Theresa A Floegel1,2, Alberto Florez-Pregonero2,3, Eric B Hekler2, Matthew P Buman4. 1. School of Nursing, University of North Carolina-Chapel Hill. 2. School of Nutrition and Health Promotion, Arizona State University, Phoenix. 3. Departamento de Formación, Pontificia Universidad Javeriana, Bogota, Colombia. 4. School of Nutrition and Health Promotion, Arizona State University, Phoenix. matthew.buman@asu.edu.
Abstract
BACKGROUND: The accuracy of step detection in consumer-based wearable activity monitors in older adults with varied ambulatory abilities is not known. METHODS: We assessed the validity of two hip-worn (Fitbit One and Omron HJ-112) and two wrist-worn (Fitbit Flex and Jawbone UP) activity monitors in 99 older adults of varying ambulatory abilities and also included the validity results from the ankle-worn StepWatch as a comparison device. Nonimpaired, impaired (Short Physical Performance Battery Score < 9), cane-using, or walker-using older adults (62 and older) ambulated at a self-selected pace for 100 m wearing all activity monitors simultaneously. The criterion measure was directly observed steps. Intraclass correlation coefficients (ICC), mean percent error and mean absolute percent error, equivalency, and Bland-Altman plots were used to assess accuracy. RESULTS: Nonimpaired adults steps were underestimated by 4.4% for StepWatch (ICC = 0.87), 2.6% for Fitbit One (ICC = 0.80), 4.5% for Omron HJ-112 (ICC = 0.72), 26.9% for Fitbit Flex (ICC = 0.15), and 2.9% for Jawbone UP (ICC = 0.55). Impaired adults steps were underestimated by 3.5% for StepWatch (ICC = 0.91), 1.7% for Fitbit One (ICC = 0.96), 3.2% for Omron HJ-112 (ICC = 0.89), 16.3% for Fitbit Flex (ICC = 0.25), and 8.4% for Jawbone UP (ICC = 0.50). Cane-user and walker-user steps were underestimated by StepWatch by 1.8% (ICC = 0.98) and 1.3% (ICC = 0.99), respectively, where all other monitors underestimated steps by >11.5% (ICCs < 0.05). CONCLUSIONS: StepWatch, Omron HJ-112, Fitbit One, and Jawbone UP appeared accurate at measuring steps in older adults with nonimpaired and impaired ambulation during a self-paced walking test. StepWatch also appeared accurate at measuring steps in cane-users.
BACKGROUND: The accuracy of step detection in consumer-based wearable activity monitors in older adults with varied ambulatory abilities is not known. METHODS: We assessed the validity of two hip-worn (Fitbit One and Omron HJ-112) and two wrist-worn (Fitbit Flex and Jawbone UP) activity monitors in 99 older adults of varying ambulatory abilities and also included the validity results from the ankle-worn StepWatch as a comparison device. Nonimpaired, impaired (Short Physical Performance Battery Score < 9), cane-using, or walker-using older adults (62 and older) ambulated at a self-selected pace for 100 m wearing all activity monitors simultaneously. The criterion measure was directly observed steps. Intraclass correlation coefficients (ICC), mean percent error and mean absolute percent error, equivalency, and Bland-Altman plots were used to assess accuracy. RESULTS: Nonimpaired adults steps were underestimated by 4.4% for StepWatch (ICC = 0.87), 2.6% for Fitbit One (ICC = 0.80), 4.5% for Omron HJ-112 (ICC = 0.72), 26.9% for Fitbit Flex (ICC = 0.15), and 2.9% for Jawbone UP (ICC = 0.55). Impaired adults steps were underestimated by 3.5% for StepWatch (ICC = 0.91), 1.7% for Fitbit One (ICC = 0.96), 3.2% for Omron HJ-112 (ICC = 0.89), 16.3% for Fitbit Flex (ICC = 0.25), and 8.4% for Jawbone UP (ICC = 0.50). Cane-user and walker-user steps were underestimated by StepWatch by 1.8% (ICC = 0.98) and 1.3% (ICC = 0.99), respectively, where all other monitors underestimated steps by >11.5% (ICCs < 0.05). CONCLUSIONS: StepWatch, Omron HJ-112, Fitbit One, and Jawbone UP appeared accurate at measuring steps in older adults with nonimpaired and impaired ambulation during a self-paced walking test. StepWatch also appeared accurate at measuring steps in cane-users.
Authors: Valentin Prieto-Centurion; Richard Casaburi; David B Coultas; Mayank M Kansal; Spyros Kitsiou; Julia J Luo; Jun Ma; Cynthia S Rand; Ai-Yui M Tan; Jerry A Krishnan Journal: Chronic Obstr Pulm Dis Date: 2019-10-23
Authors: William Johnston; Pedro B Judice; Pablo Molina García; Jan M Mühlen; Esben Lykke Skovgaard; Julie Stang; Moritz Schumann; Shulin Cheng; Wilhelm Bloch; Jan Christian Brønd; Ulf Ekelund; Anders Grøntved; Brian Caulfield; Francisco B Ortega; Luis B Sardinha Journal: Br J Sports Med Date: 2020-12-24 Impact factor: 13.800
Authors: Cara L Carty; Carolyn Noonan; Clemma Muller; Astrid Suchy-Dicey; Amanda M Fretts; Steven P Verney; Barbara V Howard; Dedra Buchwald Journal: Neuroepidemiology Date: 2022-02-03 Impact factor: 5.393
Authors: André Henriksen; Martin Haugen Mikalsen; Ashenafi Zebene Woldaregay; Miroslav Muzny; Gunnar Hartvigsen; Laila Arnesdatter Hopstock; Sameline Grimsgaard Journal: J Med Internet Res Date: 2018-03-22 Impact factor: 5.428