确度为70.8%，而髋关节加速度计的Sasaki/Freedson临界点的准确度为77.1%，腕关节加速度计的Hildebrand Euclidean Norm Minus One（ENMO）临界点的准确度为75.2%。虽然髋关节佩戴的加速度计和ENMO腕关节临界点的准确度较高，但在过去的工作中显示的腕关节加速度计的高磨损顺应性和基于计数的分析方法的易用性可能证明使用这些开发的临界点是合理的，直到可以开发出更准确、同样可用的方法。
Despite recent popularity of wrist-worn accelerometers for assessing free-living physical behaviours, there is a lack of user-friendly methods to characterize physical activity from a wrist-worn ActiGraph accelerometer. Participants in this study completed a laboratory protocol and/or 3-8 hours of directly observed free-living (criterion measure of activity intensity) while wearing ActiGraph GT9X Link accelerometers on the right hip and non-dominant wrist. All laboratory data (n = 36) and 11 participants' free-living data were used to develop vector magnitude count cut-points (counts/min) for activity intensity for the wrist-worn accelerometer, and 12 participants' free-living data were used to cross-validate cut-point accuracy. The cut-points were: = 3,941counts/min (moderate-to-vigorous (MVPA)). These cut-points had an accuracy of 70.8% for assessing free-living activity intensity, whereas Sasaki/Freedson cut-points for the hip accelerometer had an accuracy of 77.1%, and Hildebrand Euclidean Norm Minus One (ENMO) cut-points for the wrist accelerometer had an accuracy of 75.2%. While accuracy was higher for a hip-worn accelerometer and for ENMO wrist cut-points, the high wear compliance of wrist accelerometers shown in past work and the ease of use of count-based analysis methods may justify use of these developed cut-points until more accurate, equally usable methods can be developed.