Neck Disability Index (NDI)

The Neck Disability Index asks how neck pain affects 10 parts of daily life, from personal care and lifting to reading, driving, and sleep. Each section scores 0 to 5, and the total, from 0 to 50, measures neck-related disability: the higher, the worse. See how to score it and turn it into a percentage, what each level and each change means, and record the result with the free template. The official form comes from its source.

  • Score bands explained
  • Recording template to copy
  • Two recorded examples

NDI result template

Free
NECK DISABILITY INDEX RESULT

Date: [Date]
Patient: [Name or ID, age]
Visit: [Initial exam, re-exam, progress visit, or discharge]
How completed: [Official NDI form on paper or tablet; by the patient or read to them word for word; language version]

NECK PROBLEM
Presenting complaint: [Neck pain, with or without arm symptoms or headaches]
Onset: [Date, and how it started: gradually, an injury, a collision, or after surgery]
Working diagnosis: [Mechanical neck pain, whiplash-associated disorder, cervical radiculopathy, or other]

NDI TODAY
Sections answered: [Number out of 10; any left blank, and why]
Raw score: [Total out of 50]
Percent: [Raw score doubled, or prorated for blank sections]
Disability level: [None, mild, moderate, severe, or complete]
Sections of note: [Sections scoring 3 or more, such as headaches, sleeping, or driving]

COMPARED WITH BASELINE
Baseline NDI: [Date, raw score, and percent]
Scores since: [Dates and raw scores]
Change: [Points down or up, and whether it passes the change your clinic counts as meaningful]

FINDINGS ALONGSIDE
Pain rating: [0 to 10, now and at worst]
Exam: [Cervical range of motion, neurological screen of the arms, and other key findings]
Barriers to recovery: [Sleep, mood, fear of movement, work demands, or none found]

PLAN
Treatment: [Exercise, manual therapy, education, home program, or medicine review]
Referral: [To whom, why, and how soon, or none]
Work and driving: [Full duties, modified duties, time off, and any limits]
Next NDI: [Date or visit number]

Clinician: [Name, credentials]

Get the official NDI from its source.

Who holds it

Dr. Howard Vernon (© 1991), who developed it with Dr. Silvano Mior. Distributed by Mapi Research Trust.

How you may use it

The NDI is copyrighted. Students, physicians, clinical practices, and unfunded academic users can download the official form and its translations free from ePROVIDE after a free sign-up. Funded research, healthcare organizations, commercial users, and software companies send a request, and fees may apply; electronic versions need a license. The form isn’t to be retyped, changed, or translated without permission.

Use it for

  • Physical therapy
  • Chiropractic care
  • Whiplash follow-up
  • Cervical radiculopathy
  • Spine surgery outcomes
  • Return-to-work planning

What the score means. 0 to 50, disability points out of 50, higher means more disability.

0 to 4: No disability

Neck pain, if any, barely touches daily life. The usual target for discharge to a home program.

5 to 14: Mild

Some activities hurt or need care, often long reading, desk work, lifting, or driving, but daily life goes on. Advice, exercise, and staying active; score again at the next reassessment.

15 to 24: Moderate

Neck pain limits work, sleep, or concentration on many days. Treat actively, set goals around the sections that score highest, and check for arm symptoms and barriers to recovery.

25 to 34: Severe

Daily life is badly disrupted. Common in the first weeks after whiplash or with a pinched nerve: do a full neurological screen, look for red flags, and watch for poor sleep, distress, and fear of movement.

35 to 50: Complete

Very little is possible without severe pain. Check the form was filled in as meant, look again for serious or neurological causes, and plan support at home and work with the rest of the team.
  • Each of the 10 sections scores from 0, no disability, to 5, the most. Add them for a total from 0 to 50. Higher means more disability.
  • Many clinics double the total to report a percentage: 18 out of 50 is 36%. On that scale the levels are 0 to 8% none, 10 to 28% mild, 30 to 48% moderate, 50 to 68% severe, and 70% or more complete. Most studies report out of 50, so always say which one you wrote.
  • The levels come from Vernon and Mior. Vernon’s own review gives the top level as both “over 34” and “greater than 35”; this page uses 35 to 50 so the levels meet. Other authors have set their own cutoffs for recovered and not recovered, so read the level as a description, not a decision.
  • Blank sections: with one blank, score out of the sections answered. Divide the total by 5 times the number answered and multiply by 100 for the percentage, or by 50 for the score out of 50. Some clinics prorate two blanks the same way. With three or more blank, Vernon’s review says the score may not be valid.
  • The section most often left blank is driving, by people who don’t drive. Score the form from the other nine and record why that section is blank.
  • There is no single minimal clinically important difference. Vernon’s 2008 review suggested 3 to 5 points out of 50 for neck pain in general; later studies found about 7.5 points in mechanical neck pain and 7 to 8.5 in cervical radiculopathy.
  • Several studies put the measurement error for one patient near 10 points, and one study in cervical radiculopathy at about 13. A fall of 10 or more is a safe sign of real change; read smaller falls with the trend, the pain rating, and the exam.
  • The NDI was adapted from the Oswestry Disability Index in the late 1980s, first for whiplash, and is now used for neck pain from most musculoskeletal causes, cervical radiculopathy, and after neck surgery.
  • It doesn’t ask about sport, computer work, medicines, or the emotional side of neck pain. Pair it with a pain rating and the exam, and screen for distress when recovery stalls.

How to give it, score it, and read it.

Giving it

The patient fills in the official form on their own, choosing the one statement in each section that fits them best at present. It takes about 5 minutes and needs no training.

  • Use the official form in the patient’s language, with its own instructions
  • Give it before treatment starts, so the first score is a true baseline
  • If two statements in a section seem to fit, ask the patient to pick the one closest to how they are now
  • Check every section is marked before the patient leaves

Avoid: Filling it in for the patient from the history. The NDI records how the patient rates their own limits.

Scoring

Each section scores 0 to 5. Add the 10 sections for a total from 0 to 50, or double it for a percentage.

  • Write the raw score out of 50 and the percent side by side
  • Note which sections score 3 or more, since they set the goals
  • Use the same scale every time in the same chart

Avoid: Writing “NDI 30” with no unit. Out of 50 it is severe; as a percentage it is moderate.

Blank sections

Ask about any blank before the patient leaves. If a section truly doesn’t apply, such as driving for someone who doesn’t drive, score from the sections answered.

  • One blank: the total divided by 45, times 100, gives the percentage
  • Two blanks: prorate the same way, dividing by 40, if your clinic allows it
  • Three or more: the score may not be valid, so ask the patient to complete the form again
  • Write which section was blank and why

Avoid: Counting a blank as 0. It lowers the score and makes the patient look better than they are.

Reading the score

The level gives a word for the total; the sections show where neck pain gets in the way.

  • Name the level next to the score, and the sections that drive it
  • Read it with the pain rating, range of motion, and a neurological screen of the arms
  • Check for red flags with a high score: night pain, weight loss, fever, or signs of spinal cord compression such as clumsy hands or an unsteady walk
  • In whiplash, a high score in the first weeks goes with a slower recovery, so look early for poor sleep, distress, and fear of movement

Avoid: Treating the level as a diagnosis. A score of 27 says how much neck pain limits life, not why.

Tracking change

Score it at the first visit, at each re-exam, and at discharge, given the same way each time.

  • Compare with the baseline in points out of 50
  • A fall of 10 points or more is a safe sign of real change for one patient
  • A fall of 5 to 9 points may matter to the patient; check it against the trend and the exam
  • Review the plan when the score hasn’t moved in 4 to 6 weeks

Two recorded results. Every part, filled in.

Each one follows the recording template. Use them to judge how much to write.

NDI result: office worker with neck pain after 6 weeks of therapy

Outpatient physical therapy, re-exam at visit 8, 6 weeks after the evaluation

Neck problem

41-year-old accountant. Right-sided neck pain for 3 months, worst by late afternoon and during month-end deadlines. No injury, no arm pain or tingling. Working diagnosis: mechanical neck pain with reduced mobility and poor endurance of the deep neck muscles.

NDI today

All 10 sections answered on the clinic tablet. Raw score 9 out of 50: 18%, mild. No section at 3 or more; reading is the highest at 2, as the neck aches after about half an hour at the screen.

Compared with baseline

Baseline 18 out of 50, 36%, moderate, on September 28. 13 at visit 4. Down 9 points, half the starting score: past the 7.5 points found to matter in mechanical neck pain, just short of the 10 points that rules out measurement error. With the steady fall and the exam, a real improvement.

Findings alongside

Pain 2/10 now and 4/10 at worst, from 5 and 7 at baseline. Rotation right 70°, from 50°; left 75°. Deep neck flexor endurance 32 seconds, from 14. Neurological screen of the arms normal. Sleeping through the night again.

Plan

Visits every 2 weeks for 4 weeks, then discharge to the home program: deep neck flexor and shoulder blade strengthening, a movement break every 45 minutes, and the monitor raised to eye level. Goal: NDI 4 or less and a full workday without pain above 3/10. Next NDI at the discharge visit.

Common mistakes, and how to avoid them.

Mixing raw scores and percentages

An NDI of 18 and an NDI of 36% are the same result. A chart that switches between them makes a steady patient look twice as bad. Write “out of 50” or “%” every time.

Counting a blank as zero

A form with driving left blank, scored out of 50, under-counts disability. Score from the sections answered and say which one was blank.

Calling a small fall progress

A drop from 22 to 19 can be measurement error. Look for 10 points, or a smaller fall that matches a steady trend and a better exam.

Reading the score without the exam

A severe score doesn’t say why. Screen the arms neurologically, look for red flags and signs of spinal cord compression, and after a collision, ask about concussion symptoms.

Using a retyped copy

Reworded versions circulate online and aren’t validated. Use the official form and its translations, so scores compare across visits and clinics.

Read out the NDI. Check the note.

Vero Scribe records the NDI result in your template from the visit, with the patient’s consent, or from your dictation: the raw score and percent, the sections of note, the change from baseline, and the plan. You review and edit every line, then copy it into your record. Vero works in 60+ languages.

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Frequently asked questions.

How do you score the Neck Disability Index?

Each of the 10 sections scores from 0, no disability, to 5, the most. Add them for a total from 0 to 50. Many clinics double it to give a percentage, so 18 out of 50 is 36%. Higher means more disability.

What does an NDI score mean?

Out of 50, the levels are 0 to 4 no disability, 5 to 14 mild, 15 to 24 moderate, 25 to 34 severe, and 35 or more complete. As a percentage, that is 0 to 8% none, 10 to 28% mild, 30 to 48% moderate, 50 to 68% severe, and 70% or more complete. The levels describe the score; read it with the exam and the sections that score highest.

How do you turn an NDI score into a percentage?

Double the total out of 50: a raw score of 27 is 54%. If a section is blank, divide the total by 5 times the number of sections answered, then multiply by 100. With nine sections answered and a total of 16, that is 16 ÷ 45 × 100 = 35.6%.

What is a meaningful change in NDI score?

Studies differ by condition. Vernon’s 2008 review suggested 3 to 5 points out of 50 for neck pain in general; later studies found about 7.5 points in mechanical neck pain and 7 to 8.5 in cervical radiculopathy. Several studies also put the measurement error for one patient near 10 points, so a fall of 10 or more is a safe sign of real change, and smaller falls are best read with the trend.

What does the Neck Disability Index ask about?

Ten sections: pain intensity, personal care, lifting, reading, headaches, concentration, work, driving, sleeping, and recreation. Each has six statements, and the patient picks the one that fits best. Get the exact wording from the official form on Mapi Research Trust’s ePROVIDE site.

How is the NDI different from the Oswestry Disability Index?

The NDI was built from the Oswestry, which measures disability from low back pain, and keeps its format: 10 sections, each scored 0 to 5. It swaps the back-specific sections, such as walking, sitting, and standing, for reading, headaches, concentration, work, driving, and recreation. The Oswestry is almost always reported as a percentage, while most NDI studies report out of 50.

Who can give the NDI?

The patient completes it, in about 5 minutes, and no training is needed to give or score it. Physical therapists, chiropractors, physicians, and spine surgeons use it most. It was developed for adults with neck pain, first after whiplash.

Is the Neck Disability Index free?

For students, physicians, clinical practice, and unfunded academic research, yes. Download the official form and its translations from Mapi Research Trust’s ePROVIDE site after a free sign-up. Funded research, healthcare organizations, commercial users, and software companies send a request, and fees may apply. The recording template on this page is free to copy or download.

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