Traumatic Brain Injury and Genetic Risk for Alzheimer's Disease Impact Cerebrospinal Fluid β-Amyloid Levels in Vietnam War Veterans.

When considering TBI severity (no-TBI, mild TBI, moderate/severe TBI), the ANCOVA model showed that the interaction between TBI severity and PRS was marginally significant in the expected direction ( p = 0.05).

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Although this interaction did not quite reach statistical significance, this is likely due to small sample sizes.

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