Læknablaðið : fylgirit - 01.06.1982, Blaðsíða 17

5
THE REYKJAVIK STUDY. CHANGES IN CARDIOVASCULAR
RISK-FACTORS IN MIDDLE-AGED MEN SINCE 1967.
II. BLOOD PRESSURE.
N. Siqfússon.
Heart Preventive Clinic,Lágmúli 9,Reykjavik,Iceland.
In this general prospective health survey one
of the main purposes is the assessment of known
cardiovascular risk factors and search for new ones.
Participants were 10.737 men born 1907-'34
living in the Reykjavik area. They were allotted to
4 groups according to certain birthdays,Groups A,B,
C and D. In the first stage of the survey 1967-'68
-the baseline survey- Group B was examined. In sub-
sequent stages (Stage II, 1970-'71, Stage III 1974-
'76 and Stage IV 1979-'81) Group B was re-examined
(study group) and Groups C, A and D were invited
for the first time (control groups). Response was
in Stage I: 75%, II: 73%, III: 70%, IV: 70%.
Casual blood pressure was jineasured twice in
each stage with a 10 days interval by a nurse and
a doctor. A standardized health questionnaire was
used including several questions on hypertension.
Hypertensive participants were referred to their
family physicians.
In the first stage of the survey 16% of
participants were hypertensive (WHO-criteria) on
both measurements. 3/4 of these were previously
undiagnosed. Of the known hypertensives 1/2 were
on treatment and 1/3 of these were normotensive.
Changes in hypertension control during 1967-'81
in the study group and control groups will be pre-
sented.