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Reliability of Ultrasound Measurement of the Lateral Abdominal and Lumbar Multifidus Muscles in Individuals With Chronic Low Back Pain: A Cross-Sectional Test-Retest Study Publisher Pubmed



Abbasi S1 ; Hadian Rasanani MR2 ; Olyaei GR1 ; Ghotbi N1 ; Rasouli O3
Authors
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Authors Affiliations
  1. 1. Department of Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences, (TUMS), Tehran, Iran
  2. 2. Department of Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences, International Campus (TUMS, IC-TUMS), Brain and Spinal Injury Research Center (BASIR), Tehran, Iran
  3. 3. Department of Public Health and Nursing, Department of Mental Health, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway

Source: Journal of Bodywork and Movement Therapies Published:2021


Abstract

Objectives: Ultrasound (US) imaging has been suggested to evaluate the morphology and function of trunk muscles; however, little is known about the reliability of the US measures in patients with chronic low back pain (CLBP). This study aimed to evaluate intrarater reliability of US imaging of the lateral abdominal and lumbar multifidus muscles in individuals with nonspecific CLBP. Methods: In this cross-sectional study, intrarater within-day and between-day reliability of US measurements of the transversus abdominis, internal oblique, external oblique and lumbar multifidus (at the L3-L4, L4-L5, and L5-S1 levels) muscles were obtained on both sides. The resting and contracted thickness and contraction ratio of each muscle were measured in 21 individuals with nonspecific CLBP. Results: All US measurements of the lateral abdominal and lumbar multifidus muscles demonstrated good to excellent within-day (Intraclass correlation coefficients (ICCs: 0.80–0.98) and between-day (ICCs: 0.80–0.97) reliability. The standard error of the measurement (SEMs) and minimal detectable change (MDCs) of the lateral abdominal muscles on both sides ranged 0.5–1.6 mm and 0.4–4.4 mm, respectively. The SEMs and MDCs of the LM muscles on both sides ranged 1.1–2.7 mm and 2.86–7.49 mm, respectively. Conclusion: The findings indicate that US imaging has good to high intrarater within- and between-day reliability for assessing absolute thickness and contraction ratio of the trunk muscles on both right and left sides in patients with nonspecific CLBP. The vertical alignment of the US transducer is a reliable method for assessing the lateral abdominal muscles. © 2020 Elsevier Ltd
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