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dc.creatorMigueles, Jairo H.es_ES
dc.creatorCadenas-Sánchez, Cristinaes_ES
dc.creatorAlcántara, Juan M. A.es_ES
dc.creatorLeal-Martín, Javieres_ES
dc.creatorMañas, Asieres_ES
dc.creatorAra, Ignacioes_ES
dc.creatorGlynn, Nancy W.es_ES
dc.creatorShiroma, Eric J.es_ES
dc.description.abstractAccelerometers' accuracy for sedentary time (ST) and moderate-to-vigorous physical activity (MVPA) classification depends on accelerometer placement, data processing, activities, and sample characteristics. As intensities differ by age, this study sought to determine intensity cut-points at various wear locations people more than 70 years old. Data from 59 older adults were used for calibration and from 21 independent participants for cross-validation purposes. Participants wore accelerometers on their hip and wrists while performing activities and having their energy expenditure measured with portable calorimetry. ST and MVPA were defined as <= 1.5 metabolic equivalents (METs) and >= 3 METs (1 MET = 2.8 mL/kg/min), respectively. Receiver operator characteristic (ROC) analyses showed fair-to-good accuracy (area under the curve [AUC] = 0.62-0.89). ST cut-points were 7 mg (cross-validation: sensitivity = 0.88, specificity = 0.80) and 1 count/5 s (cross-validation: sensitivity = 0.91, specificity = 0.96) for the hip; 18 mg (cross-validation: sensitivity = 0.86, specificity = 0.86) and 102 counts/5 s (cross-validation: sensitivity = 0.91, specificity = 0.92) for the non-dominant wrist; and 22 mg and 175 counts/5 s (not cross-validated) for the dominant wrist. MVPA cut-points were 14 mg (cross-validation: sensitivity = 0.70, specificity = 0.99) and 54 count/5 s (cross-validation: sensitivity = 1.00, specificity = 0.96) for the hip; 60 mg (cross-validation: sensitivity = 0.83, specificity = 0.99) and 182 counts/5 s (cross-validation: sensitivity = 1.00, specificity = 0.89) for the non-dominant wrist; and 64 mg and 268 counts/5 s (not cross-validated) for the dominant wrist. These cut-points can classify ST and MVPA in older adults from hip- and wrist-worn accelerometers.en
dc.description.sponsorshipThis research was funded by the University of Pittsburgh Claude D. Pepper Older Americans Independence Center, Research Registry and Developmental Pilot Grant (no. NIH P30 AG024827) and a National Institute on Aging Professional Services Contract HHSN271201100605P supported AREA/DECOS. Additionally, this study was supported by the Intramural Research Program of the National Institutes of Health, National Institute on Aging, and by research grants AG036594, and AG000181 from the National Institutes of Health. The MOBEMENT study was funded by the Biomedical Research Networking Center on Frailty and Healthy Aging (CIBERFES) and FEDER funds from the European Union (CB16/10/00477). C.C.-S. is supported by the Spanish Ministry of Science and Innovation (FJC2018-037925-I). J.M.A.A. is supported by the Plan Propio de Investigacion 2020 from the University of Granada-Programa Contratos-Puente.en
dc.format.extent14 p.
dc.relation.ispartofSensors, 21 (10), 2021
dc.rights© 2021 by the Authors. Creative Commons Attribution 4.0 Internationalen
dc.subjectSedentary behavioren
dc.subjectLight intensityen
dc.titleCalibration and cross-validation of accelerometer cut-points to classify sedentary time and physical activity from hip and non-dominant and dominant wrists in older adultsen
dc.typeArtículo / Artikuluaes
dc.contributor.departmentInstitute on Innovation and Sustainable Development in Food Chain - ISFOODes_ES
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.type.versionVersión publicada / Argitaratu den bertsioaes

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© 2021 by the Authors. Creative Commons Attribution 4.0 International
Except where otherwise noted, this item's license is described as © 2021 by the Authors. Creative Commons Attribution 4.0 International

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