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.

Use the full interactive calculator below, or

Related Calculators

Oswestry Disability Index

Hyper-niche Medical

Nurick mJOA Myelopathy