Peter J. Na, MD, MPH

Department of Psychiatry, Yale School of Medicine, New Haven, Connecticut; VA Connecticut Healthcare System, West Haven, Connecticut

JCP
A Growing Epidemic of Loneliness among US Military Veterans
Brief Report

August 3, 2026

The prevalence of frequent loneliness increased significantly compared with 2019–2020 estimates. Frequently lonely veterans had significantly greater odds of 6 of 8 psychiatric disorders, such as depression and PTSD.
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PCC
Cardiovascular Disease and PTSD in Older Veterans
Original Research

July 14, 2026

Older veterans with comorbid CVD and PTSD have a markedly elevated burden of health and functional difficulties, underscoring the importance of integrated, trauma-informed care to improve outcomes in this...
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JCP
National Trends in PTSD among US Military Veterans
Original Research

May 25, 2026

Compared with 2019–2020, past-month PTSD prevalence was higher among men, White and racial/ethnic minority veterans, and veterans aged 18–59 years
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JCP
Dissociative Subtype of PTSD in US Military Veterans
Brief Report

February 4, 2026

Of 169 veterans who screened positive for past-month PTSD, 87 screened positive for the dissociative subtype of PTSD.
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JCP
Identifying Factors Linked to PTSD Among Younger US Military Veterans
Original Research

September 17, 2025

Younger veterans were 3 times more likely to screen positive for PTSD compared to older veterans, with psychosocial difficulties contributing most to this association.
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JCP
Psychosocial Correlates of Optimism among US Military Veterans
Brief Report

April 21, 2025

Positive psychosocial characteristics (PPCs) such as curiosity, perceived resilience, and purpose in life were strongly linked to optimism scores, suggesting a role for interventions that target other PPCs in...
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JCP
Sex Differences in PTSD among US Military Veterans
Brief Report

December 16, 2024

Sex differences in PTSD were attributable to differential exposure to traumatic events such as childhood sexual assault and military sexual trauma and to social factors such as greater loneliness.
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JCP
Prevalence, Correlates, and Burden of Subthreshold PTSD in US Veterans
Original Research

October 23, 2024

Subthreshold PTSD affects 3.5% of US military veterans and is associated with increased rates of psychiatric disorders, suicidal thoughts and behaviors, and functional difficulties.
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PCC
Functional Disability in US Military Veterans
Original Research

July 4, 2023

Improved identification and integrated clinical management of sociodemographic, military, and health risk factors may help mitigate disability risk and promote the maintenance of functional capacity in US veterans.
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JCP
Association of Distress Due to Systemic Racism and Racial Disparities With Psychopathology and Suicidal Ideation Among Veterans During COVID-19
Brief Report

August 1, 2022

Data from the National Health and Resilience in Veterans Study shed light on the intersection of systemic racism and the COVID-19 pandemic.
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JCP
PTSD Symptoms and GrimAge, an Epigenetic Marker of Mortality Risk, in Veterans
Brief Report

July 6, 2022

This study investigated whether PTSD and other medical and psychiatric conditions were linked to GrimAge, a measure of epigenetic aging, in a large sample of male US veterans.
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JCP
Factors Associated With Remission of Suicidal Ideation in Veterans During COVID-19
Brief Report

June 27, 2022

This study compared veterans with and without remission of suicidal ideation during the pandemic on pre- and peri-pandemic clinical and psychosocial characteristics.
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