BACKGROUND: Traditional measurement systems utilized in clinical trials are limited because they are episodic and thus cannot capture the day-to-day fluctuations and longitudinal changes that frequently affect patients across different therapeutic areas. OBJECTIVES: The aim of this study was to collect and evaluate data from multiple devices, including wearable sensors, and compare them to standard lab-based instruments across multiple domains of daily tasks. METHODS: Healthy volunteers aged 18-65 years were recruited for a 1-h study to collect and assess data from wearable sensors. They performed walking tasks on a gait mat while instrumented with a watch, phone, and sensor insoles as well as several speech tasks on multiple recording devices. RESULTS: Step count and temporal gait metrics derived from a single lumbar accelerometer are highly precise; spatial gait metrics are consistently 20% shorter than gait mat measurements. The insole's algorithm only captures about 72% of steps but does have precision in measuring temporal gait metrics. Mobile device voice recordings provide similar results to traditional recorders for average signal pitch and sufficient signal-to-noise ratio for analysis when hand-held. Lossless compression techniques are advised for signal processing. CONCLUSIONS: Gait metrics from a single lumbar accelerometer sensor are in reasonable concordance with standard measurements, with some variation between devices and across individual metrics. Finally, participants in this study were familiar with mobile devices and had high acceptance of potential future continuous wear for clinical trials.
BACKGROUND: Traditional measurement systems utilized in clinical trials are limited because they are episodic and thus cannot capture the day-to-day fluctuations and longitudinal changes that frequently affect patients across different therapeutic areas. OBJECTIVES: The aim of this study was to collect and evaluate data from multiple devices, including wearable sensors, and compare them to standard lab-based instruments across multiple domains of daily tasks. METHODS: Healthy volunteers aged 18-65 years were recruited for a 1-h study to collect and assess data from wearable sensors. They performed walking tasks on a gait mat while instrumented with a watch, phone, and sensor insoles as well as several speech tasks on multiple recording devices. RESULTS: Step count and temporal gait metrics derived from a single lumbar accelerometer are highly precise; spatial gait metrics are consistently 20% shorter than gait mat measurements. The insole's algorithm only captures about 72% of steps but does have precision in measuring temporal gait metrics. Mobile device voice recordings provide similar results to traditional recorders for average signal pitch and sufficient signal-to-noise ratio for analysis when hand-held. Lossless compression techniques are advised for signal processing. CONCLUSIONS: Gait metrics from a single lumbar accelerometer sensor are in reasonable concordance with standard measurements, with some variation between devices and across individual metrics. Finally, participants in this study were familiar with mobile devices and had high acceptance of potential future continuous wear for clinical trials.
Authors: Zahi N Karam; Emily Mower Provost; Satinder Singh; Jennifer Montgomery; Christopher Archer; Gloria Harrington; Melvin G Mcinnis Journal: Proc IEEE Int Conf Acoust Speech Signal Process Date: 2014-07-14
Authors: Benedikt Johannes Braun; Nils Thomas Veith; Rebecca Hell; Stefan Döbele; Michael Roland; Mika Rollmann; Jörg Holstein; Tim Pohlemann Journal: J Foot Ankle Res Date: 2015-09-22 Impact factor: 2.303
Authors: Dustin A Heldman; Denzil A Harris; Timothy Felong; Kelly L Andrzejewski; E Ray Dorsey; Joseph P Giuffrida; Barry Goldberg; Michelle A Burack Journal: Digit Biomark Date: 2017-05-12
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