Health Care

Study links one concussion with higher rates of dementia and Alzheimer's

Study links one concussion with higher rates of dementia and Alzheimer's

Even decades after an injury, the risk of dementia remains high.

The risk of dementia increased with the number and severity of injuries, and even concussion was linked with a higher risk of dementia.

The authors found that someone with one TBI had a risk of developing dementia after age 50 that was 22 per cent higher than someone with no diagnosed brain injury, this was 33 per cent higher with two TBIs or 200 per cent higher with five or more.

'Over 95% of people who developed dementia in this study hadn't had a brain injury, so the study does not tell us that traumatic brain injury is a definite cause of dementia.

Siria, bombardato aeroporto militare di Homs. Ritorsione dopo attacco chimico?
Secondo l'Osservatorio siriano per i diritti umani, almeno 14 persone sarebbero morte nell'attacco, tra cui combattenti di varie nazionalità.

"Our analysis raises some very important issues, in particular that efforts to prevent traumatic brain injury, especially in younger people, may be inadequate considering the huge and growing burden of dementia and the prevalence of TBI worldwide", said lead author Jesse Fann, Professor of psychiatry and behavioural sciences at the University of Washington School of Medicine. Of the people without dementia, 4.7 percent had suffered a brain injury.

The study, in Lancet Psychiatry, used Danish health databases that included all residents as of January 1, 1995, who were at least 50 years old at some time during the 36-year follow-up, from 1977 to 2013. "Making major decisions about brain injured patients rely on quick assessments and the new method gives us rapid insights into the patient's condition".

The overall risk of dementia in individuals with a history of TBI was 24 percent higher than those without a history of TBI, after accounting for other risk factors for the disease. "Our findings do not suggest that everyone who suffers a traumatic brain injury will go on to develop dementia in later life". Every year, more than 50 million people worldwide experience a TBI, which occurs when an external force disrupts the brain's normal function. In the study, 5.3 percent of dementia patients had a brain injury in the past. And they looked at other types of trauma, such as broken bones, and found that brain injuries were more closely tied to dementia.

Over 36 years, 132,093 individuals had at least one TBI, and most cases were categorised as mild. This also applies to minor injuries such as a concussion. "If they have a history of traumatic brain injury, they should do their best to prevent further traumatic brain injuries".