Automated Detection of Older Adults’ Naturally-Occurring Compensatory Balance Reactions: Translation From Laboratory to Free-Living Conditions

Nouredanesh, Mina, Ojeda, Lauro, Alexander, Neil B., Godfrey, Alan, Schwenk, Michael, Melek, William and Tung, James (2022) Automated Detection of Older Adults’ Naturally-Occurring Compensatory Balance Reactions: Translation From Laboratory to Free-Living Conditions. IEEE Journal of Translational Engineering in Health and Medicine, 10. p. 2700113. ISSN 2168-2372

Automated_Detection_of_Older_Adults_Naturally-Occurring_Compensatory_Balance_Reactions_Translation_From_Laboratory_to_Free-Living_Conditions.pdf - Published Version
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Objective: Older adults’ falls are a critical public health problem. The majority of free-living fall risk assessment methods have investigated fall predictive power of step-related digital biomarkers extracted from wearable inertial measurement unit (IMU) data. Alternatively, the examination of characteristics and frequency of naturally-occurring compensatory balance reactions (CBRs) may provide valuable information on older adults’ propensity for falls. To address this, models to automatically detect naturally-occurring CBRs are needed. However, compared to steps, CBRs are rare events. Therefore, prolonged collection of criterion standard data (along with IMU data) is required to validate model’s performance in free-living conditions. Methods: By investigating 11 fallers’ and older non-fallers’ free-living criterion standard data, 8 naturally-occurring CBRs, i.e., 7 trips (self-reported using a wrist-mounted voice-recorder) and 1 hit/bump (verified using egocentric vision data) were localized in the corresponding trunk-mounted IMU data. Random forest models were trained on independent/unseen datasets curated from multiple sources, including in-lab data captured using a perturbation treadmill. Subsequently, the models’ translation/generalization to older adults’ out-of-lab data were assessed. Results: A subset of models differentiated between naturally-occurring CBRs and free-living activities with high sensitivity (100%) and specificity (≥99%). Conclusions: The findings suggest that accurate detection of naturally-occurring CBRs is feasible. Clinical/Translational Impact- As a multi-institutional validation study to detect older adults’ naturally-occurring CBRs, suitability for larger-scale free-living studies to investigate falls etiology, and/or assess the effectiveness of perturbation training programs is discussed.

Item Type: Article
Additional Information: Funding information: Mina Nouredanesh received the Vector Institute Postgraduate Affiliate Award (from: Vector Institute, Toronto, Canada), AGE-WELL ACCESS Award, and AGE-WELL Graduate Student Award in Technology and Aging (from: AGE-WELL NCE (Canada’stechnology and aging network), Canada).
Uncontrolled Keywords: Compensatory balance reactions, Data models, Fall risk assessment, Falls, Free-living digital biomarker, Frequency measurement, Machine learning, Older adults, Perturbation methods, Risk management, Standards, Training
Subjects: B900 Others in Subjects allied to Medicine
G900 Others in Mathematical and Computing Sciences
Department: Faculties > Engineering and Environment > Computer and Information Sciences
Depositing User: Rachel Branson
Date Deposited: 16 May 2022 12:37
Last Modified: 05 May 2023 11:45

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