JAMA Neurol: High blood pressure plays an important role in dementia risk in black population

The statistics found that blacks were more at risk of dementia than whites, while blacks had a higher risk of high blood pressure, and researchers recently examined the role of blood pressure (bp) in blacks' high risk of dementiastudy collected data from five cohort study participants, with an average follow-up of 12.4 years from 1971 to 2017The main endpoint of the study was cognitive change, with secondary outcomes being changes in memory and execution19,378 baseline stroke-free and dementia participants, the average age of the first cognitive assessment was 59.8, with 10,724 women (55.3%) and 15,526 (80.1%) whitesCompared to whites, blacks' overall cognitive ability (decrease of 0.03 points per year) and memory loss were significantly faster (0.08 points per year), but slower performance (decrease of 0.09 points per year)Time-dependent cumulative average systolic levels were associated with a significant and rapid decline in overall cognition (0.018 points per year for every 10 mmHg increase in blood pressure), memory (0.028 points per year) and execution capacity (0.01 points per year for every 10 mmHg increase)After adjusting for cumulative average systolic pressure, the difference between blacks and whites in overall cognition (-0.01 points/year) and memory (-0.06 points/year) decreased, but did not change in executive ability (0.10 cents/year)studies suggest that higher blood pressure levels or cognitive decline in black populations in later life is one of the reasons