Jayne Lesley Anderson1,2, L Samantha Yoward2, Angela J Green1. 1. 1 Physiotherapy Department, Therapies Centre, Hull Royal Infirmary, Hull and East Yorkshire Hospitals NHS Trust, Hull, UK. 2. 2 School of Health Sciences, York St John University, York, UK.
Abstract
OBJECTIVE: To determine the validity of the ActiGraph GT3X accelerometer in step count quantification when compared to observed step count in hospitalised adults recovering from critical illness. SETTING: Large National Health Service (NHS) Hospitals Trust. SUBJECTS: In total, 20 hospital ward-based adults (age: mean 62.3, SD 11.5) who had required greater than 48 hours of mechanical ventilation in the intensive care unit. MAIN MEASURES: Participants walked self-selected distances and speeds as part of a semi-structured movement protocol not exceeding 3 hours. Two ActiGraph GT3X accelerometers were worn, one on the thigh and one on the ankle of the non-dominant leg. Accelerometer-recorded step counts were compared against observed step counts. RESULTS: In total, 31 separate walking episodes were analysed. A mean (SD) of 45.87 (±19.72) steps was calculated for observed step count (range 15-90). Mean differences (95% limits of agreement) of -0.84 steps (-3.88 to 2.2) for the ankle placement and -17.7 steps (-40.63 to 5.25) for the thigh were calculated. Intraclass correlation coefficients (95% confidence intervals) of 0.99 (0.99 to 1.0) and 0.46 (-0.1 to 0.78) were determined for the ankle and thigh, respectively. Placement sites were well tolerated by 95% of participants. CONCLUSION: An ankle-mounted ActiGraph GT3X accelerometer demonstrates validity in quantification of step count in hospitalised adults recovering from critical illness. A thigh placement was not considered valid.
OBJECTIVE: To determine the validity of the ActiGraph GT3X accelerometer in step count quantification when compared to observed step count in hospitalised adults recovering from critical illness. SETTING: Large National Health Service (NHS) Hospitals Trust. SUBJECTS: In total, 20 hospital ward-based adults (age: mean 62.3, SD 11.5) who had required greater than 48 hours of mechanical ventilation in the intensive care unit. MAIN MEASURES: Participants walked self-selected distances and speeds as part of a semi-structured movement protocol not exceeding 3 hours. Two ActiGraph GT3X accelerometers were worn, one on the thigh and one on the ankle of the non-dominant leg. Accelerometer-recorded step counts were compared against observed step counts. RESULTS: In total, 31 separate walking episodes were analysed. A mean (SD) of 45.87 (±19.72) steps was calculated for observed step count (range 15-90). Mean differences (95% limits of agreement) of -0.84 steps (-3.88 to 2.2) for the ankle placement and -17.7 steps (-40.63 to 5.25) for the thigh were calculated. Intraclass correlation coefficients (95% confidence intervals) of 0.99 (0.99 to 1.0) and 0.46 (-0.1 to 0.78) were determined for the ankle and thigh, respectively. Placement sites were well tolerated by 95% of participants. CONCLUSION: An ankle-mounted ActiGraph GT3X accelerometer demonstrates validity in quantification of step count in hospitalised adults recovering from critical illness. A thigh placement was not considered valid.
Authors: Donovan J Lott; Tanja Taivassalo; Claudia R Senesac; Rebecca J Willcocks; Ann M Harrington; Kirsten Zilke; Hilary Cunkle; Catherine Powers; Erika L Finanger; William D Rooney; Gihan I Tennekoon; Krista Vandenborne Journal: Muscle Nerve Date: 2020-11-27 Impact factor: 3.217
Authors: David Thivel; Alice Corteval; Jean-Marie Favreau; Emmanuel Bergeret; Ludovic Samalin; Frédéric Costes; Farouk Toumani; Christian Dualé; Bruno Pereira; Alain Eschalier; Nicole Fearnbach; Martine Duclos; Anne Tournadre Journal: J Med Internet Res Date: 2022-01-14 Impact factor: 5.428