Neck Disability Index (NDI)
Neck Disability Index (NDI) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
Open the Neck Disability Index (NDI) → Runs in your browser. No signup, no tracking.
What this is
Neck Disability Index (NDI) is one of 230 deterministic tools in Sophie Well's Clinical Scoring & Risk group. Neck Disability Index (NDI) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
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 ↗
Worked example: Neck Disability Index 40% (20 of 50) — moderate disability.
Sophie Well is a reference and educational tool. Not medical, legal, or financial advice. Does not replace clinician judgment, professional billing review, or legal counsel.