A new study published in Neurology indicates that head injuries substantially increase a person’s risk of suicide, with those who sustain a head injury 21% more likely to attempt suicide than those without such an injury.
Researchers analyzed records for more than 1.8 million adults in the United Kingdom across two decades, comparing nearly 390,000 people with a head injury to about 1.5 million who had no head injury. The rate of suicide among people with head injuries was 2.4 per 1,000 person-years, compared to 1.6 per 1,000 person-years among the uninjured. The study found that the risk of suicide was highest within 12 months of a head injury, though the risk remained higher compared to those without head injuries even after that period, declining over time.
Notably, the study did not find a significant increase in deaths by suicide, suggesting that head injuries might contribute to more non-fatal suicide attempts. According to Nicola Adderley, lead researcher and professor of epidemiology at the University of Birmingham, the impact of head injuries extends beyond physical symptoms. “Our findings show that the impact of head injuries are not limited to just physical symptoms or repercussions. They can have profound psychological consequences,” she said.
An accompanying editorial by Erin Bigler, retired professor of psychology and neuroscience at Brigham Young University, suggests the link involves damage to the brain’s “cone of vulnerability”—brain structures critical for emotional regulation and decision-making. Such damage may produce impulsivity, disinhibition, and impaired judgment, lowering the threshold for self-harm. Researchers recommend that suicide risk assessments be considered for anyone with a recent head injury, regardless of their mental health history, and highlight the urgent need for targeted mental health and well-being support during recovery.
This article is an AI-assisted summary. All facts and figures are drawn from the original report: https://www.ttownmedia.com/lifestyles/health/head-injuries-linked-to-suicide-risk-researchers-say/article_a5450ced-d4b8-5a5d-94bd-dfef42be947a.html