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Haemorheological predictors of cognitive decline: the Edinburgh Artery Study

Creator:

Oxford University Press on behalf of the British Geriatrics Society

Set: Chronic Conditions
Coronary Heart Disease (CHD)
Hypertension
Stroke
Conditions
Type: Report
Region: United Kingdom
Description:

1 Public Health Sciences, Centre for Population Health Sciences, University of Edinburgh, Edinburgh, UK2 Department of Psychology, University of Edinburgh, Edinburgh, UK3 Division of Cardiovascular and Medical Sciences, Medical Faculty, University of Glasgow, Glasgow, UK4 Department of Medicine, Royal Infirmary, Glasgow, UK Introduction: vascular risk factors and diseases can negatively impact cognitive function. Determinants of blood flow are implicated in thrombogenesis and ischaemic events, yet little is known about their relationship with cognition.  Methods: blood rheology data were collected in 1987/88, and cognitive testing was performed in 1998/99 when the mean (±standard deviation) age of the study sample was 73.1 years (±5.0). Follow-up assessment was performed 4 years later. Information was collected on verbal declarative memory, non-verbal reasoning, verbal fluency, information processing speed and a general cognitive factor representing the variance common to the individual test scores. Results: after controlling for age, sex and cognitive performance in 1998/99, blood viscosity (BV) (P < 0.05) and fibrinogen (P < 0.05) predicted decline in non-verbal reasoning over 4 years. When estimated from pre-morbid level, decline in general cognition (P < 0.05), non-verbal reasoning (P < 0.05) and information processing speed (P < 0.01) was associated with BV levels. Haematocrit (HCT) had similar effects (P < 0.01 to P < 0.001). All associations persisted after control for multiple confounders. When examined together, HCT but not BV independently predicted cognitive decline. Conclusions: blood rheology is independently related to cognitive decline in older people. The value of strategies aimed at preserving cognition through influencing blood rheology needs investigation.  Keywords: haemorheology, blood viscosity, haematocrit, cognition, aged, elderly

Date:

26/01/2010

Rights: Public
Suggested citation:

Oxford University Press on behalf of the British Geriatrics Society. (2010) Haemorheological predictors of cognitive decline: the Edinburgh Artery Study [Online]. Available from: http://www.thehealthwell.info/node/9805 [Accessed: 17th July 2018].

  

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