Index to Chiropractic Literature
Index to Chiropractic Literature
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ID 2368
  Title Plinth padding and measures of posteroanterior lumbar stiffness
Journal J Manipulative Physiol Ther. 1997 Jun;20(5):315-319
Peer Review Yes
Publication Type Article

OBJECTIVE: To investigate whether measurement of posteroanterior (PA) lumbar stiffness is affected by the presence of padding on the testing plinth.

DESIGN: Within a repeated-measures design, measurements were made of lumbar PA stiffness in subjects without low back pain on both a rigid and a padded plinth surface.

SUBJECTS: Nineteen subjects with no history of any low back pain requiring treatment over the preceding 12 months participated in this study.

METHODS: PA stiffness was measured at L3 on two occasions under two different conditions. The first condition involved measurement of lumbar stiffness on a rigid plinth surface; the second involved measurement on a padded plinth surface. A reliable mechanical device was used to obtain the PA stiffness measures.

RESULTS: Mean lumbar PA stiffness values obtained when testing on a padded plinth were 2.86 N/mm less than those values obtained when testing the same lumbar spines on a rigid plinth. A paired t test showed a significant difference between the PA stiffness measures at L3 obtained on the padded plinth and those obtained on the rigid plinth (t = 6.66, df = 18, p < or = .0001).

CONCLUSIONS: These findings suggest that to improve the reliability of lumbar PA stiffness assessment, testing should be performed under the same plinth surface conditions.

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


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