A major new review suggests that a fall after the age of 40 could be an early warning sign for dementia. Researchers from Changchun University of Chinese Medicine analyzed data from seven studies involving nearly 3 million participants.
The findings show that a single fall was associated with a 20% higher risk of a future dementia diagnosis. For those who experienced multiple falls, the risk skyrocketed by 74%.
The researchers emphasize this does not prove falls cause dementia. Instead, they propose three possible mechanisms: a fall causing a head injury that accelerates neurodegeneration; a 'common cause' where undiagnosed brain changes cause both the fall and the dementia; or a vicious cycle where fear of falling leads to reduced activity, which is protective against cognitive decline.
The authors conclude that clinicians should monitor for cognitive decline in middle-aged and older adults with a history of recurrent falls, as it may facilitate early detection of dementia.