The medical reality is less tidy. Recovery does not always end on the date given in a report. Claimants improve gradually, fluctuate, relapse, plateau or respond differently to treatment. Pain may settle before function returns. Function may improve before confidence returns. Psychological symptoms may persist after physical symptoms have resolved. The expert must therefore do two things at once: give a clear prognosis the court can use, while avoiding false precision the evidence does not justify. A prognosis is not a deadline.
When an expert says symptoms should resolve within nine months, they are not saying recovery will occur neatly on the final day of month nine. They are expressing a clinical judgement based on the mechanism of injury, the claimant’s history, records, examination findings, treatment response and recovery pattern to date. The opinion may be firm. It may be guarded. It may depend on treatment, further records or rehabilitation. The report should say so. The prognosis date should guide the parties, but it should not pretend to stop time.
The court still needs clarity. An expert cannot avoid prognosis because it is difficult. The parties need to understand duration, treatment needs, functional restriction and whether ongoing symptoms remain linked to the accident. Without that, valuation and settlement become harder.This is the tension. Medicine deals in uncertainty. Litigation needs decisions. The expert’s role is to translate clinical uncertainty into a usable opinion without overstating it. A vague prognosis is unhelpful. A falsely precise prognosis is unsafe. The strongest reports sit between those extremes.
A prognosis should be based on the claimant’s actual recovery to date, not a standard recovery period imposed without analysis. The report should consider improvement, symptom pattern, treatment response, return to work, driving, sleep, domestic activity, psychological symptoms and any pre-existing problems.
These questions matter because prognosis is not determined by diagnosis alone. Two claimants with the same broad injury may recover differently because of age, work demands, prior symptoms, pain response, delayed treatment, sleep disturbance or anxiety. The expert should explain why the timeline fits this claimant, not just the average claimant.
Litigation also creates its own timetable. Reports may be requested before recovery is complete. Settlement may be considered before treatment has ended. Part 35 questions may be asked months after examination. Updated records may show improvement or deterioration. Trial may occur long after the original prognosis period has expired. A report written early may therefore need to be tested against what happened.
The expert should be prepared to revise an opinion where the evidence changes. That is not inconsistency. It is proper expert practice.
Whiplash claims show the problem clearly. The prognosis period is often central to valuation. In tariff cases, the duration of injury matters directly. But whiplash recovery is not always simple. Pain, headaches, travel anxiety and pre-existing neck symptoms may follow different courses, and that can complicate the accident-related period.
The expert should avoid treating prognosis as a tariff exercise alone. The medical opinion must come first. The report should explain the duration of accident-related symptoms, the functional effect during that period, and whether ongoing symptoms are more likely due to pre-existing or unrelated factors.
Psychiatric prognosis is even less linear. A claimant may improve with therapy but relapse when exposed to reminders. They may return to work but remain avoidant of driving. They may no longer meet diagnostic criteria but remain functionally affected.
A psychiatric prognosis should explain treatment needs, response, relapse risk and functional goals. Full recovery, partial recovery and symptom management are not the same thing. A prognosis that says “recovery in twelve months” may be too blunt if what is really meant is improvement with residual vulnerability.
A prognosis should also be linked to function, not symptoms alone. When is the claimant likely to return to work, resume driving, manage domestic tasks, reduce treatment or end accident-related restrictions? This makes the opinion more useful. Ongoing symptoms are not always the same as ongoing accident-related loss.
A good prognosis section should make its assumptions visible. The opinion may assume that the claimant’s history is accurate, that the medical records are complete, that treatment will be pursued, or that no further injury occurs. If later records show prior symptoms, delayed treatment, inconsistent function or unrelated events, the prognosis may change.
Court realities often favour a fixed period. Medical reality may justify a range. It may be more accurate to say recovery is likely within six to nine months, or that further improvement is expected over three to six months with treatment. A range should not be used to avoid an opinion. It should be used where the evidence does not justify a single endpoint.
The first report should not be treated as immovable. A supplementary report may be needed where later evidence materially affects recovery, causation or function.
Prognosis can also become strategic. Claimant representatives may prefer a longer prognosis. Defendants may press for a shorter one. The expert should not be pulled into that contest. The prognosis should be based on the evidence, not the advantage it gives either party. If ongoing symptoms are only partly accident-related, explain the distinction. If uncertainty remains, state it.
The real task is not to produce a neat timeline. It is to produce a reasoned timeline. The court needs clarity, but clarity should not be confused with overconfidence. The expert should explain duration, return of function, treatment, pre-existing conditions and the limits of the evidence.
That is the bridge between medical reality and court reality. Prognosis will always involve judgement. The expert cannot remove uncertainty, but they can make it understandable. That is what makes the opinion useful.
