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Classifying injury severity

The Guidelinesrecommend classifying the whiplash injury to indicate severity. The Quebec Task Force Classification of Grades of Whiplash Associated Disorders is shown in the table below (A4, page 18 guidelines). Symptoms and disorders that can manifest in all grades include deafness, dizziness, tinnitus, headache, memory loss, dysphagia and temporomandibular joint pain.

Grade Classification
0 No complaint about the neck.
No physical sign(s).
I Complaint of neck pain, stiffness or tenderness only.
No physical sign(s).
II Neck complaint AND musculoskeletal sign(s).
Musculoskeletal signs include decreased range of movement and point tenderness.
III Neck complaint AND neurological sign(s).
Neurological signs include decreased or absent tendon reflexes, weakness and sensory deficits.
IV Neck complaint AND fracture or dislocation.

Source
Spitzer, W.O., Scientific monograph of the Quebec Task Force on Whiplash-Associated Disorders: Redefining ‘whiplash’ and its management. Spine, 1995. 20: p. 1-73.