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Neck Index Found Adequate in Test-Retest Reliability

Last Updated: September 25, 2009.

In patients with mechanical neck disorders, the Neck Disability Index demonstrates adequate responsiveness, according to a study published in the October issue of The Spine Journal.

FRIDAY, Sept. 25 (HealthDay News) -- In patients with mechanical neck disorders, the Neck Disability Index demonstrates adequate responsiveness, according to a study published in the October issue of The Spine Journal.

Brian A. Young, P.T., of the Sheppard Air Force Base in Texas, and colleagues studied 91 patients who primarily complained of neck pain, with or without associated upper extremity symptoms, and completed the Neck Disability Index at baseline and at a three-week follow-up.

For the Neck Disability Index, the researchers found that test-retest reliability was moderate (intraclass correlation coefficient, 0.64). They also found that the Neck Disability Index was associated with a minimum clinically important difference of 7.5 points and a minimal detectable change of 10.2 points.

"The Neck Disability Index demonstrates satisfactory responsiveness in our study," the authors conclude. "In application to clinical practice, one should consider Neck Disability Index changes of 10 points to be clinically meaningful for patients with mechanical neck pain presenting both with and without concurrent upper extremity symptoms."

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