A new measurement method for spine reposition sense

Petersen, Cheryl M.; Zimmermann, Chris L.; Cope, Steven; Bulow, Mary Ellen; Ewers-Panveno, Erinn
January 2008
Journal of NeuroEngineering & Rehabilitation (JNER);2008, Vol. 5, Special section p1
Academic Journal
Background: A cost effective tool for the measurement of trunk reposition sense is needed clinically. This study evaluates the reliability and validity of a new clinical spine reposition sense device. Methods: The first part of this three part investigation included 45 asymptomatic subjects examined in the first 20 repeated trials portion assessing spine reposition sense. The second portion, test-retest, examined 57 asymptomatic subjects. Initial testing consisted of subjects sitting on the device and performing 20 trials of a self-determined 2/3 trunk flexion position. The second portion of the study involved 7 trials of trunk flexion performed twice. The angular position for each trial was calculated and the mean reposition error from the initial 2/3 position was determined. For the third portion, the new device was compared to the Skill Technologies 6D (ST6D) Imperial Motion Capture and Analysis System. Results: ICC (3,1) for trials 4-7 was 0.79 and 0.76 for time one and time two, respectively and the test-retest ICC (3,k) was 0.38. Due to the poor test-retest ICC, the Bland Altman method was used to compare test and retest absolute errors. Most measurement differences were small and fell within the 95% confidence interval. Comparable measures between the two methods were found using the Bland Altman method to compare the reposition sense device to the ST6D system. Conclusion: The device may be a cost effective clinical technique for sagittal trunk reposition sense measurement.


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