Evaluation of a new device for measuring responses to posteroanterior forces in a patient population, part 1: Reliability testing

J. Latimer*, M. M. Goodsell, M. Lee, C. G. Maher, B. N. Wilkinson, C. C. Moran

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)

Abstract

Background and Purpose. This study determined the test-retest reliability of measurements of responses to posteroanterior (PA) forces made using a recently developed instrument. Subjects. Twenty-two subjects with non- specific low back pain participated. Methods. The length of the low-stiffness or 'toe' region and the slope of the linear portion of the force-displacement curve were measured on two occasions. Reliability of repeated measurements was evaluated by intraclass correlations coefficients and percentage-of- agreement scores. The presence of a systematic change in the response to PA forces was evaluated by a paired-samples t test. Results. High reliability coefficients were obtained for both indices of the response to PA forces. The t test revealed no systematic change with repeated testing. Conclusion and Discussion. The new device provides highly reliable measurement of the lumbar PA force-displacement relationship and may prove useful in evaluating theories that have suggested a relationship between spinal symptoms and abnormal PA stiffness.

Original languageEnglish
Pages (from-to)158-165
Number of pages8
JournalPhysical Therapy
Volume76
Issue number2
Publication statusPublished - 1996
Externally publishedYes

Keywords

  • Backache
  • movement science
  • Spine
  • Tests and measurements

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