• Clin J Pain · Jul 2002

    Comparative Study

    The neck pain and disability scale: test-retest reliability and construct validity.

    • Paula Goolkasian, Anthony H Wheeler, and Stephanie S Gretz.
    • University of North Carolina, Charlotte 28223, USA. pagoolka@email.uncc.edu
    • Clin J Pain. 2002 Jul 1; 18 (4): 245-50.

    ObjectiveThis research established test-retest reliability and construct validity for the Neck Pain and Disability Scale (NPAD).MethodsTwo groups of patients with neck pain completed the NPAD. The first group filled out the scale twice before treatment, whereas the second completed it with a number of other outcome measures once a month for 4 months, for evaluation of treatment with injections.ResultsThe reliability coefficient (r2 = 0.93) calculated from the data for the first group of patients indicated high test-retest reliability. Construct validity was demonstrated with the second group when the NPAD was compared with a number of other pain measures and found to have a larger treatment effect. The Neck Pain and Disability Scale factor scores also indicated that treatment effects varied across the four factors.ConclusionsThe NPAD is a stable and responsive measure for patients with neck pain. The Neck Pain and Disability Scale factor scores are useful in identifying treatment effects on the specific dimensions involved in the pain experience.

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