Researchers analyzing decades of data from a large American cohort study have identified three modifiable health factors in middle age that correlate with significantly extended dementia-free life. The investigation, conducted by scientists at NYU Langone Health and published in the journal Neurology, examined information from the Atherosclerosis Risk in Communities study, which has tracked participants since 1986.
The analysis focused on 12,409 participants with an average age of 56 who were initially free of dementia. Researchers assessed three vascular risk factors: high blood pressure, type 2 diabetes, and smoking status. Participants were monitored over approximately three decades, with a mean follow-up period of 26 years. During this timeframe, 3,008 participants developed dementia while 5,238 died without developing the condition.
Results indicated substantial differences in dementia-free lifespan based on risk factor profile. Those with none of the three risk factors experienced almost 13 years longer without dementia compared to those with all three. Specifically, participants with no diabetes, no high blood pressure, and no smoking history averaged 30.1 additional dementia-free years, while those with one risk factor averaged 26.3 years, those with two averaged 21 years, and those with all three had just over 17 years.
The study also documented demographic variations, finding that women maintained longer dementia-free periods than men regardless of risk factor burden, and that white participants had more dementia-free years than black participants. Researchers emphasized that these three factors typically emerge during midlife and produce sustained effects on neurodegenerative disease pathways.
Experts noted that global dementia cases are projected to nearly triple to 153 million by 2050, though approximately half of cases worldwide could potentially be prevented or delayed. The findings underscore the importance of cardiovascular health management beginning at age 45 as a strategy for preserving cognitive function in later life.
Article Attribution | Read More at Article Source
Article summary produced by Claude AI