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Post-Traumatic Stress Disorder (PTSD)
Expert Psychiatric Assessment
One of the most frequently assessed psychiatric conditions in personal injury litigation. Our specialist psychiatrists provide comprehensive PTSD evaluation using gold-standard CAPS-5 assessment, delivering expert witness reports prepared in accordance with Civil Procedure Rules Part 35 where required.
Understanding Post-Traumatic Stress Disorder
What Is PTSD?
Post-Traumatic Stress Disorder (PTSD) is a psychiatric condition that develops following exposure to a traumatic event involving actual or threatened death, serious injury, or sexual violence. Classified under DSM-5 (309.81) and ICD-11 (6B40), PTSD is characterised by four symptom clusters: intrusive re-experiencing, avoidance, negative alterations in cognition and mood, and marked changes in arousal and reactivity.
PTSD is the most commonly assessed psychiatric condition in medico-legal practice. Expert psychiatric evidence is frequently required to establish diagnosis, causation, prognosis, and functional impact across personal injury, criminal, family, employment, and immigration proceedings.
Diagnostic Criteria (DSM-5)
PTSD diagnosis requires symptoms across four clusters, persisting for more than one month and causing clinically significant distress or functional impairment:
Intrusion Symptoms
- Recurrent, involuntary, intrusive distressing memories
- Distressing dreams or nightmares related to the trauma
- Dissociative reactions (flashbacks)
- Intense psychological distress at trauma reminders
- Marked physiological reactions to reminders
Avoidance
- Avoidance of distressing memories, thoughts, or feelings
- Avoidance of external reminders (people, places, situations)
Negative Alterations in Cognition and Mood
- Inability to remember important aspects of the trauma
- Persistent negative beliefs about oneself or the world
- Distorted cognitions leading to self-blame
- Persistent negative emotional state
- Diminished interest in activities
- Feelings of detachment from others
- Inability to experience positive emotions
Alterations in Arousal and Reactivity
- Irritable behaviour and angry outbursts
- Reckless or self-destructive behaviour
- Hypervigilance
- Exaggerated startle response
- Concentration difficulties
- Sleep disturbance
Specifiers: With dissociative symptoms | With delayed expression (6+ months)
Prevalence
PTSD is estimated to affect approximately 3–4% of the UK adult population at any time, with lifetime prevalence reported in the range of 7–8%, depending on methodology. Women are twice as likely as men to develop PTSD. Common causes in medico-legal contexts include road traffic accidents, workplace injuries, assault, military service, historic abuse, and clinical negligence.
PTSD in Legal Proceedings
PTSD is the most frequently instructed psychiatric condition across all areas of legal practice. Courts frequently require independent expert evidence addressing issues that may not be determinable from GP records alone:
The distinction between PTSD and adjustment disorder directly affects damages quantification — making accurate expert diagnosis essential.
Legal Areas Requiring PTSD Assessment
Personal Injury
PTSD, adjustment disorder — causation, prognosis, damages quantification
Criminal Proceedings
Defendant mitigation, complainant impact, fitness to plead, automatism
Family & Child
Parenting capacity, attachment disorders, domestic abuse trauma
Clinical Negligence
Trauma from treatment errors, misdiagnosis, surgical harm, birth trauma
Employment & Workplace
Workplace trauma, harassment, occupational stress, fitness to work
Immigration & Asylum
Torture, trafficking, persecution — Istanbul Protocol reports
CICA Claims
Criminal injury — assault, violent crime, childhood abuse
Military & Armed Forces
Service-related PTSD, AFCS, war pensions
Inquests & Inquiries
Death-related trauma, Article 2 inquests, family impact
Prison Law & Parole
PTSD in custody, parole board risk assessment
Housing & Public Law
Trauma history in housing and community care assessments
Insurance Claims
Income protection, critical illness, travel claims
Our Assessment Approach
How We Assess
- Comprehensive clinical interview (90-120 minutes)
- Validated tools: CAPS-5, PCL-5, IES-R, PHQ-9, GAD-7
- Detailed trauma history & index event exploration
- Medical records & collateral info review
- Functional impact assessment across domains
- Symptom validity & differential diagnosis
- CPR Part 35 compliant expert report
Expert Selection
- Adult General Psychiatrist: PTSD, adjustment disorder, acute stress — most PI and employment cases
- Trauma Specialist: Complex PTSD, treatment-resistant presentations, dissociative features
- Forensic Psychiatrist: Criminal proceedings, risk assessment, complainant/defendant
- Child & Adolescent: Childhood PTSD, family proceedings, abuse cases
- Clinical Psychologist: Psychometric testing, therapy suitability assessment
Why Instruct Psychiatry Experts?
1,500+ Expert Panel
Access to the UK’s largest panel of consultant psychiatrists and psychologists with PTSD expertise.
CVs & Quotes in 1 Hour
Rapid response to instruction enquiries with expert CVs and fee estimates.
Urgent Reports (1–4 Days)
Expedited turnaround for court deadlines and urgent cases.
Validated Assessment Tools
CAPS-5, PCL-5, ITQ, and other gold-standard diagnostic instruments.
Nationwide & Remote
Face-to-face appointments across the UK plus remote video assessments.
CPR Part 35 Compliant
Reports prepared for court proceedings are drafted in accordance with Civil Procedure Rules Part 35 where applicable and include the required expert declaration and statement of truth.
Frequently Asked Questions
Instruct a PTSD Expert Witness Today
CVs and quotes in 1 hour. Urgent reports in 1-4 days. Section 12 approved psychiatrists with extensive PTSD assessment and court experience.