The development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults

Abstract 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-...

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Main Authors: Soon Hoe Ho, Dion Piu Sern Tan, Pey June Tan, Ka Wei Ng, Zoe Zon Be Lim, Isabel Hui Leng Ng, Lok Hang Wong, Mimaika Luluina Ginting, Belinda Yuen, Ullal Jagadish Mallya, Mei Sian Chong, Chek Hooi Wong
Format: Article
Language:English
Published: BMC 2020-07-01
Series:BMC Geriatrics
Subjects:
Online Access:http://link.springer.com/article/10.1186/s12877-020-01649-x
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spelling doaj-c0aed791f10e4a1883a7d868f1c4d7212020-11-25T03:51:28ZengBMCBMC Geriatrics1471-23182020-07-0120111210.1186/s12877-020-01649-xThe development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adultsSoon Hoe Ho0Dion Piu Sern Tan1Pey June Tan2Ka Wei Ng3Zoe Zon Be Lim4Isabel Hui Leng Ng5Lok Hang Wong6Mimaika Luluina Ginting7Belinda Yuen8Ullal Jagadish Mallya9Mei Sian Chong10Chek Hooi Wong11Geriatric Education and Research Institute LtdNDR Medical Technology Pte LtdGeriatric Education and Research Institute LtdNDR Medical Technology Pte LtdGeriatric Education and Research Institute LtdGeriatric Education and Research Institute LtdGeriatric Education and Research Institute LtdGeriatric Education and Research Institute LtdLee Kuan Yew Centre for Innovative Cities, Singapore University of Technology and DesignDepartment of Geriatric Medicine, Khoo Teck Puat HospitalGeriatric Education and Research Institute LtdGeriatric Education and Research Institute LtdAbstract 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 km2 (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.http://link.springer.com/article/10.1186/s12877-020-01649-xMobility trackerGlobal positioning systemRadio-frequency identificationAccelerometerLife space
collection DOAJ
language English
format Article
sources DOAJ
author Soon Hoe Ho
Dion Piu Sern Tan
Pey June Tan
Ka Wei Ng
Zoe Zon Be Lim
Isabel Hui Leng Ng
Lok Hang Wong
Mimaika Luluina Ginting
Belinda Yuen
Ullal Jagadish Mallya
Mei Sian Chong
Chek Hooi Wong
spellingShingle Soon Hoe Ho
Dion Piu Sern Tan
Pey June Tan
Ka Wei Ng
Zoe Zon Be Lim
Isabel Hui Leng Ng
Lok Hang Wong
Mimaika Luluina Ginting
Belinda Yuen
Ullal Jagadish Mallya
Mei Sian Chong
Chek Hooi Wong
The development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults
BMC Geriatrics
Mobility tracker
Global positioning system
Radio-frequency identification
Accelerometer
Life space
author_facet Soon Hoe Ho
Dion Piu Sern Tan
Pey June Tan
Ka Wei Ng
Zoe Zon Be Lim
Isabel Hui Leng Ng
Lok Hang Wong
Mimaika Luluina Ginting
Belinda Yuen
Ullal Jagadish Mallya
Mei Sian Chong
Chek Hooi Wong
author_sort Soon Hoe Ho
title The development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults
title_short The development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults
title_full The development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults
title_fullStr The development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults
title_full_unstemmed The development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults
title_sort development and validation of a prototype mobility tracker for assessing the life space mobility and activity participation of older adults
publisher BMC
series BMC Geriatrics
issn 1471-2318
publishDate 2020-07-01
description Abstract 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 km2 (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.
topic Mobility tracker
Global positioning system
Radio-frequency identification
Accelerometer
Life space
url http://link.springer.com/article/10.1186/s12877-020-01649-x
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