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Related Experiment Video

Updated: Sep 25, 2025

Burn Injury-Induced Pain and Depression-Like Behavior in Mice
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Complex pain phenotypes: Suicidal ideation and attempt through latent multimorbidity.

Kangwon Song1, Ben J Brintz2, Chen-Pin Wang3

  • 1Department of Pharmacy, AU Medical Center, Augusta University, Augusta, GA, United States of America.

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Chronic pain and mild traumatic brain injury increase suicide risk, but this link is explained by underlying health conditions, not pain types alone. Managing comorbidities is key for prevention.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Epidemiology

Background:

  • Chronic pain and mild traumatic brain injury (mTBI) are linked to high rates of suicidal ideation and attempts.
  • Understanding factors contributing to suicide risk in this population is crucial for effective prevention strategies.
  • Previous research has not explored the connection between specific pain phenotypes and suicide-related behaviors in mTBI patients.

Purpose of the Study:

  • To investigate whether distinct pain phenotypes are independently associated with suicidal ideation or attempts in veterans with mTBI.
  • To determine if comorbidities within these pain phenotypes, rather than the phenotypes themselves, explain the observed association with suicide-related behaviors.

Main Methods:

  • A longitudinal retrospective cohort study analyzed data from Post-9/11 Veterans with mTBI receiving VA care.
  • Pain phenotypes were previously identified using latent variable models of pain scores and treatment.
  • Counterfactual causal modeling assessed the predictive relationship between pain phenotypes and suicide ideation/attempts, controlling for comorbidities.

Main Results:

  • Initially, pain phenotypes significantly predicted suicide-related behaviors.
  • After adjusting for comorbidities using propensity scores, this significant association between pain phenotypes and suicide-related behaviors disappeared.

Conclusions:

  • Suicidal ideation and attempts in individuals with chronic pain and mTBI appear to be primarily mediated by underlying multimorbidity.
  • Identifying and managing comorbidities such as depression and PTSD is critical for suicide prevention in this vulnerable group.
  • Effective management of chronic pain and mTBI should prioritize addressing associated health conditions to mitigate suicide risk.