Impulsivity and Psychiatric Diagnoses as Mediators of Suicidal Ideation and Suicide Attempts Among Veterans With Traumatic Brain Injury.

IF 2.4 4区 医学 Q2 CLINICAL NEUROLOGY Journal of Neuropsychiatry and Clinical Neurosciences Pub Date : 2024-01-01 Epub Date: 2024-01-09 DOI:10.1176/appi.neuropsych.20230044
Alexandra L Aaronson, Bridget Smith, Kelly Krese, Meghan Barnhart, Maheen Adamson, Harriet de Wit, Noah S Philip, Lisa A Brenner, Theresa Bender-Pape, Amy A Herrold
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Abstract

Objective: Traumatic brain injury (TBI) is a risk factor for suicide, but questions related to mechanisms remain unanswered. Impulsivity is a risk factor for suicide and is a common sequela of TBI. The authors explored the relationships between TBI and both suicidal ideation and suicide attempts and explored whether impulsivity and comorbid psychiatric diagnoses mediate these relationships.

Methods: This cross-sectional retrospective chart review study included 164 veterans enrolled in a previous study. Sixty-nine veterans had no TBI history, and 95 had a TBI history (mild, N=44; moderate, N=13; severe, N=12; and unclear severity, N=26). To examine the associations between TBI and suicidal ideation or suicide attempts, as well as potential mediators of these relationships, chi-square tests, t tests, and logistic regression models were used.

Results: Unadjusted analyses indicated that veterans with TBI were more likely to report suicidal ideation; however, in analyses controlling for mediators, this relationship was no longer significant. Among veterans with TBI, suicidal ideation was related most strongly to high impulsivity (odds ratio=15.35, 95% CI=2.43-96.79), followed by depression (odds ratio=5.73, 95% CI=2.53-12.99) and posttraumatic stress disorder (odds ratio=2.57, 95% CI=1.03-6.42). TBI was not related to suicide attempts, yet suicide attempts were related to high impulsivity (odds ratio=6.95, 95% CI=1.24-38.75) and depression (odds ratio=3.89, 95% CI=1.56-9.40).

Conclusions: These findings suggest that impulsivity, followed by psychiatric diagnoses, most strongly mediate the relationships between TBI and both suicidal ideation and suicide attempts. Impulsivity may be mechanistically related to, and serve as a future treatment target for, suicidality among veterans with TBI.

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冲动和精神病诊断是脑外伤退伍军人自杀意念和自杀企图的中介因素。
推特负性急迫冲动介导了创伤性脑损伤与自杀意念之间的关系,揭示了自杀倾向的治疗目标。
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来源期刊
CiteScore
5.30
自引率
3.40%
发文量
67
审稿时长
6-12 weeks
期刊介绍: As the official Journal of the American Neuropsychiatric Association, the premier North American organization of clinicians, scientists, and educators specializing in behavioral neurology & neuropsychiatry, neuropsychology, and the clinical neurosciences, the Journal of Neuropsychiatry and Clinical Neurosciences (JNCN) aims to publish works that advance the science of brain-behavior relationships, the care of persons and families affected by neurodevelopmental, acquired neurological, and neurodegenerative conditions, and education and training in behavioral neurology & neuropsychiatry. JNCN publishes peer-reviewed articles on the cognitive, emotional, and behavioral manifestations of neurological conditions, the structural and functional neuroanatomy of idiopathic psychiatric disorders, and the clinical and educational applications and public health implications of scientific advances in these areas. The Journal features systematic reviews and meta-analyses, narrative reviews, original research articles, scholarly considerations of treatment and educational challenges in behavioral neurology & neuropsychiatry, analyses and commentaries on advances and emerging trends in the field, international perspectives on neuropsychiatry, opinions and introspections, case reports that inform on the structural and functional bases of neuropsychiatric conditions, and classic pieces from the field’s rich history.
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