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The reliability of the CODA motion analysis system for lumbar spine analysis: a pilot study


O'Sullivan, Kieran; Clifford, Amanda;

Institution: Irish Association of Chartered Physiotherapists
Subject Keywords: CODA; lumbar spine; posture; range of motion; reliability;
Set: Chronic Conditions
Back pain
Catalogue: Research and Evaluation
Type: Article
Region: Republic of Ireland

Background: low back pain (lBP) is a very common musculoskeletal disorder. Lumbar range of motion (ROM) and
posture are parameters which are commonly assessed in lBP research. Reliable methods of measuring lumbar
spine ROM and posture are needed. The CODA motion analysis system has several potential advantages over
other motion analysis systems; however its reliability for lumbar spine analysis has not been examined. This study
investigated the reliability of the CODA system for measuring lumbar spine sagittal plane ROM and posture.
MethoCls: Twelve partiCipants were tested by two investigators on two occasions. Ten trials of lumbar ROM and
usual sitting pasture were performed. The reliability af upper lumbar, lower lumbar, and pelvic sagi ttal plane
motion was assessed using intra-class correlation coefficients [ICC) and Bland and Altman methods, including
evaluation of the mean diHerence and limits of agreement.
Results: levels of association were very good for ROM, for both intra-rater and inter-rater measurements [all ICC>0.7). However, agreement was mare variable, wi th same lower lumbar and pelvic regions displaying large
mean differences and wide limits of agreement. Overall, greater reliability was obtained for the upper lumbar
region angles, and for intra-rater comparisons.
Conclusion: Reliability of the CODA system varied from very good to fair, depending on the parameters
assessed. While good association was found between masl parameters, the level at agreement was only fair
to moderate. Recommendations are made to improve the protocol used to assess spinal malian, which may
improve reliability.

Suggested citation:

O'Sullivan, Kieran; Clifford, Amanda; . () The reliability of the CODA motion analysis system for lumbar spine analysis: a pilot study [Online]. Available from: [Accessed: 14th August 2018].


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