A large-scale statistical study, based on Danish data, indicates that persons who suffer traumatic brain injury (TBI) tend to be 24% more likely to get dementia later on. The greatest risk appears to be for people who receive TBI aged between 20-29 years of age.
Therrien, A (2018). Brain injuries increase dementia risk, study finds. London: BBC Health News, April 11th 2018.
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Fann, JR. Ribe, AR. [and] Pedersen, HS. [et al] (2018). Long-term risk of dementia among people with traumatic brain injury in Denmark: a population-based observational cohort study. April 10th 2018. The Lancet Psychiatry. [Epub ahead of print].
An NHS Choices Behind the Headlines critical appraisal offers a sense of perspective.
“the absolute size of this risk increase is very small”.
Brain injury may increase dementia risk. London: NHS Choices; Behind the Headlines, April 11th 2018.