Development of Vascular Risk Factors over 15 Years in Relation to Cognition: The Hoorn Study
Article first published online: 2 AUG 2012
© 2012, Copyright the Authors Journal compilation © 2012, The American Geriatrics Society
Journal of the American Geriatrics Society
Volume 60, Issue 8, pages 1426–1433, August 2012
How to Cite
J Am Geriatr Soc 2012.
- Issue published online: 13 AUG 2012
- Article first published online: 2 AUG 2012
- Dutch Diabetes Research Foundation
- Utrecht University
- cognitive aging;
- vascular risk factors;
- neuropsychological assessment;
- executive function;
- blood pressure
To investigate the development of vascular risk factor levels at four points over 15 years in relation to late-life cognitive functioning.
Longitudinal population-based study.
The Hoorn Study, a community-based cohort study of glucose metabolism and cardiovascular risk.
Three hundred eighty individuals without dementia (mean baseline age 57.7 ± 5.5).
Four extensive medical examinations were conducted over 15 years. Cognition was assessed in detail at the fourth examination. The time course of vascular risk factors across the examinations was compared between individuals in the highest tertile (good performance) and those in the lowest tertile (poor performance) of cognitive functioning on three cognitive domains (memory, information processing speed, and attention and executive functioning (A&EF)).
Individuals with poor information processing speed had higher levels of systolic blood pressure at baseline (mean difference (standard error) 11.6 (2.6) mmHg, P < .001) than those with good information processing speed. Individuals with poor A&EF had a higher waist:hip ratio (3.03 (1.15), P = .009), glycosylated hemoglobin (0.29% (0.10%), P = .005) and total cholesterol:high-density lipoprotein cholesterol ratio (0.38 (0.19), P = .04) at baseline than individuals with good A&EF, although the differences in vascular risk factor levels between the poor and good cognition group diminished with increasing age.
High blood pressure, adiposity, hypercholesterolemia, and hyperglycemia at midlife are associated with late-life cognitive dysfunction, but for most risk factors, this relationship gradually attenuates with increasing age. These results suggest that timing of vascular treatment strategies to prevent cognitive impairment is critical.