Data obtained from
longitudinal surveys of
arterial blood pressure in two general
population samples have been used to examine the relationship between change of
blood pressure, the mean
pressure attained and age. It has been shown, by multiple
regression analysis of change of
pressure on mean
pressure and age, that in these
populations changes in
pressure during 10 year and 81/2 year intervals are highly significantly related to mean
pressures, but only indirectly related to age. This implies that ageing
plays no direct part in determining the rate of change of
pressure; age appears to
play a
role solely because the
blood pressure changes are positive and increase with higher
pressures (AU)