Neck Disability Index (NDI)
Neck Disability Index (Vernon & Mior 1991): 10 sections each 0-5, raw 0-50 reported as a percentage (raw x 2), grading none to complete disability.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Pain intensity
- 2
- Personal care
- 2
- Lifting
- 2
- Reading
- 2
- Headaches
- 2
- Concentration
- 2
- Work
- 2
- Driving
- 2
- Sleeping
- 2
- Recreation
- 2
Result: Neck Disability Index 40% (20 of 50) — moderate disability.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0-28%
- None to mild disability.
- 30-48%
- Moderate disability.
- 50-100%
- Severe to complete disability (10 sections each 0-5; % = raw x 2). A disability index, not a diagnosis.
What you enter
- Pain intensity (0-5)
- Personal care (0-5)
- Lifting (0-5)
- Reading (0-5)
- Headaches (0-5)
- Concentration (0-5)
- Work (0-5)
- Driving (0-5)
- Sleeping (0-5)
- Recreation (0-5)
How this is calculated
Vernon H, Mior S. The Neck Disability Index: a study of reliability and validity. J Manipulative Physiol Ther. 1991;14(7):409-415. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.