Validation of a body-worn accelerometer to measure activity patterns in octogenarians

Taylor, Lynne M., Klenk, Jochen, Maney, Alistair J., Kerse, Ngaire, Macdonald, Bruce M. and Maddison, Ralph 2014, Validation of a body-worn accelerometer to measure activity patterns in octogenarians, Archives of physical and medicine rehabilitation, vol. 95, no. 5, pp. 930-934, doi: 10.1016/j.apmr.2014.01.013.

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Title Validation of a body-worn accelerometer to measure activity patterns in octogenarians
Author(s) Taylor, Lynne M.
Klenk, Jochen
Maney, Alistair J.
Kerse, Ngaire
Macdonald, Bruce M.
Maddison, RalphORCID iD for Maddison, Ralph
Journal name Archives of physical and medicine rehabilitation
Volume number 95
Issue number 5
Start page 930
End page 934
Total pages 5
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2014-05
ISSN 1532-821X
Keyword(s) Accelerometry
Geriatric assessment
Physical activity
Activities of Daily Living
Aged, 80 and over
Disability Evaluation
Equipment Design
Monitoring, Ambulatory
Motor Activity
Reproducibility of Results
Summary OBJECTIVE: To determine the validity of a triaxial body-worn accelerometer for detection of gait and postures in people aged >80 years. DESIGN: Participants performed a range of activities (sitting, lying, walking, standing) in both a controlled and a home setting while wearing the accelerometer. Activities in the controlled setting were performed in a scripted sequence. Activities in the home setting were performed in an unscripted manner. Analyzed accelerometer data were compared against video observation as the reference measure. SETTING: Independent-living and long-term-care retirement village. PARTICIPANTS: Older people (N=22; mean age ± SD, 88.1±5y) residing in long-term-care and independent-living retirement facilities. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: The level of agreement between video observation and the accelerometer for the total duration of each activity, and second-by-second correspondence between video observation and the accelerometer for each activity. RESULTS: The median absolute percentage errors between video observation and the accelerometer were <1% for locomotion and lying. The absolute percentage errors were higher for sitting (median, -22.3%; interquartile range [IQR], -62.8% to 10.7%) and standing (median, 24.7%; IQR, -7.3% to 39.6%). A second-by-second analysis between video observation and the accelerometer found an overall agreement of ≥85% for all activities except standing (median, 56.1%; IQR, 34.8%-81.2%). CONCLUSIONS: This single-device accelerometer provides a valid measure of lying and locomotion in people aged >80 years. There is an error of approximately 25% when discriminating sitting from standing postures, which needs to be taken into account when monitoring longer-term habitual activity in this age group.
Language eng
DOI 10.1016/j.apmr.2014.01.013
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
1103 Clinical Sciences
1106 Human Movement And Sports Science
1117 Public Health And Health Services
Socio Economic Objective 920499 Public Health (excl. Specific Population Health) not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, American Congress of Rehabilitation Medicine
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Document type: Journal Article
Collections: Faculty of Health
School of Exercise and Nutrition Sciences
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