The Effect of Averaging Multiple Trials on Measurement Error During Ultrasound Imaging of Transversus Abdominis and Lumbar Multifidus Muscles in Individuals With Low Back Pain

被引:97
作者
Koppenhaver, Shane L. [1 ]
Parent, Eric C. [2 ,3 ]
Teyhen, Deydre S. [4 ]
Hebert, Jeffrey J. [1 ,5 ]
Fritz, Julie M. [1 ,6 ]
机构
[1] Univ Utah, Coll Hlth, Salt Lake City, UT USA
[2] Univ Alberta, Dept Phys Therapy, Edmonton, AB, Canada
[3] Glenrose Rehabil Hosp, Edmonton, AB, Canada
[4] Baylor Univ, USA, Doctoral Program Phys Therapy, San Antonio, TX USA
[5] Univ Utah, Dept Neurosurg, Salt Lake City, UT USA
[6] Intermt Hlth Care, Salt Lake City, UT USA
关键词
abdominal muscles; lumbar spine; reliability; ultrasonography; DISC HERNIATION; DRAWING-IN; RELIABILITY; CONTRACTION; RECRUITMENT; INTRARATER; MOVEMENT; VALIDITY; PEOPLE; INDEX;
D O I
10.2519/jospt.2009.3088
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
STUDY DESIGN: Clinical measurement, reliability study. OBJECTIVES: To investigate the improvements in precision when averaging multiple measurements of percent change in muscle thickness of the transversus abdominis (TrA) and lumbar multifidus (LM) muscles. BACKGROUND: Although the reliability of TrA and LM muscle thickness measurements using rehabilitative ultrasound imaging (RUSI) is good, measurement error is often large relative to mean muscle thickness. Additionally, percent thickness change measures incorporate measurement error from both resting and contracted conditions. METHODS: Thirty volunteers with nonspecific low back pain participated. Thickness measurements of the TrA and LM muscles were obtained using RUSI at rest and during standardized tasks. Percent thickness change was calculated with the formula (thickness(contracted)-thickness(rest)/thickness(rest)). Standard error of measurement (SEM) quantified precision when using 1 or a mean of 2 to 6 consecutive measurements. RESULTS: Compared to when using a single measurement, SEM of both the TrA and LM decreased by nearly 25% when using a mean of 2 measures, and by 50% when using the mean of 3 measures. Little precision was gained by averaging more than 3 measurements. CONCLUSION: When using RUSI to determine percent change in TrA and LM muscle thickness, intraexaminer measurement precision appears to be optimized by using an average of 3 consecutive measurements. J Orthop Sport Phys Ther 2009;39(8):604-611. doi:10.2519/jospt.2009.3088
引用
收藏
页码:604 / 611
页数:8
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