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ISRN Rehabilitation
Volume 2012 (2012), Article ID 823180, 8 pages
http://dx.doi.org/10.5402/2012/823180
Research Article

Feasibility and Validity of a Wearable GPS Device for Measuring Outings after Stroke

1Discipline of Occupational Therapy, Faculty of Health Sciences, The University of Sydney, Cumberland Campus, P.O. Box 170, Lidcombe, NSW 1825, Australia
2Discipline of Physiotherapy, Faculty of Health Sciences, The University of Sydney, Cumberland Campus, P.O. Box 170, Lidcombe, NSW 1825, Australia
3Department of Health Professions, Faculty of Human Sciences, Macquarie University, 75 Talavera Rd, North Ryde, NSW 2109, Australia

Received 31 July 2012; Accepted 9 September 2012

Academic Editors: R. Schwarzer and M. Syczewska

Copyright © 2012 Annie McCluskey et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Aim. Self-report diaries are a low-cost method of measuring community participation but may be inaccurate, while the “gold standard,” observation is time consuming and costly. This study aimed to investigate the feasibility and validity of a global positioning system (GPS) for measuring outings after stroke. Design. Cross-sectional cohort study. Methods. Twenty ambulant people with stroke wore a GPS device and kept a diary for 7 days, and 18 were observed for half a day. We recorded recruitment rate, user perceptions, and data extraction time. GPS data were analysed against Google maps. Percent exact agreement (PEA) with observation was calculated for GPS and diary. Results. Of 23 eligible participants, 20 consented (mean 3.6 years after stroke). GPS data recovery was high (87%). Some participants had difficulty operating the on/off switch and reading the small screen. Data extraction took an average of 5 hours per participant. PEA with observation was high for number of outings (GPS 94%; diary 89%) but lower for purpose of outings (GPS 71%; diary 82%). Conclusions. The GPS device and diary were both feasible and valid for measuring outings after stroke. Simultaneous use of GPS and diaries is recommended for comprehensive analysis of outings.