26 peer-reviewed studies linked to PTSD (diagnostic code 9411), from PubMed and the U.S. National Library of Medicine. Each citation links to its source.
Meta-analysis
Studying the Prevalence of PTSD in Veterans, Combatants and Freed Soldiers of Iran-Iraq War.Psychology, health & medicine · 2023
- Pooled prevalence of PTSD in combatants ~38 percent.
- Prevalence in freed POWs substantially higher.
- Time since exposure did not reduce prevalence: chronic course.
Supports chronicity of combat PTSD; relevant for service connection and TDIU.
View on PubMed ↗Systematic review
Psychological and pharmacological interventions for PTSD and comorbid mental health problems following complex traumatic events.PLoS medicine · 2020
- Multicomponent psychological interventions (TF-CBT, EMDR) reduced PTSD symptoms with moderate-to-large effect sizes.
- Combined treatments addressing comorbid depression and anxiety produced additional benefit in complex PTSD.
- Pharmacotherapy alone produced smaller effects than psychotherapy.
Supports that combat veterans with comorbid depression and anxiety warrant multicomponent treatment.
View on PubMed ↗Cohort study
Combat-Related PTSD and Comorbid Major Depression in U.S. Veterans: The Role of Deployment Cycle Adversity and Social Support.Journal of traumatic stress · 2020
- Comorbid major depression occurred in over half of U.S. veterans with combat-related PTSD.
- Higher deployment cycle adversity predicted greater comorbid depression severity.
- Lower post-deployment social support was independently associated with PTSD-MDD comorbidity.
Strong evidence supporting secondary service connection of MDD to combat PTSD.
View on PubMed ↗Meta-analysis
Epigenome-wide meta-analysis of PTSD across 10 military and civilian cohorts identifies methylation changes in AHRR.Nature communications · 2020
- DNA methylation changes in AHRR gene associated with PTSD across 10 cohorts.
- Biological signature of PTSD persists across trauma type and cohort.
- Epigenetic markers may serve as future biomarkers.
Provides biological evidence supporting legitimacy of the diagnosis in disability adjudication.
View on PubMed ↗Review
The Efficacy of Cognitive Processing Therapy for PTSD Related to Military Sexual Trauma in Veterans: A Review.Journal of evidence-based social work · 2019
- CPT demonstrates significant efficacy for PTSD secondary to MST.
- Veterans receiving CPT show clinically meaningful symptom reduction.
- Gender-sensitive delivery improves engagement and outcomes.
Supports MST-related PTSD as service-connected with established treatment.
View on PubMed ↗Meta-analysis
Benzodiazepines for PTSD: A Systematic Review and Meta-Analysis.Journal of psychiatric practice · 2015
- Benzodiazepines are ineffective for PTSD treatment and may worsen outcomes.
- Benzodiazepine use was associated with increased aggression, depression, and substance misuse in veterans with PTSD.
- Evidence supports avoiding benzodiazepines in PTSD; trauma-focused psychotherapy and SSRIs remain first-line.
Supports argument that veterans on benzodiazepines may have inadequately treated PTSD.
View on PubMed ↗Meta-analysis
Meta-analysis of the efficacy of treatments for posttraumatic stress disorder.The Journal of clinical psychiatry · 2013
- Psychotherapy (notably trauma-focused CBT and EMDR) produced large effect sizes for PTSD symptom reduction.
- SSRIs and SNRIs produced moderate effects; risperidone, topiramate, and venlafaxine had supportive evidence.
- Benzodiazepines lacked evidence of benefit and are not recommended for PTSD.
Foundational evidence supporting service-connected PTSD treatment efficacy.
View on PubMed ↗Review
Review: managing PTSD in combat veterans with comorbid traumatic brain injury.Journal of rehabilitation research and development · 2012
- PTSD-TBI comorbidity highly prevalent in OEF/OIF veterans; complicates treatment.
- Symptom overlap between PTSD and post-concussive syndrome can confound diagnosis.
- Integrated multidisciplinary care improves outcomes.
Supports secondary service connection of PTSD to documented TBI events.
View on PubMed ↗Systematic review
Prevalence estimates of combat-related post-traumatic stress disorder: critical review.The Australian and New Zealand journal of psychiatry · 2010
- Lifetime PTSD prevalence among Vietnam veterans 10-30 percent depending on methodology.
- Current PTSD prevalence in OEF/OIF veterans 4-17 percent.
- Higher combat exposure consistently correlated with elevated PTSD risk.
Authoritative prevalence data supporting combat-related PTSD as service-connected.
View on PubMed ↗Meta-analysis
Post-traumatic stress disorder, attention deficit and hyperactivity disorder, and 24 gastrointestinal diseases: Evidence from Mendelian randomization analysisMedicine (Baltimore) · 2025
- Causal effect of PTSD on GERD demonstrated via MR
- PTSD increases risk of multiple GI conditions including GERD and IBS
- Robust to sensitivity analyses
Strengthens causal argument for PTSD-secondary GERD
View on PubMed ↗Case-control
Posttraumatic Stress Disorder and Obstructive Sleep Apnea in Twins.JAMA Network Open · 2024
- Vietnam Era Twin Registry to test PTSD-OSA association controlling for shared genetics and early environment
- PTSD severity associated with higher OSA prevalence within twin pairs
- Causal interpretation: PTSD increases OSA risk independent of familial confounders
Strongest available evidence for secondary service connection of OSA to PTSD
View on PubMed ↗Cohort study
Comorbidity Profiles of Posttraumatic Stress Disorder Across the Medical PhenomeBiological Psychiatry Global Open Science · 2024
- GERD ranks among most strongly elevated comorbidities in PTSD
- Cross-system comorbidity confirmed across multiple EHR networks
- Effect persists after demographic adjustment
Population-level support for PTSD-secondary GERD claims
View on PubMed ↗Cohort study
Assessment of Post-traumatic Stress Disorder Among Objective Esophageal Motility and Reflux Phenotypes in Symptomatic VeteransJournal of Clinical Psychology in Medical Settings · 2023
- PTSD significantly associated with functional esophageal disorders in veterans
- Veterans with PTSD more likely to have reflux hypersensitivity and functional heartburn than true GERD
- Symptom severity overlapped between true GERD and functional phenotypes with PTSD
Supports service connection linkage between PTSD and GERD-spectrum esophageal disease
View on PubMed ↗Cross-sectional
Initial assessment of medical post-traumatic stress among patients with chronic esophageal diseasesNeurogastroenterology and Motility · 2023
- Medical PTSD symptoms prevalent in chronic esophageal disease including GERD
- Esophageal symptom flares correlate with traumatic stress responses
- Bidirectional mind-gut relationship documented
Peer-reviewed nexus between trauma-related stress and chronic GERD
View on PubMed ↗Meta-analysis
Investigating the shared genetic architecture of post-traumatic stress disorder and gastrointestinal tract disorders: a genome-wide cross-trait analysisPsychological Medicine · 2023
- Significant shared genetic architecture between PTSD and GERD
- Mendelian randomization supports causal effect of PTSD on GERD risk
- Shared loci identified across PTSD and multiple GI disorders
Provides biological mechanism for PTSD-GERD secondary service connection
View on PubMed ↗Cross-sectional
Self-reported gastrointestinal disorders among veterans with Gulf War illness with and without posttraumatic stress disorderNeurogastroenterology and Motility · 2023
- IBS more prevalent in Gulf War veterans with PTSD vs without
- GWI plus PTSD multiplicatively increases GI burden
- Functional dyspepsia also elevated
Direct support for PTSD-secondary IBS in Gulf War veterans
View on PubMed ↗Review
Male Sexual Health Related Complications Among Combat VeteransSexual Medicine Reviews · 2022
- Contemporary review of ED and related complications in combat veterans
- Multiple mechanisms documented
- Comprehensive overview of veteran-specific issues
Comprehensive overview for ED claims and ratings.
View on PubMed ↗Meta-analysis
The global prevalence of depression, suicide ideation, and attempts in the military forces: a systematic review and Meta-analysis.BMC psychiatry · 2021
- Pooled global prevalence of depression in military forces ~23 percent.
- Pooled prevalence of suicidal ideation ~11 percent.
- Combat exposure and deployment were significant predictors.
Globally representative evidence supporting MDD service connection.
View on PubMed ↗Systematic review
Relationship Between Posttraumatic Stress Disorder and Sexual Difficulties: A Systematic Review of Veterans and Military PersonnelThe Journal of Sexual Medicine · 2021
- Comprehensive systematic review of PTSD-sexual dysfunction link
- Consistent association across studies
- Mechanisms include both psychological and pharmacological factors
Highest-tier evidence for secondary service-connection of ED to PTSD.
View on PubMed ↗Cohort study
Posttraumatic stress disorder and the risk of erectile dysfunction: a nationwide cohort study in TaiwanAnnals of General Psychiatry · 2021
- Large nationwide cohort confirms PTSD as independent risk factor for ED
- Effect persists after adjusting for confounders
- International corroboration of US findings
Corroborating international epidemiological evidence for PTSD-secondary ED.
View on PubMed ↗Cohort study
Risk factors for upper and lower functional gastrointestinal disorders in Persian Gulf War Veterans during and post-deploymentNeurogastroenterology and Motility · 2019
- Deployment-related stress, GI infection, and PTSD independently increased IBS risk
- Post-infectious IBS pattern documented
- Risk persists years post-deployment
Establishes deployment as risk factor for IBS
View on PubMed ↗Meta-analysis
Prevalence of Mental Health Disorders in Elderly U.S. Military Veterans: A Meta-Analysis and Systematic Review.The American journal of geriatric psychiatry · 2018
- Pooled prevalence of major depression in elderly U.S. veterans ~11 percent.
- GAD prevalence in elderly veterans ~5 percent.
- PTSD prevalence ~7 percent, higher in combat veterans.
Authoritative prevalence baseline for service-connected MDD/GAD/PTSD in older veterans.
View on PubMed ↗Systematic review
Systematic Review of Sexual Dysfunction Among Veterans with Post-Traumatic Stress DisorderSexual Medicine Reviews · 2015
- Earlier systematic review establishing PTSD-sexual dysfunction connection in veterans
- Multiple sexual dysfunction subtypes documented
- Treatment implications outlined
Historical evidence supporting secondary claims.
View on PubMed ↗Cohort study
Sexual dysfunction in male Iraq and Afghanistan war veterans: association with posttraumatic stress disorder and other combat-related mental health disorders: a population-based cohort studyThe Journal of Sexual Medicine · 2014
- Population-based cohort linking PTSD and combat mental health disorders to ED in OEF/OIF veterans
- Strong dose-response with PTSD severity
- Other mental health disorders also associated
Primary source for secondary service-connection of ED to PTSD.
View on PubMed ↗Cross-sectional
Post-traumatic stress disorder, depression, and aggression in OEF/OIF veterans.Military medicine · 2013
- OEF/OIF veterans with PTSD had significantly higher rates of comorbid major depression.
- Combined PTSD and depression were associated with elevated aggression and impulsivity.
- Comorbid presentations predicted greater functional impairment.
Supports secondary service connection of MDD to PTSD in post-9/11 veterans.
View on PubMed ↗Cross-sectional
Deployment-related TBI, persistent postconcussive symptoms, PTSD, and depression in OEF/OIF veterans.Rehabilitation psychology · 2011
- Deployment-related TBI significantly associated with persistent post-concussive symptoms, PTSD, and depression.
- Veterans with TBI had ~2x or greater risk of meeting criteria for major depression.
- PTSD partially mediated the TBI-depression relationship.
Supports secondary service connection of depression to in-service TBI.
View on PubMed ↗