Low self-confidence and difficulty coping with everyday problems during midlife could be early warning signs of dementia later in life, according to a new study published in The Lancet Psychiatry.
Researchers found that specific depressive symptoms, rather than depression as a whole, are linked to an increased risk of developing dementia up to two decades later. The study highlights the importance of identifying particular emotional and cognitive patterns in middle age that may signal long-term brain health risks.
The research team, led by scientists from University College London (UCL), analysed data from 5,811 participants involved in the UK’s Whitehall II study, a long-running research project examining social inequalities and health outcomes since 1985. Participants were aged between 45 and 69 and dementia-free when depressive symptoms were assessed during 1997–1999.
Over a 25-year follow-up period, around 10.1 per cent of participants developed dementia. Those who reported five or more depressive symptoms had a 27 per cent higher risk of developing the condition.
However, researchers found that the increased dementia risk was driven entirely by six specific symptoms among adults under the age of 60. These included feeling constantly nervous or tense, difficulty concentrating, lack of warmth or affection towards others, difficulty coping with problems, and loss of self-confidence. Notably, loss of confidence and poor coping ability were each associated with a nearly 50 per cent higher risk of dementia.
“Our findings show that dementia risk is linked to a handful of depressive symptoms rather than depression as a whole,” said Philipp Frank, lead author from UCL’s Division of Psychiatry. “Everyday symptoms that many people experience in midlife appear to carry important information about long-term brain health and could open new opportunities for early prevention.”
The researchers suggest that these symptoms may reflect early neurodegenerative changes. They also noted that reduced confidence, poor concentration, and difficulty coping can lead to social withdrawal and fewer mentally stimulating activities, both of which are crucial for maintaining cognitive reserve—the brain’s ability to function despite age-related damage.
The findings align with earlier research indicating that psychological wellbeing may decline years before dementia becomes clinically apparent. Previous studies have shown that a lack of purpose in life and reduced personal growth may also be early indicators of cognitive decline.
The researchers concluded that identifying specific depressive symptoms in midlife could help clinicians better target interventions and support individuals at higher risk of dementia long before symptoms of memory loss emerge.
