The development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults
The development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults
复制标题
DOI：
10.1186/s12877-020-01649-x
复制
发表时间：
2020-07-22
期刊：
影响因子：
4.1
通讯作者：
Wong, Chek Hooi
中科院分区：
文献类型：
--
作者：
Ho, Soon Hoe;Tan, Dion Piu Sem;Wong, Chek Hooi
使用传感器技术研究老年人在社区中的生活空间流动性和活动参与的兴趣越来越大。来自这些技术的客观数据可以克服自我报告调查的局限性，特别是在患有年龄相关认知障碍的老年人中。本文描述了一种原型混合移动跟踪器的开发和验证，用于评估新加坡33名社区流动老年人的生活空间移动和户外活动。方法将无源全球定位系统记录仪、三轴加速度计和射频识别相结合，研制出一种混合式移动跟踪器。使用地理信息系统（Geographic Information Systems）跟踪数据1周后得出的生活空间的客观度量是离家的最大欧几里得距离（Max Euclid）和所有GPS航路点周围的最小凸多边形面积（MCP区域）。通过直观地确定活动节点的总数，或者参与者从活动轨迹中花费>= 5分钟的地方，来量化户外活动。采用阿拉巴马大学伯明翰分校生活空间评估研究（UAB-LSA）问卷，对4周内的生活空间进行自我报告测量。自我报告的外出活动记录在旅行日记中，持续1周。使用双变量相关来检验生活空间和户外活动的客观和主观测量之间的收敛效度。结果参与者平均年龄为69.2±7.1岁。平均UAB-LSA总分为79.1±17.4分。Max Euclid的中位数（范围）为2.44 km(0.26-7.50) / d， MCP面积的中位数（范围）为3.31 km(2)(0.03-34.23) / d。UAB-LSA总分与Max Euclid有较好的相关性（r = 0.51,p = 0.002），与MCP面积有中度相关性（r = 0.46,p = 0.007）。追踪器测量的活动节点总数中位数（范围）为每周20个（8-47个），与旅行日记记录的总活动次数为每周15个（6-40个）具有良好的相关性（r = 0.52,p = 0.002）。结论为了解家庭外出旅行情况而开发的跟踪系统是可行、可靠的。与UAB-LSA和旅行日志的比较表明，该方法为评估老年人生活空间流动性和活动参与提供了可靠有效的时空数据。
Background There is increasing interest in examining the life space mobility and activity participation of older adults in the community using sensor technology. Objective data from these technologies may overcome the limitations of self-reported surveys especially in older adults with age-associated cognitive impairment. This paper describes the development and validation of a prototype hybrid mobility tracker for assessing life space mobility and out-of-home activities amongst 33 community-ambulant older adults in Singapore. Methods A hybrid mobility tracker was developed by combining a passive Global Positioning System logger, tri-axial accelerometer and radio-frequency identification. Objective measures of life space, derived from 1 week of tracking data using Geographic Information Systems, were the maximum Euclidean distance from home (Max Euclid) and the area of the minimum convex polygon surrounding all GPS waypoints (MCP area). Out-of-home activities were quantified by visually identifying the total number of activity nodes, or places where participants spent >= 5 min, from mobility tracks. Self-reported measure of life space in 4 weeks was obtained using the University of Alabama at Birmingham Study of Life Space Assessment (UAB-LSA) questionnaire. Self-reported out-of-home activities were recorded daily in a travel diary for 1 week. Bivariate correlations were used to examine convergent validity between objective and subjective measures of life space and out-of-home activities. Results The mean age of participants was 69.2 +/- 7.1 years. The mean UAB-LSA total score was 79.1 +/- 17.4. The median (range) Max Euclid was 2.44 km (0.26-7.50) per day, and the median (range) MCP area was 3.31 km(2)(0.03-34.23) per day. The UAB-LSA total score had good correlation with Max Euclid (r = 0.51,p = 0.002), and moderate correlation with MCP area (r = 0.46,p = 0.007). The median (range) total number of activity nodes measured by tracker of 20 (8-47) per week had a good correlation with the total activity count recorded in the travel diaries of 15 (6-40) per week (r = 0.52,p = 0.002). Conclusions The tracking system developed to understand out-of-home travel was feasible and reliable. Comparisons with the UAB-LSA and travel diaries showed that it provided reliable and valid spatiotemporal data to assess the life space mobility and activity participation of older adults.