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Characteristic dynamic differences between healthy and low back pain subjects
M Nissan1, K Bar-Ilan, S Brown
1The Orthopaedic B' Department, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
Study Design:
Open retrospective study.
Objectives:
To assess the functional capacity impairment of chronic low back pain (LBP) patients using characteristic dynamic changes.
Setting:
Orthopaedics and Physiotherapy departments at Tel-Aviv, Israel.
Methods:
Thirty-eight normal healthy volunteers and 607 chronic LBP patients were tested on a computerized 3-D lumbar dynamometer. The four major parameters measured were the maximal isometric torque (MIT), maximal velocity against 25% MIT and 50% MIT (MV25, MV50, respectively) and maximal torques in secondary axes (MST). All patients parameters were compared to the normal, healthy findings.
Results:
All four parameters were found to be significantly different between healthy (or non-symptomatic) and symptomatic LBP subjects.
Conclusions:
The findings support the use of 3-D dynamometry and the four parameters mentioned to objectively classify patients with functional disability.