Musculoskeletal
Neck Disability Index (NDI) Calculator
The Neck Disability Index is the most widely used self-report outcome measure for neck pain. It assesses how neck pain affects daily activities across 10 domains.
Formula
Total score / 50 × 100 = % disability
Normal Range
0-8%: No disability | 10-28%: Mild | 30-48%: Moderate | 50-64%: Severe | >64%: Complete
Clinical Use
Cervical spine physiotherapy, whiplash assessment, post-surgical outcomes.
Use the Calculator
Enter patient values and get instant AI-powered clinical interpretation.