Top researchers from Cambridge University have discovered a concerning connection between an individual’s place of residence and the likelihood of developing dementia. Living in a disadvantaged neighborhood has been linked to harm to brain vessels, impacting cognitive abilities. Studies have previously indicated that individuals residing in deprived areas exhibit more significant cognitive decline over time and have a higher risk of dementia, regardless of their own socioeconomic status. Moreover, the location of one’s residence has been associated with variations in brain structure and increased indications of brain tissue damage.
The Cambridge scientists analyzed data from 585 healthy adults aged 40 to 59 in the UK and Ireland. The researchers assessed neighborhood deprivation based on postal codes, evaluated cognitive performance through various tests, and examined modifiable lifestyle risk factors. MRI brain scans were also conducted to identify signs of damage to the brain’s small blood vessels crucial for supplying oxygen and nutrients to brain tissue.
Published in the journal Alzheimer’s & Dementia, the findings revealed a strong correlation between living in a disadvantaged neighborhood and poorer management of lifestyle factors known to elevate the risk of dementia. People in areas with high unemployment, low income, and limited education opportunities were more likely to experience issues such as poor sleep, obesity, high blood pressure, and reduced physical activity. Surprisingly, individuals in deprived neighborhoods tended to consume less alcohol compared to those in wealthier areas.
The research team uncovered a significant link between cognition and neighborhood deprivation, particularly concerning substandard housing, environmental conditions, and higher crime rates. These factors notably impacted a person’s information processing speed, spatial awareness, and attention. The researchers suggested that living in a disadvantaged neighborhood, which is linked to damage to the brain’s small blood vessels, could impair cognitive skills. They emphasized the role of modifiable lifestyle habits in contributing to such damage, indicating that the impact of deprivation on brain function and cognitive performance may be attributed to lifestyle choices and vascular health.
Dr. Audrey Low, the lead author of the study, emphasized the influence of living environment on brain health starting in midlife. She highlighted that challenges in engaging in positive lifestyle behaviors, such as quality sleep and exercise, may be more prevalent in disadvantaged areas, affecting vascular health in the brain and leading to cognitive decline. The researchers emphasized that environmental factors, rather than individual behavior alone, play a crucial role in determining dementia risk.
Professor John O’Brien, the senior author, stressed the impact of living location on brain health and dementia risk, underscoring the importance of addressing health inequalities through support from policymakers at local and national levels. The researchers recommended tailored approaches for different neighborhoods to address specific challenges, such as focusing on alcohol reduction in wealthier areas and promoting healthy lifestyle campaigns in lower-income neighborhoods for dementia prevention.
