1. Supplemental PowerPoint Slides
Measurement properties of the Norwegian version of the Neck Disability Index in chronic neck pain
Jan Børre Johansena, Nada Andelica,b, Eva Bakkec, Erik Bautz Holtera,b, Anne Marit Mengshoelc, Cecilie Røea,b.
aDepartment of Physical Medicine and Rehabilitation, Oslo University Hospital, Ulleval, Norway
bFaculty of Medicine, University of Oslo, Norway
cDepartment of Health Sciences, Institute of Health and Society, University of Oslo, Norway
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2. Norwegian version of the Neck Disability Index
Supplemental PowerPoint Slides
Norwegian version of the Neck Disability Index
In the present paper the Rasch model was used to analyze the unidimensionality, scaling and invariance of the NDI across gender, age, education and work status in chronic neck pain patients in specialized care.
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3. Supplemental PowerPoint Slides
The data did not fit the Rasch model.
Three items (lifting, reading, driving) had disordered response thresholds.
The pain, headache and sleep items did not fit the Rasch model.
Differential item function was detected for work status.
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4. The Neck Disability Index Conclusions
Supplemental PowerPoint Slides
The Neck Disability Index Conclusions
The Rasch analysis lends support to:
the unidimensionality of seven items of the NDI
its usefulness in capturing the neck patients’ disability
the NDI being generally robust to external factors.
Copyright © 2012 Lippincott Williams & Wilkins. Unauthorized commercial reproduction of this slide is prohibited