Test-Retest Reliability of an Automated Infrared-Assisted Trunk Accelerometer-Based Gait Analysis System

Abstract

The aim of this study was to determine the test-retest reliability of an automated infrared-assisted, trunk accelerometer-based gait analysis system for measuring gait parameters of healthy subjects in a hospital. Thirty-five participants (28 of them females; age range, 23–79 years) performed a 5-m walk twice using an accelerometer-based gait analysis system with infrared assist. Measurements of spatiotemporal gait parameters (walking speed, step length, and cadence) and trunk control (gait symmetry, gait regularity, acceleration root mean square (RMS), and acceleration root mean square ratio (RMSR)) were recorded in two separate walking tests conducted 1 week apart. Relative and absolute test-retest reliability was determined by calculating the intra-class correlation coefficient (ICC3,1) and smallest detectable difference (SDD), respectively. The test-retest reliability was excellent for walking speed (ICC = 0.87, 95% confidence interval = 0.74–0.93, SDD = 13.4%), step length (ICC = 0.81, 95% confidence interval = 0.63–0.91, SDD = 12.2%), cadence (ICC = 0.81, 95% confidence interval = 0.63–0.91, SDD = 10.8%), and trunk control (step and stride regularity in anterior-posterior direction, acceleration RMS and acceleration RMSR in medial-lateral direction, and acceleration RMS and stride regularity in vertical direction). An automated infrared-assisted, trunk accelerometer-based gait analysis system is a reliable tool for measuring gait parameters in the hospital environment.

Data Quality and Reliability Assessment of Wearable EMG and IMU Sensor for Construction Activity Recognition

“…Moreover, the ICC form (3, k) considers both systematic and random errors and uses the mean value of the repeated measurements as evaluation scores [ 31 ]. Based on the ICC score, the strength of relative reliability can be interpreted as excellent (if ICC score is higher than 0.75), good (if ICC score is between 0.59 and 0.75), fair (if ICC score is between 0.48 and 0.58), and poor (if ICC score is less than 0.40) [ 31 , 32 , 54 , 55 , 56 , 57 ].…”

“…SEM estimates how the repeated measures of an individual on the same device tend to distribute around true value [ 31 ]. SEM is estimated as defined in Equation (5), where SD is the standard deviation of the measurements of a test and retest of all participants, and ICC is the average trial-to-trial or day-to-day test-retest relative reliability [ 31 , 32 , 56 , 58 , 59 ]. The SEM% was used to compare the absolute test-retest reliabilities of different scenarios, which was evaluated using Equation (6), where the SEM score is represented as a percentage of SEM divided by the mean of test and retest measurements.…”

The Coefficient of Variation of Step Time Can Overestimate Gait Abnormality: Test-Retest Reliability of Gait-Related Parameters Obtained with a Tri-Axial Accelerometer in Healthy Subjects

“…Only one operator performed the measurements for gait assessment; therefore, interrater reliability remains unclear. In future studies, a comparison of the tri-axial accelerometer as used in the present study with an accelerometer based on an infrared system (as proposed in a previous study [31]) tell us the difference in the accuracy between manual and automatic procedures.…”

“…Portable devices for quantitative gait analysis have been developed, and these devices have the advantage in clinical scenarios of needing only a walkway, rather than any large space or facility [18,19,[21][22][23][29][30][31]. In the present study, we validated the reproducibility of a tri-axial accelerometer used in gait assessment by performing test-retest measurements within a 3-month period 1 month after the first evaluation.…”

Usos De Los Acelerómetros en Fisioterapia: Una Revisión De La Literatura

“…Se puede hacer uso de los acelerómetros para analizar las afecciones espaciotemporales de la marcha en pacientes con osteoartritis de rodilla, enfermedad de Parkinson, adultos mayores. Adicionalmente, con esta medición se pueden detectar asimetrías en cuanto a la velocidad, acho de paso, cadencia y control de tronco que se relacionen con riesgo de caída y alteración del balance en posición estática y dinámica (5,11,12,(42)(43)(44)(45)(46)(47)(48)(49)(50). De hecho, la evaluación a través de acelerometría puede detectar alteraciones en la marcha como perturbaciones, temblores, pasos cortos en pacientes con enfermedad de Parkinson y ser una evaluación objetiva para dirigir tratamientos enfocados en la rehabilitación de estos factores y tener un seguimiento cuantitativo de los resultados del paciente debido a que los acelerómetros permiten evaluar en planos frontal, sagital, transversal detectando alteraciones antero posteriores y laterales (51-57).…”