Measurement of abdominal muscle thickness using ultrasound: A reliability study on patients with chronic nonspecific low back pain

Khademi, J. and Bandpei, M.A.M. and Abdollahi, I. and Arabloo, A.M. and Darvishi, H. and Aghamiri, S.S. (2015) Measurement of abdominal muscle thickness using ultrasound: A reliability study on patients with chronic nonspecific low back pain. Journal of Mazandaran University of Medical Sciences, 24 (122). pp. 265-273.

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Abstract

Background and purpose: The purpose of this study was to assess the Within-day and Between-days reliability of abdominal muscles size measurement in patients with chronic non-specific low back pain (LBP) using ultrasound (US). Materials and methods: In this study, 15 patients with chronic non-specific LBP (20-50 years old) were recruited. The reliability of the abdominal muscle size (External and Internal oblique, and Transversus abdominis) was assessed in a relaxed and contraction state by a real time US. Two images were taken on the same day with an hour interval to assess the within day reliability and the third image was taken a week later to determine the between- days reliability. Results: Within-day and between-days reliability of abdominal muscles thickness measurements using US in patients with nonspecific chronic LBP in both rest and contraction state found to be high, ICC = 0.90 for within and ICC=0.85 for between-days of Transversus abdominis muscle in rest state and ICC= 0.82 and 0.86 in contraction state, respectively. For Internal oblique muscle, ICC=0.90 (82) and ICC=0.88 (88) were found for within-day and between-days in rest and contraction state, respectively. Within-day and between-days reliability at rest of ICC=0.86 (79) and in contraction state of ICC=0.79 (75) were demonstrated for External Oblique muscle. Conclusion: Results of the present study suggest US as a reliable method to evaluate the thickness of the abdominal muscles which could be used as a reliable tool in the assessment of patients and also in evaluating the effect of different therapeutic interventions. © 2015, Mazandaran University of Medical Sciences. All rights reserved.

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