Evidence, adaptations
and limits.
What do we actually know about trauma-informed approaches and disability?
A summary of the research on trauma-informed care, trauma-focused treatment and disability-related risk, and where it runs out.
What this is: a plain summary of three kinds of evidence.
Why it matters: trauma-informed care and trauma-focused treatment are often confused.
The honest answer: limited evidence for trauma-informed care; strong general evidence for trauma-focused treatment; thin evidence for adaptations.
One thing to take away: keep the three kinds of evidence apart.
The short version
The case for trauma-informed approaches rests more on principle and on the high rates of trauma among people using services than on outcome trials. A 2023 systematic review of trauma-informed organisational change in primary and community mental health care found the evidence very limited and uncertain, with some promising signs, and a 2025 AHRQ review found the evidence insufficient to draw conclusions about client outcomes. Trauma-focused treatments for PTSD, by contrast, have a strong evidence base and are recommended by NICE, though evidence for adapted versions with disabled people, especially people with intellectual disabilities, is thin. The best-established disability-specific finding is about risk: disabled adults and children face higher rates of violence.
Four kinds of evidence
Trauma-informed services
Organisational and relational principles. Limited, uncertain outcome evidence.
PTSD treatments in particular disabled groups
Small trials and case series, for example in intellectual disability and spinal cord injury.
Specific adaptations
Rarely evaluated directly; mostly described in case reports and reviews.
Reasonable practice suggestions
Much of this branch: sensible, principled, and not directly tested. Labelled “Our framework”.
Separately, there is reasonably robust evidence that disabled adults and children face higher rates of violence, and strong general evidence for trauma-focused treatments for PTSD.
What the research shows
Research findingsTrauma-informed organisational change
Lewis and colleagues (2023) reviewed trauma-informed organisational change programmes in primary and community mental health care. They found the evidence very limited, conflicting and uncertain, with possible improvements in staff readiness, safety, patients’ access to services and some health outcomes.
Limits the authors note: no studies measured adverse events, harm, cost-effectiveness or staff health.
Trauma-informed care: a wider review
An AHRQ systematic review published in 2025 (Nguyen-Feng and colleagues) found 12 eligible studies, all at high risk of bias. Evidence was insufficient to draw conclusions about trauma-informed care for any client outcome in adult primary care or psychiatric hospital settings, or for children and young people in any setting. Models varied too much to pool. No studies collected data on harms.
What this means: it doesn’t show the principles are unhelpful; it limits what can be claimed about demonstrated outcomes. Research hasn’t kept pace with implementation.
Trauma-focused treatment
NICE’s 2018 guideline (NG116) recommends individual trauma-focused CBT and, in some circumstances, EMDR for adults with PTSD, based on its review of the trial evidence.
What it can’t tell us: how well these treatments work for disabled people, or which adaptations matter.
Intellectual disability
Mevissen-Renckens and de Jongh (2010) found only case reports of PTSD treatment for people with intellectual disabilities, suggesting positive effects, and no valid assessment tools. A 2024 review of EMDR (Schipper-Eindhoven and colleagues) found 13 mostly small studies, concluding EMDR is feasible and potentially effective with adaptations; its one randomised feasibility trial found improvement but no significant advantage over standard care.
Spinal cord injury
A small randomised trial (published in Rehabilitation Psychology, 2025) compared prolonged exposure with treatment as usual for 29 adults with PTSD after spinal cord injury, starting during acute rehabilitation. The main group-by-time result wasn’t statistically significant, though effect sizes favoured prolonged exposure on PTSD symptoms and several secondary outcomes. Only 25% completed treatment; completers were satisfied. The authors concluded that delivery during acute rehabilitation isn’t feasible for many people.
What it tells us: limited but relevant evidence; it doesn’t establish effectiveness across physical disabilities or validate particular adaptations.
Risk of violence
Hughes and colleagues (2012) found that disabled adults had higher odds of experiencing violence than non-disabled adults (pooled odds ratio 1.50), with considerable variation between studies; Jones and colleagues (2012) found disabled children had substantially higher odds of several types of violence (odds ratios roughly 2.9 to 4.6).
Limits: both reviews are over a decade old; study quality varied; populations and definitions differed; and few studies came from outside Europe and the USA.
Adaptations, in one place
Our framework- Apply the principles to the service’s own power. What “Trauma-Informed” Actually Means
- Safety first when harm is ongoing. When the Threat Is Ongoing
- Don’t assume trauma, or dismiss it. A Trauma Response, a Current Threat, or Both?
- Give information and choice by default. Not Repeating Harm in Services
- Offer trauma-focused treatment, adapted. Trauma-Focused Therapies and Disability
- Use the terms precisely. Trauma, PTSD and Complex PTSD
- Don’t read impairment as trauma. Disability Is Not a Trauma Symptom
- Help with the next appointment, not only the last. Medical and Procedural Trauma
- Make consent continuing and accessible. Consent, Choice and the Right to Stop
- Check every technique against the person’s body. Trauma-Informed Work in the Room
For every summary, ask whose outcomes were measured, and whether communication, access and consent were meaningfully addressed.
Limits to keep in mind
- A label isn’t a practice. “Trauma-informed” can be claimed without changing anything.
- Not everyone is traumatised. The approach shouldn’t become a lens that turns every disabled person into a trauma case.
- Principles can’t replace safety. If a service or carer is still causing harm, kindness in the therapy room isn’t enough.
- Survivor and disabled people’s leadership. Sweeney and Taggart argue survivor organisations should shape the agenda; disabled people’s organisations have a similar claim.
What needs attention here?
The person asks whether trauma-informed care ‘works’
Possible focus: an honest account of limited evidence
Watch for: overstating it
Trauma-focused treatment is being considered
Possible focus: the strong general evidence, and the gaps for disabled people
Watch for: assuming either exclusion or a standard protocol
A service is introducing trauma-informed training
Possible focus: whether practice and policy change
Watch for: training alone as the outcome
Possible starting points, agreed with the person, not rules.
Questions worth carrying, as a therapist
Therapist Reflection- Can I tell trauma-informed care, trauma-focused treatment and risk evidence apart?
- Am I overstating what is known?
- Are disabled people involved in shaping how our service applies this?
Evidence & sources
Sources checked in October 2026, using targeted searches rather than a systematic review. “We have not located” means our searches did not find it.
Lewis, N. et al. (2023), “Trauma-informed approaches in primary healthcare and community mental healthcare: A mixed methods systematic review of organisational change interventions”, Health & Social Care in the Community, 2023, article 4475114.
National Institute for Health and Care Excellence (2018), Post-traumatic stress disorder (NG116).
Mevissen-Renckens, E. H. M. & de Jongh, A. (2010), Clinical Psychology Review, 30(3), 308–316. doi:10.1016/j.cpr.2009.12.005
Hughes, K. et al. (2012), The Lancet, 379(9826), 1621–1629. doi:10.1016/S0140-6736(11)61851-5. Jones, L. et al. (2012), The Lancet, 380, 899–907.
SAMHSA (2014), SAMHSA’s Concept of Trauma and Guidance for a Trauma-Informed Approach. Sweeney, A. & Taggart, D. (2018), Journal of Mental Health, 27(5), 383–387. doi:10.1080/09638237.2018.1520973
Nguyen-Feng, V. N., Ramirez, M., Behrens, K. L., Usset, T., Claussen, A. M., Parikh, R. R., Lee, E. K., Mendenhall, T., Wilt, T. J. & Butler, M. (2025), Trauma Informed Care: A Systematic Review. Agency for Healthcare Research and Quality (AHRQ Publication No. 25-EHC007).
Schipper-Eindhoven, S., de Knegt, N. C., Mevissen, L., van Loon, J., de Vries, R., Zhuniq, M. & Bekker, M. H. J. (2024), “EMDR treatment for people with intellectual disabilities: A systematic review about difficulties and adaptations”, Frontiers in Psychiatry, 14, 1328310. doi:10.3389/fpsyt.2023.1328310
Prolonged exposure for posttraumatic stress disorder following spinal cord injury: A randomized controlled trial (2025), Rehabilitation Psychology, 70(3), 240–254. doi:10.1037/rep0000580
The reading of the evidence, the adaptations and the limits are this site’s synthesis.
Our searches (October 2026) did not find trials of trauma-informed care in services specifically for disabled people, or trials of trauma-focused treatment adapted for sensory impairments. Trials with physically disabled people are few; one is summarised above.
Last reviewed: October 2026.
How to cite this page: Donaghey, C. (2026). Evidence, Adaptations and Limits. Disability in Psychotherapy. Available at: https://disabilityinpsychotherapy.online/what-is-psychotherapy/trauma-informed-approaches/evidence-adaptations-and-limits/ (Accessed: [date]).
Shared under CC BY-NC 4.0, with an extra permission to teach from it on fee-paying courses. Credit the site. See Reusing This Material.