Risk of dementia may be increased for decades after traumatic brain injury

Researchers from Umeå University (Sweden) have published data indicating that traumatic brain injury (TBI) increases the risk of developing dementia for more than 30 years after the injury, though the risk of dementia decreases over time. TBI has previously been associated with dementia, but details of the relationship over the time are less well documented. Anna Nordström and Peter Nordström (Umeå University) tracked diagnosis of dementia and TBI from Swedish national databases between 1964 and 2012, examining a total of 347,537 individuals. A retrospective cohort of 164,334 individuals with TBI were matched with controls who had not experienced a TBI,...