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Real-time ultrasound measures of lumbar erector spinae and multifidus: reliability and comparison to magnetic resonance imaging

Belavý, D.L., Armbrecht, G. and Felsenberg, D. 2015, Real-time ultrasound measures of lumbar erector spinae and multifidus: reliability and comparison to magnetic resonance imaging, Physiological measurement, vol. 36, pp. 2285-2299, doi: 10.1088/0967-3334/36/11/2285.

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Title Real-time ultrasound measures of lumbar erector spinae and multifidus: reliability and comparison to magnetic resonance imaging
Author(s) Belavý, D.L.ORCID iD for Belavý, D.L. orcid.org/0000-0002-9307-832X
Armbrecht, G.
Felsenberg, D.
Journal name Physiological measurement
Volume number 36
Start page 2285
End page 2299
Total pages 15
Publisher IOP Publishing
Place of publication London, Eng.
Publication date 2015-11
ISSN 1361-6579
Summary In this work we examine the reliability and validity (in comparison to magnetic resonance imaging; MRI) of real-time ultrasound measures of lumbar erector spinae thickness. We also consider the between-day reliability of the lumbar multifidus muscle area as measured via ultrasound. 23 male subjects aged 21-45 years were measured three times over the course of nine days by one operator. The first (L1) through to the fifth (L5) lumbar vertebral levels were measured on the left and right sides. MRI was performed on the same day as first ultrasound scanning. For between-day intra-rater reliability, intra-class correlation co-efficients (ICCs), standard error of the measurement, minimal detectable difference and co-efficients of variation (CVs) were calculated along with their 95% confidence intervals and Bland-Altman analysis was performed. On Bland-Altman analysis, erector spinae thickness and multifidus area ultrasound measures 'agreed' with equivalent MR measures, though the correlation between MR and ultrasound measures was typically poor to moderate. For both ultrasound measures, the ICCs ranged from 'moderate' to 'excellent' at individual vertebral levels, although multifidus area (CV ranged from 8 to 15%) was less reliable than erector spinae thickness (CV ranged from 6 to 10%). 'Agreement' on Bland-Altmann analysis was present between days for all ultrasound measures. Averaging between sides and between vertebral levels improved reliability. Average erector spinae thickness showed a CV of 5.5% (ICC 0.77) and average multifidus area 6.2% (ICC 0.80).
Language eng
DOI 10.1088/0967-3334/36/11/2285
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 920299 Health and Support Services not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Institute of Physics and Engineering in Medicine
Persistent URL http://hdl.handle.net/10536/DRO/DU:30079465

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Created: Thu, 12 Nov 2015, 10:07:57 EST

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