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Co‐twin control study of relationships among combat exposure, combat‐related PTSD, and other mental disorders
Abstract
The well-documented association between combat-related PTSD (C-PTSD) and other mental disorders may be an artifact of shared familial vulnerability. This study uses a co-twin control design to examine whether the association between C-PTSD and other mental disorders persists after adjusting for shared familial vulnerability. Data were from male monozygotic twin pairs in the Vietnam Era Twin Registry. Logistic regression analyses demonstrated that combat exposure, adjusted for C-PTSD, was significantly associated with increased risk for alcohol and cannabis dependence and that C-PTSD mediated the association between combat exposure and both major depression and tobacco dependence. We conclude C-PTSD comorbidity persists after controlling for shared vulnerability. Combat exposure is directly and indirectly, through C-PTSD, associated with increased risk for other mental disorders.
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The current study's null findings for other traumatic SLEs are not in accordance with previous genetically informative studies that found increased depression risk associated with combat exposure and somatic illness/injury.
“This is not in accordance with results from previous genetically informative studies, which have found increased depression risk associated with combat exposure (Koenen et al., 2003) and somatic illness and injury (Kendler et al., 1999a).”
From Stressful life events increase the risk of major depressive episodes: A population-based twin study (2023) · cites this paper as Koenen et al., 2003
Previous genetically informative studies have found increased depression risk associated with combat exposure and somatic illness/injury.
“previous genetically informative studies, which have found increased depression risk associated with combat exposure (Koenen et al., 2003) and somatic illness and injury (Kendler et al., 1999a).”
From Stressful life events increase the risk of major depressive episodes: A population-based twin study (2023) · cites this paper as Koenen et al., 2003
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Metadata
- Authors
- Koenen, K. C., Lyons, M. J., Goldberg, J., Simpson, J., Williams, W. M., Toomey, R., Eisen, S. A., True, W., & Tsuang, M. T.
- Affiliations
- Boston University (US)
- University of Washington (US)
- Harvard University (US)
- Washington University in St. Louis (US)
- St. Louis VA Medical Center (US)
- Corresponding author
- Koenen, Karestan C.
- ORCID
- Venue
- Journal of Traumatic Stress
- Publisher
- Wiley
- Published
- 2003-10
- Volume
- 16
- Issue
- 5
- Pages
- 433-438
- ISSN
- 0894-9867 (ISSN-L)
- 1573-6598
- OpenAlex
- W2100365790
- Cited by
- 88
- References
- 0
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 2 · 2022: 5 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 6 · 2017: 4 · 2016: 4 · 2015: 5 · 2014: 7 · 2013: 7 · 2012: 2
- FWCI
- 3.22
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Traumatic Stress (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (5r01aa010339-03)
- Centers for Disease Control and Prevention
- National Institute on Alcohol Abuse and Alcoholism (R01AA010586, AA-10339, AA10586)
- National Institute of Mental Health (MH11954-01, F31MH011954)
- National Institute on Drug Abuse (R01DA004604, DA-04604)
- Topics
- Social Sciences › Psychology › Clinical Psychology › Posttraumatic Stress Disorder Research
- Social Sciences › Psychology › Clinical Psychology › Migration, Health and Trauma
- Social Sciences › Psychology › Clinical Psychology › Child Abuse and Trauma
- Keywords
- combat-related PTSD, combat exposure, alcoholism, cannabis use disorder, major depressive disorder, tobacco dependence, Vietnam Era Twin Registry, monozygotic twins, mediation
- MeSH terms
- Adult, Alcohol Drinking, Mental Disorders, Marijuana Abuse, Humans, Male, Middle Aged, Military Personnel, Risk Factors, Stress Disorders, Post-Traumatic, Warfare, Comorbidity, Odds Ratio
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