التفاصيل البيبلوغرافية
العنوان: |
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. |
المؤلفون: |
Koppenhaver SL, Parent EC, Teyhen DS, Hebert JJ, Fritz JM |
المصدر: |
Journal of Orthopaedic & Sports Physical Therapy; Aug2009, Vol. 39 Issue 8, p604-611, 8p |
مستخلص: |
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 singlemeasurement, 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 Epub 24 June 2009. doi:10.2519/jospt.2009.3088. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Orthopaedic & Sports Physical Therapy is the property of JOSPT, Inc. d/b/a Movement Science Media and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
قاعدة البيانات: |
Supplemental Index |