Classification of low back pain with the use of spectral electromyogram parameters

Spine
J P Peach, S M McGill

Abstract

An electromyogram procedure using spectral parameters to distinguish subjects with low back pain from those without. To add to the growing database on this procedure, to assess the possible overfitting of data in the classification model, to determine whether a model based on a contraction level of 60% of maximum voluntary contraction can produce concordance rates similar to those in models based on 40% and 80% of maximum voluntary contraction, and to develop a classification model to distinguish subjects with low back pain from those without. Other investigators have published a series of models in which spectral parameters measured during fatiguing contractions from the paraspinal muscles have been able to classify a subject into a low back pain or non-low back pain group with a more than 80% concordance rate. Subjects with chronic low back pain (N = 21) and without (N = 18) performed a series of isometric, fatiguing back extensor contractions in which the median power frequency was measured bilaterally from T9, L3, and L5. A Student's t test was used to determine which parameters would be entered into the classification models. Discriminant analysis and logistic regression procedures were used to develop models to classify s...Continue Reading

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Related Concepts

Surface Electromyography
Low Back Pain, Posterior Compartment
Soleus Muscle Structure
Muscle Fatigue

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