The relationship of disability (Oswestry) and pain drawings to functional testing.

Unlabelled: There was much enthusiasm about the development of computerized dynamometry in providing large quantities of data to objectively assess muscle performance. However, a much more basic issue arose questioning what these machines actual measure, particularly in pain populations. The purpose of the present study was to determine whether patients' self-reported disability and pain expression, as evaluated with simple questionnaires, were related to isokinetic performance in low back pain patients.

Repeatability of pain drawings in a low back pain population.

Study Design: This is a prospective test-retest repeatability study.

Objective: The primary purpose of this study was to determine the test-retest repeatability, using a variety of scoring methods, of pain drawings in a group of chronic low back pain patients. The intraevaluator repeatability for the methods requiring subjective interpretation was also evaluated.