Accuracy validation of a wearable IMU-based gait analysis in healthy female

作者全名:"He, Yi; Chen, Yuxia; Tang, Li; Chen, Jing; Tang, Jing; Yang, Xiaoxuan; Su, Songchuan; Zhao, Chen; Xiao, Nong"

作者地址:"[He, Yi; Tang, Li] Chongqing Med Univ, Dept Rehabil Med, Affiliated Hosp 1, 1 Youyi Rd, Chongqing 400016, Peoples R China; [Chen, Yuxia; Xiao, Nong] Chongqing Med Univ, Natl Clin Res Ctr Child Hlth & Disorders, Dept Rehabil, Minist Educ,Key Lab Child Dev & Disorders,Children, 136 Zhongshan 2nd Rd, Chongqing 400016, Peoples R China; [Zhao, Chen] First Affiliated Hosp Chongqing Med Univ, Dept Orthoped Surg, Dept Hepatobiliary Surg, 1 Youyi Rd, Chongqing 400016, Peoples R China; [Chen, Jing; Tang, Jing; Yang, Xiaoxuan] Shanqi Chongqing Smart Med Technol Co Ltd, Chongqing, Peoples R China; [Su, Songchuan] Chongqing Orthoped Hosp Tradit Chinese Med, Chongqing, Peoples R China"

通信作者:"Xiao, N (通讯作者),Chongqing Med Univ, Natl Clin Res Ctr Child Hlth & Disorders, Dept Rehabil, Minist Educ,Key Lab Child Dev & Disorders,Children, 136 Zhongshan 2nd Rd, Chongqing 400016, Peoples R China.; Zhao, C (通讯作者),First Affiliated Hosp Chongqing Med Univ, Dept Orthoped Surg, Dept Hepatobiliary Surg, 1 Youyi Rd, Chongqing 400016, Peoples R China."

来源:BMC SPORTS SCIENCE MEDICINE AND REHABILITATION

ESI学科分类: 

WOS号:WOS:001135242500001

JCR分区:Q2

影响因子:1.9

年份:2024

卷号:16

期号:1

开始页: 

结束页: 

文献类型:Article

关键词:Gait analysis; Wearable inertial measurement unit; Optical motion capture

摘要:"Objective The aim of this study was to assess the accuracy and test-retest reliability of a wearable inertial measurement unit (IMU) system for gait analysis in healthy female compared to a gold-standard optoelectronic motion capture (OMC) system.Methods In our study, we collected data from 5 healthy young females. Participants were attached with markers from both the OMC system and the IMU system simultaneously. Data was collected when participants walked on a 7 m walking path. Each participant performed 50 repetitions of walking on the path. To ensure the collection of complete gait cycle data, a gait cycle was considered valid only if the participant passed through the center of the walking path at the same time that the OMC system detected a valid marker signal. As a result, 5 gait cycles that met the standards of the OMC system were included in the final analysis. The stride length, cadence, velocity, stance phase and swing phase of the spatio-temporal parameters were included in the analysis. A generalized linear mixture model was used to assess the repeatability of the two systems. The Wilcoxon rank-sum test for continuous variables was used to compare the mean differences between the two systems. For evaluating the reliability of the IMU system, we calculated the Intra-class Correlation Coefficient (ICC). Additionally, Bland-Altman plots were used to compare the levels of agreement between the two systems.Results The measurements of Spatio-temporal parameters, including the stance phase (P = 0.78, 0.13, L-R), swing phase (P = 0.78, 0.13, L-R), velocity (P = 0.14, 0.13, L-R), cadence (P = 0.53, 0.22, L-R), stride length (P = 0.05, 0.19, L-R), by the IMU system and OMC system were similar. Which suggested that IMU and OMC systems could be used interchangeably for gait measurements. The intra-rater reliability showed an excellent correlation for the stance phase, swing phase, velocity and cadence (Intraclass Correlation Coefficient, ICC > 0.9) for both systems. However, the correlation of stride length was poor (ICC = 0.36, P = 0.34, L) to medium (ICC = 0.56, P = 0.22, R). Additionally, the measurements of IMU systems were repeatable.Conclusions The results of IMU system and OMC system shown good repeatability. Wearable IMU system could analyze gait data accurately. In particular, the measurement of stance phase, swing phase, velocity and cadence showed excellent reliability. IMU system provided an alternative measurement to OMC for gait analysis. However, the measurement of stride length by IMU needs further consideration."

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