Assessment of the kinematic variability among 12 motion analysis laboratories
Assessment of the kinematic variability among 12 motion analysis laboratories
复制标题
DOI：
10.1016/j.gaitpost.2008.10.060
复制
发表时间：
2009-04-01
期刊：
影响因子：
2.4
通讯作者：
Gannotti, Mary E.
中科院分区：
文献类型：
--
作者：
Gorton, George E., III;Hebert, David A.;Gannotti, Mary E.
参与协作研究调查的站点之间运动学测量的变异性是确定多站点研究的受试者数量、可检测差异水平和统计功效的主要因素。在这项研究中，12 个运动分析实验室的 24 名检查员对一名受试者进行了评估，并报告了观察到的 9 个运动参数的变化。在实施标准化步态分析方案后，同一受试者返回 12 个实验室进行另一次评估。此外，系统准确性和受试者在测试日内和测试日之间的变异性也被包括为可能影响站点变异性的因素。检查员之间的标记位置被认为是最大的变异源。实施标准化方案后，变异性降低了 20%。 (C) 2008 Elsevier B.V. 保留所有权利。
Variability of kinematic measurements among sites participating in a collaborative research investigation is a primary factor in determining number of subjects, level of detectable difference and statistical power of a multi-site research study. In this study, one subject was evaluated by 24 examiners at 12 motion analysis laboratories and the observed variability of nine kinematic parameters are reported. Following implementation of a standardized gait analysis protocol the same subject returned for another evaluation at each of the 12 laboratories. Additionally, system accuracy and variability of the subject within and between test days are included as factors that may affect between site variability. Marker placement among examiners is identified as the largest source of variability. A 20% decrease in variability was noted following implementation of the standardized protocol. (C) 2008 Elsevier B.V. All rights reserved.