Cognitive function was investigated in a random sample of subjects on
the general practitioners' registry of hypertensive patients in an inn
er city area and matched with normotensive controls. The response rate
was 66% giving 90 matched pairs, average age 63 yrs, with 47% men. Th
ere was no difference in educational background or measures of reading
ability between the two groups. Cognitive function tests showed a con
sistent trend of poorer performance in hypertensives, with significant
differences in Verbal Learning (immediate recall and retention). Age
was inversely related to cognitive function, but no additional deterio
ration with increasing age was shown in hypertensives.