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Inter- and intra-rater reliability of the GAITRite system among individuals with sub-acute stroke

机译：亚急性卒中患者中GAITRite系统的评估者间和评估者内可靠性

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Technology-based assessment tools with semi-automated processing, such as pressure-sensitive mats used for gait assessment, may be considered to be objective; therefore it may be assumed that rater reliability is not a concern. However, user input is often required and rater reliability must be determined. The purpose of this study was to assess the inter- and intra-rater reliability of spatial and temporal characteristics of gait in stroke patients using the GAITRite system. Forty-six individuals with stroke attending in-patient rehabilitation walked across the pressure-sensitive mat 2-4 times at preferred walking speeds, with or without a gait aid. Five raters independently processed gait data. Three raters re-processed the data after a delay of at least one month. The intraclass correlation coefficients (ICC) and 95% confidence intervals of the ICC were determined for velocity, step time, step length, and step width. Inter-rater reliability for velocity, step time, and step length were high (ICC. >. 0.90). Intra-rater reliability was generally greater than inter-rater reliability (from 0.81 to >0.99 for inter-rater versus 0.77 to >0.99 for intra-rater reliability). Overall, this study suggests that GAITRite is a reliable assessment tool; however, there still remains subjectivity in processing the data, resulting in no patients with perfect agreement between raters. Additional logic checking within the processing software or standardization of training could help to reduce potential errors in processing.
机译：具有半自动化处理的基于技术的评估工具（例如用于步态评估的压敏垫）可能被认为是客观的;因此，可以假定评估者的可靠性不是问题。但是，通常需要用户输入，并且必须确定评估者的可靠性。这项研究的目的是使用GAITRite系统评估卒中患者步态时空特征的评估者间和评估者内部可靠性。在有或没有步态助行器的情况下，有46名中风的住院康复患者在优选的步行速度下穿过压敏垫2-4次。五个评估者独立处理步态数据。至少一个月的延迟后，三个评估者对数据进行了重新处理。确定了类内相关系数（ICC）和ICC的95％置信区间，用于速度，步长时间，步长和步长。评估者之间关于速度，步长和步长的可靠性很高（ICC> 0.90）。评估者内部的可靠性通常大于评估者之间的可靠性（评估者内部的可靠性从0.81到> 0.99，评估者内部可靠性从0.77到> 0.99）。总的来说，这项研究表明GAITRite是一种可靠的评估工具。但是，在处理数据时仍然存在主观性，导致没有患者在评估者之间达成完全一致。处理软件中的其他逻辑检查或培训的标准化可以帮助减少处理中的潜在错误。

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