Test-retest reliability of psychophysical lift capacity in patients with non-specific chronic low back pain and healthy subjects

Psychophysical lift capacity tests are lifting tests in which the performance, expressed in Newtons, is divided by the perceived exertion, expressed on a Borg scale. The aim of this study was to analyse test-retest reliability of psychophysical lift capacity tests. Patients with non-specific chronic...

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Bibliographic Details
Published in:Acta dermato-venereologica 2007-03, Vol.39 (2), p.133-137
Main Authors: Hodselmans, Audy P, Dijkstra, Pieter U, van der Schans, Cees, Geertzen, Jan H B
Format: Article
Language:English
Subjects:
Adult
Chronic Disease
Female
Humans
Lifting
Low back pain
Low Back Pain - physiopathology
Low Back Pain - psychology
Low Back Pain - rehabilitation
Male
Physical Exertion - physiology
Psychomotor Performance - physiology
Psychophysical measurement
Psychophysics - instrumentation
Reproducibility
Reproducibility of Results
Test-Retest reliability
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Summary:Psychophysical lift capacity tests are lifting tests in which the performance, expressed in Newtons, is divided by the perceived exertion, expressed on a Borg scale. The aim of this study was to analyse test-retest reliability of psychophysical lift capacity tests. Patients with non-specific chronic low back pain (n=20) and healthy subjects (n=20). Psychophysical lift capacity tests were assessed during a back school intake at the Centre for Rehabilitation of the University Medical Centre Groningen. Patients on the waiting list and healthy subjects were assessed twice, with a 2-week interval between assessments. Intra-class correlation (ICC) was calculated as a measure of reliability. An ICC > or = 0.75 was considered as an acceptable reliability. Limits of agreement as a measure for natural variation were calculated. The psychophysical static and dynamic lift capacity tests showed good reliability (ICC > or = 0.75). The limits of agreement are substantial, indicating a considerable natural variation between test-sessions for all psychophysical tests. The psychophysical static lift capacity and dynamic lifting capacity are reliable instruments for patients with non-specific chronic low back pain and healthy subjects. However, a substantial amount of natural variation should be taken into account between 2 test sessions when interpreting the test results clinically.
ISSN:1650-1977
0001-5555
DOI:10.2340/16501977-0014