Effect of ActiGraph GT3X+ position and algorithm choice on step count accuracy in older adults
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| Deutscher übersetzter Titel: | Auswirkung von Positionierung und Algorithmus-Wahl auf die Genauigkeit der Schrittmessung des ActiGraph GT3X+ bei älteren Erwachsenen |
|---|---|
| Autor: | Korpan, Sheila M.; Schafer, Jenessa L.; Wilson, Kaylie C.S.; Webber, Sandra C. |
| Erschienen in: | Journal of aging and physical activity |
| Veröffentlicht: | 23 (2015), 3, S. 377-382, Lit. |
| Format: | Literatur (SPOLIT) |
| Publikationstyp: | Zeitschriftenartikel |
| Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
| Sprache: | Englisch |
| ISSN: | 1063-8652, 1543-267X |
| DOI: | 10.1123/japa.2014-0033 |
| Schlagworte: | |
| Online Zugang: | |
| Erfassungsnummer: | PU201511008232 |
| Quelle: | BISp |
Abstract
Accelerometer step count accuracy may be affected by gait speed, device positioning, and analysis algorithm selection. We assessed ActiGraph GT3X+ step count accuracy related to device placement and analysis algorithm in older adults with walking aids (n = 13) and without walking aids (n = 22). Participants (81.5 ± 5.0 years of age) completed a timed 100-m walk wearing five GT3X+ monitors (hips, ankles, lumbar spine). Individuals with walking aids had slower gait speeds (0.8 ± 0.20 m/s versus 1.2 ± 0.20 m/s without walking aids, p < .001). Intraclass correlation coefficient values for observed versus monitored steps were highest when ankle placement and the low frequency extension (LFE) algorithm were used (left ankle ICC = .989, right ankle ICC = .998). Using the GT3X+ ankle placement and analyzing data with the LFE algorithm resulted in the most accurate step counts in older adults. Verf.-Referat