People with traumatic brain injury are more likely to be diagnosed with dementia even after 30 years

People with a traumatic brain injury are more likely to be diagnosed with dementia even 30 years later, according to a new study that looked at data spanning nearly half a century.

Traumatic brain injury (TBI) has long been associated with dementia, but there have been few long-term studies of this link. In today’s study, published in the journal PLOS Medicine, researchers looked at a dataset of all Swedes that were at least 50 as of December 2005 — totaling about 3.3 million people in all. They checked this against diagnoses of dementia and TBI from national databases that spanned 1964 to 2012. The results show that the risk of developing dementia is increased by four to six times in the first year after a TBI. Overall, the risk...

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