Index to Chiropractic Literature
Index to Chiropractic Literature
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ID 10367
  Title Sensitivity study of H-reflex alterations in idiopathic low back pain patients vs. a healthy population
URL https://www.ncbi.nlm.nih.gov/pubmed/2523948
Journal J Manipulative Physiol Ther. 1989 Apr;12(2):71-78
Author(s)
Subject(s)
Peer Review Yes
Publication Type Article
Abstract/Notes

Twenty-seven male and 12 female healthy volunteers were tested twice with 2-7 days separation. Hoffman (H) reflexes and muscle (M) activation waves were obtained from the posterior tibial nerves bilaterally. Results were compared to those obtained from patients presenting with a complaint of low back and/or leg pain, without compressive neuropathy. M, F, H latencies and H/Mmax ratio were recorded. H/M ratio and latency comparisons were not significantly different in the control group left to right or test to test. For the low back pain group, 10-14 days following the initial evaluation, each subject returned for a follow-up test. During the interim, the patient was followed conservatively using manipulation and home care. Analysis of variance (ANOVA) testing of ratio values demonstrated a difference in overall mean values (p greater than 0.001) for comparisons between the control (mean = 0.367), pretest (mean = 0.695), and posttest (mean = 0.558) values. Sensitivity in discriminating acute low back pain subjects from healthy controls was tested by determining the distance between mean H/M values for the probability curves of each population, with an arbitrary cutoff value of 0.6 as the upper limit normal. Sensitivity distance was 2.29 with a likelihood ratio of 3.04. This suggests that an H/Mmax ratio greater than or equal to 0.6 will correctly identify two of three patients with idiopathic low back pain.

This abstract is reproduced with the permission of the publisher. Article only available in print.


 

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