ThresholdBrain injury and justice

Six questions nobody has answered

Each of these was searched for deliberately, across more than one strand, and found not to exist. They are absences in the literature rather than gaps in this review, and each is a fundable question. A corpus that can show what is missing is more useful to a research partner than one that can only show what is there.

No United Kingdom study links health records to justice records with a brain injury outcome

Gap 1

The linkage infrastructure exists. Ministry of Justice Data First holds justice data with no health data connected, and the Scottish, Welsh and English assets have not been turned on this question. Ontario ICES and the New Zealand Integrated Data Infrastructure have each produced the study the United Kingdom has not.

Why it matters. Everything downstream of prevalence depends on it: who is affected, where they present first, and what happens to them afterwards.

Authored content pending The study design that would close this gap, the data assets it would need, the likely partners, and an order-of-magnitude cost. To be written by Stan Gilmour and Huw Williams rather than generated, since a proposed design is a professional judgement and not a finding of the review.

No economic or feasibility evaluation of brain injury screening in any justice setting, anywhere

Gap 2

The figures in circulation, including a United Kingdom cost of £43 billion a year and a 16:1 return on rehabilitation, are modelled assumptions from grey literature rather than measured savings. No screening programme in a justice setting has been costed against what it finds.

Why it matters. It is the first question a commissioner asks, and the field cannot currently answer it.

Authored content pending The study design that would close this gap, the data assets it would need, the likely partners, and an order-of-magnitude cost. To be written by Stan Gilmour and Huw Williams rather than generated, since a proposed design is a professional judgement and not a finding of the review.

No United Kingdom study follows mortality in justice-involved people with brain injury

Gap 3

Mortality evidence exists from United States trauma registries and a Western Australian linked cohort. The United Kingdom has the linkage capability and has not used it for this population.

Why it matters. Premature death is the outcome that settles arguments about whether this is a health problem.

Authored content pending The study design that would close this gap, the data assets it would need, the likely partners, and an order-of-magnitude cost. To be written by Stan Gilmour and Huw Williams rather than generated, since a proposed design is a professional judgement and not a finding of the review.

No United Kingdom sibling or twin fixed-effects study

Gap 4

The design that has moved the causal argument everywhere else has not been run here. The Danish cohort of 343,027 that collapsed the association, and the Swedish and Western Australian sibling comparisons that did not, are all from other jurisdictions.

Why it matters. The causal question is the one on which policy either rests or does not, and the United Kingdom has no domestic evidence on it.

Authored content pending The study design that would close this gap, the data assets it would need, the likely partners, and an order-of-magnitude cost. To be written by Stan Gilmour and Huw Williams rather than generated, since a proposed design is a professional judgement and not a finding of the review.

No qualitative metasynthesis, and no ethnography with brain injury as its lens

Gap 5

Single interview studies exist and recur on the same themes. Nobody has synthesised them, and no observational study of a custody suite or a courtroom has taken cognitive impairment as its explicit frame.

Why it matters. The quantitative strands establish that identification fails. Only qualitative work explains how it fails in the room.

Authored content pending The study design that would close this gap, the data assets it would need, the likely partners, and an order-of-magnitude cost. To be written by Stan Gilmour and Huw Williams rather than generated, since a proposed design is a professional judgement and not a finding of the review.

No system model, and no needs assessment method for commissioners

Gap 6

No system dynamics or microsimulation model has been applied to a brain injury and justice pathway, and no small-area estimation method exists for a commissioner wanting a local prevalence figure.

Why it matters. Without it, every local service is planned from a national average with a confidence interval sixteen points wide.

Authored content pending The study design that would close this gap, the data assets it would need, the likely partners, and an order-of-magnitude cost. To be written by Stan Gilmour and Huw Williams rather than generated, since a proposed design is a professional judgement and not a finding of the review.
Working with us on any of these Three of the six sit inside existing infrastructure at the University of Exeter. Two need a data controller willing to link health and justice records. If you hold one of those assets, or fund work of this kind, get in touch.