Low Back Pain: Clinimetric Properties of the Trendelenburg Test, Active Straight Leg Raise Test, and Breathing Pattern During Active Straight Leg Raising
Received 7 September 2006; received in revised form 21 December 2006; accepted 2 January 2007.
Abstract
Objective
Classification of patients with low back pain (LBP) into subgroups is important as considerable variability exists in the LBP population. Clinical applicable, reliable, and valid tests to differentiate patients with LBP are therefore necessary. The purpose of this study is to examine the reliability, internal consistency, and clinical importance of 3 clinical tests that analyze motor control mechanisms of the lumbopelvic region in patients with nonspecific LBP.
Methods
Thirty-six patients with chronic nonspecific LBP volunteered for the study (cross-sectional design). The patients were examined by 2 assessors who were blinded to the results of each other. The following tests were performed: the Trendelenburg test, the active straight leg raise (ASLR) test, and the ASLR with visual inspection of the breathing pattern.
Results
The test-retest reliability coefficients (κ) were greater than 0.75 for the Trendelenburg score and greater than 0.70 for the ASLR. The interobserver reliability coefficients were greater than 0.39 for the assessment of the breathing pattern during the ASLR. The Cronbach α coefficient for internal consistency of the Trendelenburg and ASLR tests was greater than .73. No significant associations were found between the outcome of the tests and self-reported pain severity or disability.
Conclusions
These data provide evidence favoring the test-retest reliability of the Trendelenburg and ASLR tests in patients with LBP. The internal consistency of the outcome of these tests was high for both assessors, suggesting that these tests assess the same dimension. The interobserver reliability of the assessment of the breathing pattern was fair to moderate. Further research regarding the interobserver reliability, clinical importance, validity, and responsiveness of the Trendelenburg test, ASLR test, and breathing pattern during these tests is required.
aTeacher, Division of Musculoskeletal Physiotherapy, Department of Health Sciences, University College Antwerp, Belgium; Research Fellow, Department of Physical Medicine and Rehabilitation, Antwerp University Hospital; Faculty of Medicine, University of Antwerp, Belgium
bAssistant Professor, Division of Musculoskeletal Physiotherapy, Department of Health Sciences, University College Antwerp, Belgium; Assistant Professor, Spinal Research Group, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Belgium
cAssistant Professor, Division of Musculoskeletal Physiotherapy, Department of Health Sciences, University College Antwerp, Belgium
dPhysiotherapist, Assistant Professor, Division of Musculoskeletal Physiotherapy, Department of Health Sciences, University College Antwerp, Belgium
eAssistant Professor, Department of Physical Medicine and Rehabilitation, Antwerp University Hospital; Faculty of Medicine, University of Antwerp, Belgium
Submit requests for reprints to: Nathalie A. Roussel, MT, PT, Campus HIKE-Departement G, Hogeschool Antwerpen, Van Aertselaerstraat 31, 2170 Merksem, Belgium.
ABSTRACT