Thesis - NSU Access Only
Master of Physical Therapy (MPT)
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College of Health Care Sciences - Physical Therapy Department
Publication Date / Copyright Date
Nova Southeastern University
Tom Adams. 1998. Interrater Reliability of McKenzie's Classifications of the Derangement Types Present in Patients with Low Back Pain. Master's thesis. Nova Southeastern University. Retrieved from NSUWorks, College of Health Care Sciences - Physical Therapy Department. (83)
Purpose: To investigate the interrater reliability of the McKenzie method of diagnosing the derangement types found in patients with low back pain. Also to determine whether the credentialed or diplomaed levels of postgraduate training in the McKenzie approach have an improved effect on reliability.
Subjects: A random selective sampling method of 87 McKenzie credentialed or diplomaed clinicians worldwide was used.
Methods: A self generated questionnaire, photographs and a modified McKenzie lumbar spine evaluation form were used to obtain information regarding diagnostic classification of McKenzie's derangement types.
Results: Interclass correlation coefficients (ICC) for both groups' ratings of the two patients was ICC=.952. ICC for the credentialed groups' rating was ICC=.954, and for the diplomaed group ICC=.943. The credentialed group appears to have the highest interrater reliability, however, differences between the two groups are marginal. This suggests that both groups individually and collectively had "almost perfect" interrater reliability.
Conclusions: The McKenzie method of diagnosing low back pain exhibits statistically significant interrater reliability when completed by credentialed or diplomaed clinicians. There was no significant relationship found between the amount of time spent conducting an initial lumbar spine evaluation, number of low back pain patients seen daily, years practicing as a McKenzie therapist and the diagnosis the patients were given.