About the Score
Originally published in 1991 in the Journal of Manipulative and Physiological Therapeutics, the Neck Disability Index (NDI) is an instrument to measure patient-reported disability secondary to neck pain. It was developed utilizing the Oswestry Low Back Pain Index as a model and therefore, at the time of its creation, was distinguished from other simpler pain assessments by examining patient function with respect to activities of daily living.
This 10-item tool may be useful in patients with chronic neck pain and those with musculoskeletal problems or cervical radiculopathy. The NDI is the most popular self-report scale for neck pain patients.
Average time to complete: 3- 10 minutes.
Use the following EVALUATION FORM to evaluate your patient and PRINT THE FORM when the evaluation is completed.
- NDI can be used as a raw score or a percentage score.
- A higher score indicates that the patient evaluates the level of functional decline as higher.
- Minimum detectable change (with 90% confidence): 5 points or 10%. (Reference)
- Vernon, Howard, and Silvano Mior. “The Neck Disability Index: a study of reliability and validity.” Journal of manipulative and physiological therapeutics 14.7 (1991): 409-415.
- Young, Brian A., et al. “Responsiveness of the Neck Disability Index in patients with mechanical neck disorders.” The Spine Journal 9.10 (2009): 802-808.
- Young, Ian A., et al. “Reliability, construct validity, and responsiveness of the neck disability index, patient-specific functional scale, and numeric pain rating scale in patients with cervical radiculopathy.” American journal of physical medicine & rehabilitation 89.10 (2010): 831-839.
- Vernon, Howard. “The Neck Disability Index: state-of-the-art, 1991-2008.” Journal of manipulative and physiological therapeutics 31.7 (2008): 491-502.