TBI Is Associated With Increased Dementia Risk for Decades After Injury

This information has been reported for years in the literature. Not only do many people suffer from post concussion symptoms including headache, dizziness/vertigo, continuous nausea, emotional disturbances and cognitive issues, the risk of dementia as reported in this study is significantly increased.

TBI Is Associated With Increased Dementia Risk for Decades After Injury

January 31, 2018

SAN FRANCISCO — January 31, 2018 — Traumatic brain injury (TBI) increases the risk of a dementia diagnosis for more than 30 years after a trauma, though the risk of dementia decreases over time, according to a study published this week in PLOS Medicine.

Although TBI has been associated with dementia, the details of that risk over time and in different TBI types have not been well studied.

For the current study, Anna Nordström, Umeå University, Umeå, Sweden, and colleagues tracked all diagnoses of dementia and TBI in Swedish nationwide databases from 1964 through 2012.

In a retrospective cohort, 164,334 individuals with TBI were matched with control participants who did not have TBI; in a case-control cohort, 136,233 individuals diagnosed with dementia at follow-up were matched with control participants who did not develop dementia; and in a third cohort, the researchers studied 46,970 sibling pairs with one individual having a TBI.

In the first year after TBI, the risk of dementia is increased by 4- to 6-fold. Thereafter, the risk decreased rapidly but was still significant more than 30 years after the TBI.

Overall, the risk of dementia diagnosis was increased by about 80% during a mean follow-up period of 15 years.