How does urbanization affect the cognitive function among older adults: A geospatial analysis in China.

Area of Science:

• Gerontology
• Urban Studies
• Cognitive Science

Background:

• Urbanization significantly impacts societal structures and individual well-being.
• The cognitive health of aging populations is a growing concern globally.
• Limited research exists on the specific effects of urbanization dynamics on older adults' cognitive function.

Purpose of the Study:

• To investigate the relationship between urbanization level and rate and cognitive function in Chinese older adults.
• To identify potential mediating factors that influence this relationship.
• To explore regional and area-type disparities in cognitive function among older adults in China.

Main Methods:

• Utilized geospatial big data, including Chinese Longitudinal Healthy Longevity Survey (CLHLS) and nighttime light (NTL) data.
• Employed statistical analyses to assess linear and non-linear associations between urbanization metrics and cognitive performance.
• Controlled for potential mediating variables like education, physical activity, and social engagement.

Main Results:

• A negative linear association was found between the rate of urbanization and cognitive performance in older adults.
• A "U"-shaped non-linear relationship was identified between urbanization level and cognitive function, with a discernible tipping point.
• Eastern regions and urban areas showed better cognitive function compared to mid-western regions and rural areas.

Conclusions:

• Urbanization rate poses a risk to cognitive function in older adults, while urbanization level exhibits a complex non-linear effect.
• Education, physical activity, social engagement, and community services may buffer negative impacts.
• Interventions should prioritize cognitive health support for older adults in rapidly urbanizing environments, particularly those in vulnerable regions.