How do age and preinjury health influence prognosis after TBI?

• A. Older age and poorer preinjury health predict worse outcomes.
• B. Age and preinjury health have no effect on prognosis.
• C. Older age improves prognosis.
• D. They only affect seizure risk.

Answer: (A)

Age and preinjury health influence prognosis after traumatic brain injury. With increasing age, the brain has less plasticity and reserve, and older individuals often have more medical comorbidities and frailty, which raise the risk of complications during recovery and hinder rehabilitation. Poorer preinjury health—such as cardiovascular disease, diabetes, prior brain events, cognitive impairment, or general frailty—reduces physiological reserve and the body's ability to recover, making it harder to regain function. Together, these factors are associated with higher mortality, greater long-term disability, and slower, less complete cognitive and functional recovery.

That’s why the best answer is that older age and poorer preinjury health predict worse outcomes. The idea that age or health has no effect is not supported by evidence, and the notion that age would improve prognosis contradicts observed recovery patterns. Prognosis after TBI is broader than seizure risk and includes overall functional, cognitive, and independence outcomes.