I don’t doubt the TBI could have a direct effect on suicide. The context of a TBI includes before and after factors. Before: Ideally, a child does not experience TBI. What went wrong in the lives of children whose brains are injured? Any relation to suicide rates? (Was the child on drugs for ADHD, ‘bipolar disorder’, etc, which affect blood pressure, sleep and alertness, and have their own separate roles in suicide rates?) After: What happens when a child has a TBI? Is treatment uniformly helpful? Are the parents adversely affected by financial or legal problems in the aftermath?