A new study identified overlapping factors that affect your odds of developing these brain diseases late in life.
New research has identified 17 overlapping factors that affect your risk of stroke, dementia and late-life depression, suggesting that a number of lifestyle changes could simultaneously lower the risk of all three.
Though they may appear unrelated, people who have dementia or depression or who experience a stroke also often end up having one or both of the other conditions, said Dr. Sanjula Singh, a principal investigator at the Brain Care Labs at Massachusetts General Hospital and the lead author of the study. Thatâs because they may share underlying damage to small blood vessels in the brain, experts said.
Some of the risk factors common to the three brain diseases, including high blood pressure and diabetes, appear to cause this kind of damage. Research suggests that at least 60 percent of strokes, 40 percent of dementia cases and 35 percent of late-life depression cases could be prevented or slowed by controlling risk factors.
The factors that increase your risk
The study also identified 13 health characteristics and habits that make you more likely to develop dementia, a stroke or late-life depression. (Altogether, the protective and harmful factors add up to 19 factors because two of them, diet and social connections, can increase or decrease risk, depending on their type and quality.)
- High blood pressure
- High body mass index
- High blood sugar
- High total cholesterol
- Depressive symptoms
- A diet high in red meat, sugar-sweetened beverages, sweets and sodium
- Hearing loss
- Kidney disease
- Pain, particularly forms that interfere with activity
- Sleep disturbances (for example, insomnia or poor sleep quality) or sleep periods longer than eight hours
- Smoking history
- Loneliness or isolation
- General stress or stressful life events (as reported by study subjects)
The study only looked at risk factors linked to two or more of the three conditions. It did not prove that these risk factors directly cause the diseases; it only showed an association.
Trying to tackle all of these behaviors for brain health might feel overwhelming. But Dr. Singh suggested treating the list like a menu of options: âChoose just a first risk factor and then take it step by step,â she said.
Read the full article: https://www.nytimes.com/2025/04/23/well/dementia-stroke-depression-prevention.html?unlocked_article_code=1.B08.HdYt.Xhb8Ki947k8-&smid=url-share
Paywalled article:
Modifiable risk factors for stroke, dementia and late-life depression: a systematic review and DALY-weighted risk factors for a composite outcome
https://jnnp.bmj.com/content/early/2025/03/21/jnnp-2024-334925.long