According to the CDC, suicide is the second-leading cause of death among teens between the ages of 15 and 19 — and new research suggests that suffering a concussion could put an already vulnerable population further at risk.

New research, published in the Journal of Affective Disorders, appears to link concussions with risk factors for suicide completion. The Psychiatry & Behavioral Health Learning Network, which examined the study, reports that among 13,000 U.S. high school students, those who self-reported having had a concussion — about 15 percent of those surveyed — were more likely to report symptoms linked to suicide.

Respondents who reported having a concussion within the past year were more likely to say they felt feelings of depression, or to have had suicidal ideation. They were also more likely to have planned or previous suicide attempts.

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