加速規應用於功能性前伸測試信效度研究

The Reliability and Validity of the Tri-axial Accelerometer Using in the Functional Reach Test

劉又慈(Yu-Tzu Liu) ； 傅麗蘭(Li-Lan Fu)

《臺灣體育學術研究》 59期 (2015/12) Pp. 131-141

https://doi.org/10.6590/TJSSR.2015.12.07

摘要

目的：透過佩戴在第七頸椎（cervical vertebra 7，簡稱C7）、第三腰椎（lumber vertebra 3，簡稱L3）與外踝上方十公分（10 centimetersabove extramalleolus，簡稱EM）的三軸加速規，量測高齡者功能性前伸測試，以釐清加速規應用上的信度、效度及最佳佩戴位置。方法：本研究徵求健康高齡者共31位，參與功能性前伸測試共兩次，兩次各間隔一天以上，三軸加速規佩戴於C7、L3與EM，並將輸出的總向量換算成標準化的路徑長度（normalized path length，簡稱NLP）、峰峰值（peak-to-peak，簡稱p2p）、平均方根（root mean square，簡稱RMS）、曲線下面積（area under the curve，簡稱AUC），比較四種參數內組相關係數 （intraclass Correlation Coefficient, ICC），以及四參數與功能性前伸測試成績的相關性。結果：三軸加速規在功能性前伸測試的再測信度，以佩戴在L3的ICC在NPL與p2p兩參數數值為佳，其他則皆為優良，並皆達到顯著相關；與校標相關程度則L3佩帶位置有p2p及RMS與AUC有達高度相關（.63－.64），C7佩帶位置有p2p及RMS與AUC有達中度相關（.40－.44），EM佩帶位置有RMS與AUC有達中度相關（.63－.64）而p2p則達低度相關（.27）。結論：高齡者的功能性前伸測試，三軸加速規最佳佩帶位置是L3，建議採用p2p、RMS、AUC的資料，提升平衡能力之評估信效度。

關鍵字

身體重心 ； 加速度紀錄器 ； 高齡者

並列摘要

Purpose: To establish the reliability and validity in the three located tri-axial accelerometer during elderly Functional Reach Test. Methods: Recruited 31 health elderly to join this study. Elderly were asked to performance the Functional Reach Test for two times intervals more than one day. Tri-axial accelerometers were attached at cervical vertebra 7 (C7), lumber vertebra 3 (L3) and 10 centimeters above extramalleolus (EM). The acceleration was calculated form magnitude to normalized path length (NLP), peak-to-peak (p2p), root mean square (RMS) and area under the curve (AUC). The intraclass correlation coefficient (ICC) and 95% confidence intervals were used to determine the ratio of between-test for the Functional Reach Test. The correlation between four parameters and Functional Reach Test distance were calculated by Pearson correlation coefficient. Result: The test-retest reliability in most parameters of the three locations were excellent (ICC ≧ 0.74).The NPL of the L3 and the p2p of the EM were good (0.74 ≧ ICC ≧ 0.60). However, the only the parameters of p2p, RMS and AUC in L3 had moderate correlation with Functional Reach Test scores (.63- .64). Conclusion: L3 is the best location for tri-axial accelerometer during Functional Reach Test. The appropriate parameters during the Functional Reach Test in elderly are p2p, RMS and AUC.

並列關鍵字

Body mass center ； Accelerometer ； Elderly

參考文獻

Li, Y. H.,Song, G. X.,Yu, Y.,Zhou de, D.,Zhang, H. W.(2013).Study on age and education level and their relationship with fall-related injuries in Shanghai, China.Biomed Environ Sci.26(2),79-86.

Wong, W. Y.,Wong, M. S.,Lo, K. H.(2007).Clinical applications of sensors for human posture and movement analysis: a review.Prosthet Orthot Int.31(1),62-75.

Yang, M.,Zheng, H.,Wang, H.,McClean, S.,Newell, D.(2012).iGAIT: an interactive accelerometer based gait analysis system.Comput Methods Programs Biomed.108(2),715-723.

Kobsar, D.,Olson, C.,Paranjape, R.,Hadjistavropoulos, T.,Barden, J. M.(2014).Evaluation of age-related differences in the stride-to-stride fluctuations, regularity and symmetry of gait using a waist-mounted tri-axial accelerometer.Gait Posture.39(1),553-557.

Zijlstra, A.,Zijlstra, W.(2013).Trunk-acceleration based assessment of gait parameters in older persons: a comparison of reliability and validity of four inverted pendulum based estimations.Gait Posture.38(4),940-944.