Whiplash-Associated Disorder

Neck pain after an acceleration-deceleration mechanism — almost always a rear-end motor vehicle collision — is whiplash-associated disorder (WAD) until assessed otherwise. Most patients recover with active management; the job in the first consultation is excluding a fracture, grading severity, and setting the patient up for that recovery rather than immobilising them into a worse outcome.

Grading — Quebec Task Force

• Grade 0 — no neck complaint, no signs.
• Grade I — neck pain, stiffness or tenderness only; no physical signs.
• Grade II — neck complaint plus musculoskeletal signs (reduced range of motion, point tenderness).
• Grade III — neck complaint, musculoskeletal signs, and neurological signs (reduced or absent reflexes, weakness, sensory deficit).
• Grade IV — neck complaint with fracture or dislocation.

Grade IV needs imaging and fracture management, not this page’s pathway.

Rule out a fracture first — the Canadian C-Spine Rule

Apply the Canadian C-Spine Rule to decide who needs imaging. Any high-risk factor — age 65 or over, a dangerous mechanism, or paraesthesiae in a limb — mandates imaging regardless of anything else. Without a high-risk factor, check for a low-risk factor that allows safe assessment of movement (a simple rear-end collision, sitting position after the crash, ambulatory at some point since, delayed onset of neck pain, no midline tenderness) — if none is present, the patient is not low-risk and needs imaging. If a low-risk factor is present, ask the patient to actively rotate their neck 45° each way: if they can, no imaging is needed; if they can’t, they need imaging.

Active management, not a collar

Advise patients to minimise use of a cervical collar and provide assurance that recovery in the first one to two months is likely. Encourage return to work and usual activities as soon as feasible and safe — prolonged rest and immobilisation are what turn an acute strain into a chronic problem, not the injury itself. Manual therapy to the cervical and upper thoracic spine helps patients with restricted movement on examination; from six weeks onward, exercise targeting cervical and scapulothoracic endurance becomes more important than manual therapy. Analgesics have variable, limited effectiveness — use the lowest-risk option at the lowest effective dose for the shortest time needed.

Prognosis and the yellow flags

Three broad trajectories are seen after an acute traumatic neck injury: roughly 45% have mild problems with rapid recovery, 40% have moderate, incomplete recovery, and 15% have severe, ongoing problems. Recovery is fastest in the first six to twelve weeks, slows considerably after that, and rarely progresses much further after twelve months — this timeline is worth explaining to the patient up front.

Assess yellow flags at the first visit — they drive chronicity more than the injury severity does. Anxiety, depression, job stress and poor job satisfaction are addressable risk factors for a poor outcome; initial high pain/disability, female sex and older age are non-modifiable ones worth knowing about. A brief two-question depression screen is a practical way to capture this early rather than waiting for the patient to raise it.

Documentation and follow-up

Follow the patient’s progress actively and escalate to interdisciplinary management (physiotherapy, psychology) if recovery is slow by four to six weeks, rather than waiting for the patient to plateau. Where a compulsory third-party (CTP) claim or other insurer paperwork is involved, document the mechanism, grade, red-flag assessment and management plan clearly at the first visit — this record is what the claims process will draw on later, and a thin initial note makes a later dispute harder for the patient to resolve.