New Delhi, Jan 1 — Older adults who experience both physical frailty and depression may face a significantly higher risk of developing dementia, according to a new study. Researchers found that the combined effect of these two conditions could account for around 17 per cent of overall dementia risk.
The study, published in General Psychiatry, shows that while frailty and depression individually raise the risk of dementia, having both conditions together increases the likelihood more than threefold compared to older adults in good physical and mental health.
Scientists from the Zhejiang University School of Medicine analysed data from over 200,000 participants in the United States and the United Kingdom, including records from the UK Biobank. Over a 13-year follow-up period, 9,088 individuals were diagnosed with dementia.
The analysis revealed that frail participants were 2.5 times more likely to develop dementia, while those with depression had a nearly 60 per cent higher risk. The highest risk was observed among individuals who had both frailty and depression.
Researchers identified a significant interaction between the two conditions, suggesting that lower levels of frailty may partly offset the cognitive impact of depression, and vice versa. However, once both conditions progress beyond a certain threshold, this compensatory effect appears to break down, leading to a sharp rise in dementia risk.
The findings highlight the complex relationship between physical health, mental health, and cognitive decline. The researchers emphasized the importance of routine screening for frailty and depression in older adults, noting that timely intervention may help reduce the future burden of dementia.
