[Clinico-epidemiologic observations on the relation of the prevalence of risk factors and the incidence of essential arterial hypertension at a school collective. I].

: In 466 pupils the blood pressure values and the risk factors for essential hypertension were studied. Numerous environmental risk factors were detected, which, depending on each individuals type of reactivity, can be decisive in inducing increase of blood pressure values and the occurrence of arterial hypertension disease at very young ages.