Higher blood pressure associated with higher cognition and functionality among centenarians in Australia

R Richmond, J Law… - American journal of …, 2011 - academic.oup.com
American journal of hypertension, 2011academic.oup.com
Background The objective of this study was to examine blood pressure (BP) and cholesterol
levels among centenarians in Australia, and to compare the relationship between these
biological parameters with cognitive and functional status. Methods We performed BP (n=
142) and cholesterol (n= 67) measurements using the Omron automated
sphygmomanometer (Omron Healthcare, Melbourne, Australia) and the LDX Cholestech
Analyzer (Inverness Medical, San Diego, CA), respectively. A medical history was also …
Background
The objective of this study was to examine blood pressure (BP) and cholesterol levels among centenarians in Australia, and to compare the relationship between these biological parameters with cognitive and functional status.
Methods
We performed BP (n = 142) and cholesterol (n = 67) measurements using the Omron automated sphygmomanometer (Omron Healthcare, Melbourne, Australia) and the LDX Cholestech Analyzer (Inverness Medical, San Diego, CA ), respectively. A medical history was also obtained. Cognitive and functional statuses were assessed using the Mini-Mental State Examination (MMSE) and Katz Index of Independence in Activities of Daily Living (Katz ADL), respectively.
Results
Average age of participants was 101.1 years. Hypertension was demonstrated in 1% according to the WHO criterion (≥140/90 mm H g). However, 38% of centenarians were hypertensive, defined as having a medical diagnosis of hypertension, and/or being on antihypertensive medications, and/or having a BP measurement ≥ 140/90 mm H g. Mean values were: systolic = 130 mm H g (90– 182 mm H g), diastolic = 70 mm H g (44–98 mm H g), and pulse pressure (PP) = 60 mm H g (20–130 mm H g). Hypercholesterolaemia was only detected in 8% of participants. Hypertension was not associated with increased risk of hypercholesterolaemia. Low systolic BP (SBP) and narrower PP was associated with lower MMSE scores. High SBP and wider PP was associated with better functional status.
Conclusions
Centenarians have a very low prevalence of high BP and high cholesterol compared with the general population. There seems to be an inverse relationship between the risk factors for cardiovascular disease vs. the risk factors for dementia in our sample. There appears to be a complex interaction between BP and health in old age.
American Journal of Hypertension advance online publication 16 December 2010doi:10.1038/ajh.2010.236
Oxford University Press