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KMID : 0615720140310010061
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Jouranl of Korean Acupuncture and Moxibustion society
2014 Volume.31 No. 1 p.61 ~ p.73
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Test-retest Reliability and Intratest Repeatability of Measuring Lumbar Range of Motion Using Inertial Measurement Unit
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Ahn Ji-Hoon
Kim Hyun-Ho
Yoon Woo-Suk
Lee Sun-Ho
Shin You-Bin
Kim Sang-Min
Park Young-Jae
Park Young-Bae
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Abstract
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Objectives : The purpose of this study is to estimate the test-retest reliability and the intratest repeatability in measuring the lumbar range of motion of healthy volunteers with wireless microelectromechanical system inertial measurement unit(MEMS-IMU) system and to discuss the feasibility of this system in the clinical setting to evaluate the lumbar spine movement.
Methods : 19 healthy male volunteers were participated, who got under 21 points at oswestry disability index(ODI) were adopted. Their lumbar motion were measured with IMU twice in consecutive an hour for the test-retest reliability study. Intratest repeatability was calculated in the two tests separately. The calculated intraclass correlation coefficients(ICC) were discussed and compared with the those of the previous studies.
Results : Lumbar range of motion of flexion 41.45°, extension 16.34°, right lateral bending 16.41° left lateral bending 13.63° right rotation ?2.47°, left rotation ?0.61°. ICCs were 0.96∼1.00(intratest repeatability) and 0.61∼0.92(test-retest reliability).
Conclusion : This study shows that MEMS-IMU system demonstrates a high test-retest reliability and intratest repeatability by calculated intraclass correlation coefficients. The results of this study represents that wireless inertial sensor measurement system has portable and economical efficiency. By MEMS-IMU system, we can measures lumbar range of motion and analyze lumbar motion effectively.
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KEYWORD
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LROM, Lumbar range of motion, IMU, Inertial sensor
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