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I found something interesting relating to discharges from the armed services.
Compared with the total discharge population, discharge due to alcohol or drug abuse was more frequent in those with moderate TBI (odds ratio [OR], 5.4; 95% confidence interval [CI], 1.7–16.9) and those with mild TBI (OR, 2.6; 95% CI, 1.6–4.3) but not in those with severe TBI. Discharge due to behavior was no different in those with moderate or severe TBI and 1.8 times greater in those with mild TBI (95% CI, 1.4–2.2). Discharge due to criminal conviction was 2.7 times higher in those with mild TBI (95% CI, 1.9–3.9) and no different in those with moderate or severe TBI. Discharge due to medical disability was 7.5 times higher in those with mild TBI (95% CI, 6.0–9.3), 25.2 times higher in those with moderate TBI (95% CI, 16.2–39.2), and 40.4 times higher in those with severe TBI (95% CI, 30.0–54.4). The authors note, however, that because the risk of medical discharge is directly related to the severity of the injury, these individuals may be receiving medical discharges rather than other types of discharges (such as behavioral). A limitation of the study is that it did not take into account pre-existing factors, such as aggressive tendencies or preinjury alcohol abuse, which may have played a role in discharge outcome.
Seems that mild TBI was part of the picture in higher rates of discharge for alcohol/drug abuse, behavior, criminal conviction, as well as medical issues.
Initially, a traumatic brain injury may seem mild, but long-term, it’s much more than that.