K Taraldsen
Quantification of outdoor mobility by use of accelerometer-measured physical behaviour
Taraldsen, K; Granat, MH; Helbostad, JL
Abstract
Hip fractures in older persons are associated with both low levels of daily physical activity and loss of outdoor mobility. The aim of this study was to investigate if accelerometer-based measures of physical behaviour can be used to determine if people undertake outdoor walking and to provide reference values for physical behaviour outcomes related to outdoor mobility in this population. Older persons (n=245) aged ≥70 years one year after hip fracture participated. Six objective outcome measures of physical behaviour collected by a thigh-mounted activity monitor were compared with self-reported outdoor mobility assessed with the Nottingham Extended ADL scale. All measures of time and length in upright (standing and walking) were significantly lower in participants who reported not to walk outdoors (p<0.001). A set of cut-off points for the different physical behaviour variables was generated. Maximum length of upright events discriminated best between groups, with 31 minutes as a threshold to determine if a person is more likely to report that they walk outdoors (sensitivity: 0.805, specificity: 0.704, AUC: 0.871), or 41 minutes or more to determine if a person is more likely to report outdoor walk on their own (sensitivity: 0.802, specificity: 0.833, AUC: 0.891). Physical behaviour variables from activity monitoring can provide information about patterns of physical behaviour related to outdoor activity performance.
Citation
Taraldsen, K., Granat, M., & Helbostad, J. (2015). Quantification of outdoor mobility by use of accelerometer-measured physical behaviour. BioMed Research International, 2015, Article ID 910259. https://doi.org/10.1155/2015/910259
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 16, 2015 |
Publication Date | Jan 1, 2015 |
Deposit Date | Dec 1, 2015 |
Publicly Available Date | Apr 5, 2016 |
Journal | BioMed Research International |
Print ISSN | 2314-6133 |
Electronic ISSN | 2314-6141 |
Publisher | Hindawi |
Volume | 2015 |
Pages | Article ID 910259 |
DOI | https://doi.org/10.1155/2015/910259 |
Publisher URL | http://dx.doi.org/10.1155/2015/910259 |
Related Public URLs | http://www.hindawi.com/journals/bmri/ |
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2015 Taraldsen et al Quantification of Outdoor Mobility by Use of Accelerometer-Measured Physical Behaviour Biomed Research Int.pdf
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Licence
http://creativecommons.org/licenses/by/3.0/
Publisher Licence URL
http://creativecommons.org/licenses/by/3.0/
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