A single fall after the age of 40 could increase the risk of future dementia by over 20%, according to a new review of studies conducted in China. For those experiencing multiple falls, the risk could rise by up to 74%, researchers from Changchun University of Chinese Medicine report.
The study, published in the Journal of Post-Acute and Long-Term Care Medicine, analysed seven studies involving nearly three million participants aged 40 and older who were free of dementia at the outset. Among nearly 1.25 million middle-aged and older adults with a history of falls, dementia incidence was over 11%, rising to 12.3% for those aged 60 or over.
“Both single falls and multiple falls increased the risk of future all-cause dementia, and multiple falls were a more robust predictor,” the researchers wrote. They noted a dose-response relationship, with more frequent falls linked to higher dementia risk.
The findings suggest falls may serve as an early clinical marker of neurodegenerative decline. Possible mechanisms include fall-related injuries accelerating cognitive decline, or neurodegeneration already underway before diagnosis contributing to falls. Additionally, fear of further falls may lead to reduced physical and social activity, both protective against dementia.
The researchers call for clinicians to monitor middle-aged and older adults with a history of recurrent falls for signs of cognitive decline, enabling early detection of dementia. They hope future studies will clarify the association and support preventive strategies.
