Racial Ethnic Disparities in Cognitive Aging Contribute to Dementia Prevention

Strategic Insights -

Researchers at Stanford University School of Medicine have made significant discoveries regarding the impact of cardiometabolic health on racial ethnic disparities in cognitive aging. A recent study published in Alzheimer's Research & Therapy highlights the critical role cardiometabolic risk factors play in determining cognitive outcomes across different racial ethnic groups. The study's findings suggest that addressing cardiometabolic health disparities through targeted interventions could significantly narrow racial ethnic gaps in cognitive decline, ultimately informing precision public-health strategies for dementia prevention.

Key Takeaways:

  • The study analyzed data from 3,833 participants in the HABS-HD study, with 62.0% of participants being female and a mean age of 65.3 ± 8.6 years.
  • Cardiometabolic risk factors such as diabetes, hypertension, dyslipidemia, obesity, and tobacco use were found to independently predict lower performance across all four cognitive domains: episodic memory, executive function, processing speed, and language.
  • NHB and Hispanic ethnicity, APOE e4 genotype, diabetes, hypertension, and tobacco dependence were all associated with lower cognitive performance in all four cognitive domains.
  • Counterfactual population intervention models estimated that eliminating modifiable risk factors within racial ethnic groups could result in significant cognitive gains, with the largest potential gains coming from addressing diabetes and hypertension.
  • The study's findings suggest that targeting cardiometabolic health disparities through population-level interventions could be an effective strategy for preventing dementia, particularly among NHB and Hispanic populations.

Statistics:

  • 32.2% of NHB participants carried the APOE e4 allele, compared to 27.4% of Hispanic participants and 17.6% of NHW participants.
  • 26.1% of NHB participants had diabetes, compared to 35.0% of Hispanic participants and 13.9% of NHW participants.
  • 79.0% of NHB participants had hypertension, compared to 63.6% of Hispanic participants and 58.2% of NHW participants.
  • 56.8% of NHB participants were obese, compared to 50.3% of Hispanic participants and 38.5% of NHW participants.
  • 12.9% of NHB participants were tobacco dependent, compared to 7.5% of Hispanic participants and 3.9% of NHW participants.
  • The study's results suggest that implementing targeted interventions to address cardiometabolic risk factors could result in significant cognitive gains, with an estimated 10-15% reduction in cognitive decline among NHB and Hispanic participants.

Sources:

  • "Population intervention models of racial ethnic disparities in cognitive outcomes from cardiometabolic risk factors - HABS-HD." Alzheimer's Research & Therapy, vol. 17, no. 1, 2025, pp. 1-13. (Alzheimer's Research & Therapy - http://www.alzres.com)
  • "Studies from Stanford University School of Medicine in the Area of Obesity and Diabetes Published (Population intervention models of racial ethnic disparities in cognitive outcomes from cardiometabolic risk factors - HABS-HD)." Obesity & Diabetes Week, October 20, 2025, p 155.