Study finds three midlife health factors that could delay dementia for 13 years
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- NYU Langone Health researchers analyzed data from 12,409 people (average age 56) followed for about 26 years and found that having none of three vascular risk factors — high blood pressure, type 2 diabetes, and smoking — was linked to 30.1 years free of dementia on average, versus roughly 17 years for those carrying all three.
- The study, published in Neurology and based on the Atherosclerosis Risk in Communities (ARIC) cohort that began in 1986, reported that 3,008 participants developed dementia during follow-up while 5,238 died without developing it.
- Dr. Josef Coresh, director of NYU Langone's Optimal Aging Institute and senior investigator, argued that people should actively avert these factors in midlife, calling the brain-health payoff 'more than a decade' of additional dementia-free years.
- The research also reported that women lived longer without dementia than men regardless of risk-factor count, and that white participants had more dementia-free years than Black participants.
- Dr. Jacqui Hanley of Alzheimer's Research UK, who was not involved in the study, said the work reframes the question around years lived free of dementia rather than odds of developing it, and urged people to look after both heart and brain health.
- Global dementia cases are forecast to nearly triple to 153 million by 2050, and prior research has estimated that addressing 14 modifiable risk factors across the lifespan could prevent or delay roughly 45% of cases.
Why it matters: The study reframes dementia prevention as years lived cognitively intact rather than a binary diagnosis, giving middle-aged adults a concrete ~13-year payoff for controlling blood pressure, blood sugar, and smoking. With global dementia cases projected to reach 153 million by 2050 and an estimated 45% of cases deemed preventable, this gives clinicians a measurable, midlife-actionable target.
