2021
DOI: 10.3390/ijerph18073644
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Reliability of IMU-Derived Static Balance Parameters in Neurological Diseases

Abstract: Static balance is a commonly used health measure in clinical practice. Usually, static balance parameters are assessed via force plates or, more recently, with inertial measurement units (IMUs). Multiple parameters have been developed over the years to compare patient groups and understand changes over time. However, the day-to-day variability of these parameters using IMUs has not yet been tested in a neurogeriatric cohort. The aim of the study was to examine day-to-day variability of static balance parameter… Show more

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Cited by 19 publications
(19 citation statements)
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“…The systematic reliability assessment of the parameters allows to distinguish between values within the MDC range or values representing a real effect of a clinical intervention. In comparison to previously published research highlighting the day-to-variability of balance parameters [ 9 ], the gait parameters extracted in this study indicate higher relative reliability values (ICC) and lower absolute reliability values (MDC%) emphasizing the potential of gait as a tool for reliable clinical assessment on the ward. Hence, our results provide a benchmark when putting gait parameters into perspective and designating a change as clinically relevant.…”
Section: Discussioncontrasting
confidence: 47%
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“…The systematic reliability assessment of the parameters allows to distinguish between values within the MDC range or values representing a real effect of a clinical intervention. In comparison to previously published research highlighting the day-to-variability of balance parameters [ 9 ], the gait parameters extracted in this study indicate higher relative reliability values (ICC) and lower absolute reliability values (MDC%) emphasizing the potential of gait as a tool for reliable clinical assessment on the ward. Hence, our results provide a benchmark when putting gait parameters into perspective and designating a change as clinically relevant.…”
Section: Discussioncontrasting
confidence: 47%
“…Consequently, we encourage the evaluation of parameters that are extracted from other IMU positions such as the feet or even comparing multiple analysis algorithms, to understand how the algorithm choice influences reliability. Day-to-day variabilities in sit-to-stand motions [ 15 ], balance aspects [ 9 ] and ambulation [ 30 ] have been described to occur in patients with neurological/neurodegenerative diseases (especially in PD [ 31 ]). It may thus be that gait changes between two consecutive days due to clinical reasons.…”
Section: Discussionmentioning
confidence: 99%
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“…Since we are basically presenting an intra-individual comparison of static balance across different difficulty levels, we do not assume that the preceding information is relevant to this study. Moreover, number of patients were relatively small and the day-to-day variability in the static sway parameters can be relatively high in neurological patients ( 6 ), therefore the results need to be interpreted with caution especially concerning sensitivity. Vice versa, it is very likely that the detected significances actually represent true differences.…”
Section: Discussionmentioning
confidence: 99%
“…A wearable sensor, worn on the lower back, can provide indirect information on even small movements of the COM. Inertial measurement units (IMUs) have shown to be a valid and reliable tool to quantify static postural sway ( 4 , 5 ), although the extractable variables show markedly different reliabilities ( 6 ). Sway parameters that can be extracted with IMUs are e.g., area, velocity, acceleration and jerk (quick compensatory movements) ( 7 ).…”
Section: Introductionmentioning
confidence: 99%