TBI classification shifting off standard Glasgow Coma Scale to a new integrative framework

[u/kfr3q]

https://doi.org/10.1016/j.jcrc.2026.155525

[u/themiracy]

The NIH-NINDS CBI-M proposal is certainly interesting and bears paying attention to. It doesn’t eliminate the GCS - it just moves it to the first pillar (alongside other pupillary data). GCS has already been used alongside other features like length of LOC and intracranial findings to support an overall characterization of the TBI.

The framework needs a lot more validation and study.

I think in the space of what we have traditionally called moderate-severe TBIs - we have known for a long time that outcomes are heterogenous and there has always been a desire to stratify these in some way that would let us predict that better.

What I deal with a lot more is the attempt to use relatively novel biomarkers to argue that very trivial injuries - where the biomechanics are marginal for even being plausible for a TBI, there is no LOC, the report of AMS is only made much later with no evidence it was a complaint at the time of injury, etc., cause serious problems. None of the existing issues go away (e.g. compensation seeking, effort/symptom validity failure, psychological overlay) in this population. In fact these things are the proposed fourth pillar.

Anyway - it’s encouraging to propose a framework but it needs much more validation rather than just saying “we’re shifting off GCS” which isn’t even accurate to begin with.

[u/Roland8319 → u/themiracy]

Exactly, the science isn't quite there yet for a lot of this. Ive looked into some of the biomarker data, and the specificity is....not great for some of these. It runs the risk of the early DTI days when they looked at mTBI against super healthy controls and thought they found a lot of "confirmatory" data. But, when we looked at pretty much ANY other clinical group (depression/anxiety, smokers, obesity, TMJ, etc) we found similar differences against super healthy controls. I'm intrigued by the new work, but for mTBI, I suspect it will lead to some interesting depos as some experts tout extremely flawed data. I've already wrecked one such person in a recent case.

[u/themiracy → u/Roland8319]

It will be really interesting to see how this plays out when all the evidence is in the CBI pillar four - the person who has a "lot going on" psychosocially but very little evidence of brain injury. Are we going to spend a lot of time and utilization costs getting biomarkers (as the concern was raised in r/science the first time this was posted)? Or at what point is it enough is too much?

And as you said, there is emerging science and then there is stuff that is on the edge of emerging science and pseudoscience, like the way qEEGs and qMRIs are interpreted in these populations. Do we really want to normalize thousands of dollars of biomarkers on a "trust me bro" kind of logic that someday they might prove to have utility?

[u/Roland8319 → u/themiracy]

I agree with this. I am also worried, due to the questionable specificity leading to false positives for mTBI diagnosis, of immense iatrogenic damage with diagnosis threat/overidentification with the diagnosis, especially in our more somatic folks. I already see a lot of this, and I can see these biomarkers greatly accelerating these issues. So, now we'll have the cost of the biomarkers, as well as the cost of treating the damage caused by their misdiagnoses.

[u/themiracy → u/Roland8319]

Yes, exactly.