What NDI score indicates severe disability?

NDI 0-4: no disability. 5-14: mild (10-28%). 15-24: moderate (30-48%). 25-34: severe (50-64%). >35: complete disability (70-100%). MCID: 5 points (on 0-50 scale) or 10%.

What spine surgery outcomes use NDI?

NDI is the primary outcome measure in anterior cervical discectomy and fusion (ACDF), cervical disc arthroplasty (CDA), and cervical foraminotomy trials. Baseline NDI >40% predicts greater surgical benefit.

How does NDI relate to visual analog scale pain?

NDI correlates moderately with neck pain VAS (r ~0.55-0.65). NDI captures functional disability beyond pure pain. Patients with high NDI but moderate pain have significant functional limitation often driven by activity avoidance and fear of movement.

Neck Disability Index (NDI) for Cervical Spine Conditions

Calculate the Neck Disability Index (NDI) for cervical spine pathology including radiculopathy, myelopathy, and whiplash. 10 items each scored 0-5. Total 0-50 (or percentage 0-100%). Score >28 (>56%) indicates severe/complete disability.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.

How to Use

Enter the values for the scenario you are assessing. Calculate the Neck Disability Index (NDI) for cervical spine pathology including radiculopathy, myelopathy, and whiplash. 10 items each scored 0-5. Total 0-50 (or percentage 0-100%). Score >28 (>56%) indicates severe/complete disability. Use the neck disability index result to inform your calculation.

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