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通过智能手机GPS和脚带加速度计测量日常生活行走速度的可比性:横截面研究
Hisashi Kawai1, Keigo Imamura1, Rui Gong1
1Research Team for Human Care, Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 , Sakae-cho, Itabashi-ku, Tokyo, 1730015, Japan, 81 339643241 ext 4243, 81 339641844.
JMIR formative research
|August 18, 2025
概括
智能手机GPS和脚带加速度计在老年人中显示出测量日常生活步行速度的差异. GPS 设备经常高估行走速度,需要进行校正以进行准确的比较.
科学领域:
- 老年学是一门学科.
- 生物医学工程 生物医学工程
- 医疗信息学 医疗信息学
背景情况:
- 日常生活步行速度 (DWS) 是老年人的关键健康指标.
- 智能手机GPS提供可访问的DWS测量,但仅限于户外使用.
- 加速度计可以测量室内DWS,但数据与GPS的可比性尚不清楚.
研究的目的:
- 评估智能手机GPS和脚带加速度计测量的DWS之间的协议和系统错误.
- 为了确定从这两种不同的测量技术中获得的DWS数据的可靠性.
主要方法:
- 在社区居住的老年人中,使用智能手机GPS和脚带加速度计来评估DWS.
- 同时记录被匹配,并使用类内相关系数 (ICC) 和布兰德-阿尔特曼图分析了一致性.
- 99名参与者提供了3652个配对数据点进行分析.
主要成果:
- 与加速度计 (1.12 m/s) 相比,GPS (1.30 m/s) 的平均DWS显著更高.
- 类内相关系数 (ICC) 表示不良的协议 (ICC(2,1) =0.523,ICC(2,k) =0.687).
- 布兰德-阿尔特曼分析显示0.18m/s的固定误差,与广泛的协议边界 (-0.49到0.13m/s).
结论:
- 与脚带加速度计相比,智能手机GPS始终高估了DWS.
- 这两种设备的DWS测量结果之间差异很大.
- 在比较从GPS和加速度计获得的DWS数据时,建议使用校正系数.
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