Re-survey and follow-up of 1970 Whitehall Study
7000 elderly individuals
In the Whitehall prospective study, smoking, blood cholesterol and blood pressure were recorded in 1968-70.
The aim of CTSU's re-survey, with the University of London, is to examine the predictive value for mortality in old age of blood cholesterol and blood pressure measurements carried out both in middle age and in old age, as well as of other factors (e.g. blood lipid fractions and haemostatic factors; socioeconomic circumstances) measured only in old age. About 8000 survivors were asked to complete a self-administered questionnaire, and to have blood pressure, weight and height measured and a blood sample collected [85]. By taking account of measurements made both in middle age and in old age, with appropriate correction for regression dilution [72], the effects of long-term differences in such exposures on the risk of death can be assessed.
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