Whiplash-Associated Disorder (WAD)

Who: Anyone off a motor vehicle collision, or an equivalent acceleration–deceleration mechanism. Often within 48 hours, often already imaged, sometimes already in a collar.
What: Neck pain and stiffness ± headache, ± shoulder or upper-thoracic referral, ± dizziness or visual disturbance.
How it behaves: Aggs: movement, sustained postures, load, and often the drive home. Eases: rest early, then movement. Symptoms commonly ↑ over the first 24–72 h — say that before it happens, or the phone call on day three sounds like a deterioration.

The illness script in one line:

An acceleration–deceleration load that leaves a mechanically irritable, guarded neck in everyone — and in about half of them, a sensitised nervous system and a live stress response that are still there a year later.

The one thing to take from this page:

The subjective carries almost the whole reasoning load. The objective is a safety check plus a baseline. The question is not "what tissue got hurt in the crash". It is "is there a fracture, is there a root or a vessel involved, and is this one of the half who will still be in pain in a year?"

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✅ The guideline banner — read it exactly

Australia has a whiplash guideline, and it is an unusually strong one.

What it is. The Australian Clinical Guidelines for Health Professionals Managing People with Whiplash-Associated Disorders, Fourth Edition, developed by SIRA NSW with the John Walsh Centre for Rehabilitation Research — an 18-member multidisciplinary panel, GRADE Evidence-to-Decision, built to the NHMRC Standard, registered on the Australian Clinical Practice Guidelines Register on 27 April 2021, public consultation 5 June – 5 July 2023.

What it covers. Diagnosis, prognosis, treatment AND assessment, in both acute and chronic WAD, with a strength rating and a panel vote count on every single item, plus two care flowcharts that carry the review timeline. Evidence base: 44 RCTs acute, 19 chronic; 57 prospective cohorts for acute prognosis, 6 for chronic.

What it does NOT cover, and you say all three out loud. ① Its approval status is unresolved. The administrative report says it will be submitted to the NHMRC for consideration of approval after public consultation; nothing found confirms that approval happened. ② SIRA still names the third edition. SIRA's own whiplash page — last updated 19 December 2024, read live 1 Sep 2026 — describes the December 2014 third edition as its guidelines, and that document stops at 12 weeks. ③ It makes no recommendation for WAD-associated headache and sends you to the headache guidelines instead.

So: anchor to the fourth edition, name the third, and tell your educator which is which. When they ask "says who?", the Canadian C-Spine Rule and the prognostic tools are Australian strong-for. The chronic pathway is a guideline whose approval status nobody has confirmed.

The grade, and where it came from — know the provenance

A student will be asked to grade a patient with this, so know what you are holding.

• Source. WAD grades 0–IV come from the Quebec Task Force scientific monograph, which also coined the term "whiplash-associated disorders" [11]. Thirty-one years on it is still the classification the guideline, the insurer and the literature all run on.
• How the Australian guideline operationalises it. WAD 0–II on cervical ROM and palpation · WAD III on neurological assessment · WAD IV on the Canadian C-Spine Rule.
• Superseded? No. Challenged, yes — and never replaced. Sterling proposed swapping it for a measurable motor / sensory / psychological profile because the QTF version "is primarily based on the severity of signs and symptoms" and "its usefulness has been questioned" [12]. That proposal has never been validated as a replacement system.
• Two cracks you must know. Inter-rater κ ran 0.04 to 0.80 across three raters scoring the same 80 patients — the grade is only as good as the training behind it (Shergill et al. 2021). And grade II, defined by the absence of nerve involvement, shows the same sensory dysfunction and nerve mechanosensitivity as everyone else: predominantly neuropathic symptoms in 34%, abnormal electrodiagnostic testing in 32% (Fundaun et al. 2022).
• In practice: grade it, record it, and hold it loosely. In a NSW audit of 288 claimant files the QTF classification was actually recorded in 19.9% of them [13].

Patterns > Labels. "WAD II" names a severity band with a leaky definition and unreliable scoring. A guarded, movement-provoked neck after a collision, cleared on the Canadian C-Spine Rule, with a risk score attached names the problem you can actually manage this week. Check the grade with your clinical educator.

The order changes here, and this is the page that shows you why. Your course teaches the five stages as main problem → body chart → behaviour → history → special/screening questions. For an acute traumatic presentation it reorders to:

MAIN PROBLEM → BODY CHART → HISTORY → BEHAVIOUR → SPECIAL / SCREENING QUESTIONS

History moves up because after a collision the history is the safety step. Mechanism, age, what has already happened to them — imaging, an ED visit, a collar, a claim — decides whether you are allowed to test cervical rotation at all. You cannot code a 24-hour pattern on a neck you have not yet cleared. Run the acute order, write it in your S/E in that order, and say why if your educator asks.

And 70/30 applies especially hard here. By the end of the subjective you have the grade, the fracture decision, the differential and — the part that matters — the prognosis. The P/E gives you asterisk signs and a baseline.

MAIN PROBLEM

"I was stopped at the lights and someone went into the back of me. I felt alright that night. The next morning I couldn't turn my head to reverse out of the driveway."

Delayed onset is normal, not reassuring and not alarming. Ask what they think is wrong and what they expect will happen — their expectation of recovery is a strong-for prognostic factor, and it is free.

BODY CHART

Draw it, mark P1 and P2 separately, mark φp where it is genuinely pain-free, then read it against the list.

Count the areas, don't just draw them. The number of painful body areas and the number of painful symptoms are both strong-for prognostic factors in the Australian guideline (9/12, 75% of the panel). A body chart with widespread marks on it is a prognosis, not just a picture.

HISTORY

Mechanism, timeline, and what has already been done. Then the part this page exists for.

The crash does not predict the outcome. Say it out loud — it is the single most common thing they will raise.

• The Australian guideline rates every crash factor conditional against as a prognostic factor: injury severity score, head restraint, head position at impact, awareness of collision, vehicle type, speed, seatbelt, self-reported collision severity, position in vehicle, airbag, direction of impact — 9/13 (69%) conditional against, with 4/13 (21%) going strong against.
• Strong evidence across 50 papers and 29 prospective cohorts that rear-end collision is NOT associated with an adverse prognosis [14].
• A NSW meta-review of 12 systematic reviews: factors related to the collision were not associated with continuing pain and disability [15].

What does predict — and you can measure all of it at visit one.

And the negative list is the useful half. Across 31 studies, anxiety, travel anxiety, depression, personality, pre-collision distress, general psychological distress and avoidance behaviour were NOT associated with chronic WAD (Campbell et al. 2018). Only poor expectations of recovery, post-traumatic stress symptoms and passive coping were consistent.

The prognostic screen — the highest-value five minutes on this pattern

• Use a tool, not an impression. WhipPredict and the SF-OMPSQ (Örebro) are both STRONG FOR, 9/9 — 100% of the panel. That is the same strength rating the guideline gives the Canadian C-Spine Rule.
• The whiplash CPR is three history items: age, initial NDI, and hyperarousal symptoms. Full recovery predicted by age <35 and initial NDI ≤32%; ongoing moderate/severe pain and disability predicted by age ≥35, initial NDI ≥40% and hyperarousal. PPV 90.9% for ongoing moderate/severe disability, 80.0% for full recovery, in 101 people [18].
• ⚠️ And it is a retrospective secondary analysis. Only 3 prognostic CPRs in this field have been externally validated and none has had an impact analysis [19]. The rule predicts. Nobody has shown that acting on it helps.
• The uncomfortable finding, and the reason to use the tool anyway. Physiotherapist risk judgement was compared with the CPR in 38 patients and 24 therapists. Agreement in 11/38 (29%) of cases, κ = −0.03 (95% CI −0.17 to 0.12) — worse than chance. Therapists were mostly reading range of movement (61%), and they planned the same number of sessions regardless of risk (χ²(2) = 2.69, p = 0.26) [20].

BEHAVIOUR

• Coding: M / In / P / Is. Morning stiffness <30 min = M, >30 min = In. Most acute WAD codes P early (constant, movement-provoked) and shifts to Is as it settles.
• 24-hour pattern: expect it to be worse over the first 24–72 h, then to track down. A neck that is escalating past 72 h with new symptoms goes back to §4, not into a progression.
• Severity: VAS 0–10 at best / at worst / right now.
• Irritability — all three parts, and it sets your dose. Resting symptoms + vigour of the provoking activity + time to settle. High irritability → AROM to P1 only, no overpressure, and no PAIVMs above Grade II. Low irritability → full P/E and a loading plan on day one.
• Ask what they have stopped doing. Driving is the one they will not volunteer.

SPECIAL / SCREENING QUESTIONS

Every one of these, every time — and they are all free (§4).

• Canadian C-Spine Rule questions before you test rotation (§4).
• 5 D's and 3 N's — dizziness, diplopia, dysarthria, dysphagia, drop attacks; nausea, nystagmus, numbness. Plus: is this head or neck pain new and unfamiliar?
• UMN symptoms — clumsy hands, dropping things, gait change, bladder change.
• Dermatomal or myotomal symptoms below the shoulder.
• Post-traumatic stress, at week 3–4 in the medium/high-risk group: PCL-5, ± depression, catastrophising, coping. That is exactly where the guideline's flowchart puts it.
• Systemically unwell, unexplained weight loss, night pain that wakes and won't settle with position.

Order of operations on this pattern: rule out the dangerous thing (§4), then grade, then discriminate. Fracture/dislocation (WAD IV), cervical arterial dysfunction and myelopathy all live in §4 and are free. What follows is what is left.

Top three, one discriminating feature each.

And the one that isn't a competing diagnosis at all.

Post-traumatic stress as the driver. Not a differential — a competing explanation for why they are not recovering. Screen it at week 3–4 with the PCL-5 if medium/high risk. 14.9% of a 229-person cohort ran a chronic PTSD-symptom trajectory, and that group carried more pain-related disability at 6 months (Ravn et al. 2019). PTSS is strong-for prognostically (12/13, 92%).

The boundary between grade II and grade III leaks, so hold it loosely. Across 54 studies and 390,644 patients: predominantly neuropathic symptoms in 34% (range 25–75), nerve pathology on neurological examination in 13%, on electrodiagnostic testing in 32% — and the same sensory dysfunction and nerve mechanosensitivity (median nerve PPT SMD −1.10, 95% CI −1.50 to −0.70; neurodynamic tests SMD 1.68, 0.92–2.44) appeared in grade II, whose definition is the absence of nerve involvement (Fundaun et al. 2022). A grade II is not proof of a clean nerve. Check the neurological examination with your clinical educator, and repeat it.