[The problem of hypertension in Switzerland. Analysis of a blood pressure study in 21,589 persons].

Blood pressure measurements (Phyiometrics SR1) were performed on 21 589 persons visiting the Swiss Trade Fair in Basel in 1974. Diastolic pressures were found to be greater than or equal 110 mm Hg in 3%, greater than or equal 100 mm Hg in 7% and greater than or equal 95 mm Hg in 12% of the screened population. Including those under antihypertensive treatment, the prevalence of high blood pressure (diastolic pressure greater than or equal 95 mm Hg) amounted to 19% of the adult population. In 68% of the hypertensive screenees the condition was already known, 49% were under treatment and 35% were controlled (i.e. diastolic pressure less than 95 mm Hg). In other words - and here lies the unsolved problem - 32% of hypertensives are as yet undetected, 19% of the known cases are not treated, and 14% are inadequately treated. Of the hypertensive population 35% are adequately treated and 30% have mild hypertension. The remaining 35%, with diastolic pressure greater than or equal 100 mm Hg, require urgent attention and action. In Switzerland this problem can be tackled and solved by the general practitioner, who already play the major role in detection and treatment.