Spinal Sprain Grades: How Whiplash Severity Is Classified

By Dr. Justin M. Dick, DC, CNMT, ARRT(N)(CT) | Clear Life Scoliosis and Chiropractic Center, Charlotte, NC | Published October 16, 2026

Three grading systems show up in records after a car accident, and they measure different things. Ligament sprain grades describe how badly a ligament is torn. The Quebec Task Force grades describe what the exam shows. The Croft grades add ligament injury and instability to the exam findings. Which system a chart uses changes what the record can say about the injury, so I explain all three to patients and attorneys in Charlotte.

Ligament Sprain Grades I to III

The American Academy of Orthopaedic Surgeons defines a sprain as a stretch or tear of a ligament and grades it by severity. A grade 1 sprain is slight stretching with some damage to the ligament fibers. A grade 2 sprain is a partial tear. A grade 3 sprain is a complete tear (AAOS OrthoInfo).

That system was built for joints such as the ankle, where a clinician can stress the joint by hand and feel how much it gives. Spinal ligaments sit deep and cannot be stress-tested by hand that way. In the spine, the closest equivalent to a stress test is a flexion and extension X-ray, which measures how far a segment moves against the AMA Guides thresholds.

The Quebec Task Force Grades 0 to IV

The Quebec Task Force on Whiplash-Associated Disorders published its classification in 1995 (Spitzer, Spine 1995). Grade 0 means no neck complaint and no physical signs. Grade I is neck pain, stiffness, or tenderness with no physical signs. Grade II adds musculoskeletal signs, meaning decreased range of motion and point tenderness. Grade III adds neurologic signs, such as decreased or absent reflexes, weakness, or sensory loss. Grade IV is a fracture or dislocation. The task force's own work covered grades I through III and set fractures and dislocations outside its mandate.

The system is simple and widely used. It also has no category for ligament instability. A patient with measurable instability and no neurologic signs would be grade II, the same grade as a patient with only tenderness and stiffness.

The Croft Grades 1 to 5

Croft's system predates the Quebec classification and grades severity with ligament status built in. Grade 1 is minimal, with no limitation of motion, no ligament injury, and no neurologic findings. Grade 2 adds limited motion. Grade 3 adds some ligament injury, with neurologic findings possibly present. Grade 4 adds ligament instability, neurologic findings, and fracture or disc derangement. Grade 5 requires surgical management (Croft, J Chiropr Med 2016).

In a study of 118 whiplash patients, the same group sorted very differently under the two systems. The Croft system placed 32 patients in grade 2, 53 in grade 3, and 32 in grade 4. The Quebec system placed 89 in grade II and 28 in grade III. Both systems correlated with recovery, and the Croft system predicted it better. The study's lead author developed the Croft system, the sample came from a previous case-control study, and it is one study. It is enough to show the two systems are not interchangeable.

What Predicts Recovery

The Bone and Joint Decade Task Force found that greater initial pain, more symptoms, and greater initial disability predicted slower recovery after whiplash (Carroll, Spine 2008). A grade is a summary of findings. The findings themselves, documented at the first visit and followed over time, are what carry prognostic weight.

How I Grade in Practice

I record the Quebec grade because insurers and other clinicians use it. I also record whether ligament injury or instability was tested and what was found, because the Quebec grade cannot hold that information. A chart that says "WAD II" alone does not tell anyone whether instability was ruled out or never examined.

For an example of how post-collision imaging findings and outcomes are documented in the peer-reviewed literature, read Dr. Justin Dick's published case report on refractory lumbar pain following a motor vehicle accident in a geriatric patient.

Schedule Your Evaluation

Frequently Asked Questions

What are the grades of a ligament sprain?

A grade 1 sprain is slight stretching with some fiber damage, grade 2 is a partial tear, and grade 3 is a complete tear, according to the American Academy of Orthopaedic Surgeons.

What are the Quebec Task Force whiplash grades?

Grade 0 is no complaint or signs, grade I is pain or stiffness without signs, grade II adds decreased range of motion and point tenderness, grade III adds neurologic signs, and grade IV is fracture or dislocation (Spitzer, Spine 1995).

What is the Croft whiplash grading system?

The Croft system grades whiplash from 1 to 5 and includes ligament injury and instability: grade 3 includes some ligament injury, grade 4 includes ligament instability, and grade 5 requires surgery.

Which whiplash grading system predicts recovery better?

In one study of 118 patients, the Croft system predicted recovery better than the Quebec system (Croft, J Chiropr Med 2016). The lead author developed the Croft system, and it is a single study.

Does a WAD II diagnosis mean ligament instability was ruled out?

No. The Quebec system has no category for instability. Dr. Justin Dick in Charlotte, NC records the Quebec grade along with whether ligament injury was tested and what was found.

Where can I get a whiplash injury graded and documented in Charlotte, NC?

Dr. Justin Dick, DC, CNMT, ARRT(N)(CT), grades and documents whiplash injuries at Clear Life Scoliosis and Chiropractic Center, 8814 Rachel Freeman Way, Suite 103, Charlotte, NC 28278, phone 980-368-0766. Personal injury patients are treated on a lien basis, with no out-of-pocket payment at the time of care.

Sources and Evidence Tiers

1. American Academy of Orthopaedic Surgeons. Sprains, Strains, and Other Soft-Tissue Injuries. OrthoInfo. LinkEvidence tier: Professional society patient education (expert opinion)
2. Spitzer WO, Skovron ML, Salmi LR, et al. Scientific monograph of the Quebec Task Force on Whiplash-Associated Disorders: redefining whiplash and its management. Spine. 1995;20(8 Suppl):1S-73S. PMID 7604354. LinkEvidence tier: Task force consensus monograph (expert consensus)
3. Croft AC, Bagherian A, Mickelsen PK, Wagner S. Comparing 2 whiplash grading systems to predict clinical outcomes. J Chiropr Med. 2016;15(2):81-86. PMID 27330509. LinkEvidence tier: Secondary analysis of a case-control sample (118 patients); lead author developed one of the systems compared
4. American Medical Association. Guides to the Evaluation of Permanent Impairment, Fourth, Fifth, and Sixth Editions.Evidence tier: Expert consensus (impairment rating guideline)
5. Carroll LJ, Holm LW, Hogg-Johnson S, et al. Course and prognostic factors for neck pain in whiplash-associated disorders: results of the Bone and Joint Decade 2000-2010 Task Force. Spine. 2008;33(4 Suppl):S83-S92. PMID 18204405. LinkEvidence tier: Best evidence synthesis (systematic review)

Service Area

Clear Life Scoliosis and Chiropractic Center sees personal injury and spinal imaging patients from Charlotte NC, Huntersville NC, Ballantyne NC, Matthews NC, Concord NC, Mooresville NC, Rock Hill SC, and Fort Mill SC.

Related Pages

• Personal injury and car accident spinal care in Charlotte
• Dr. Justin Dick's research
• Case report: refractory lumbar pain after a motor vehicle accident
• Research and evidence at Clear Life
• Questions and answers
• Our team
• Press
• Book your evaluation
• Contact Clear Life

Schedule Your Evaluation in Charlotte

This article is educational and is not a diagnosis. Imaging decisions depend on an in-person examination.