Epidemiological and demographic considerations. Hypertension in underdeveloped countries.

Data obtained from subjects in the city of São Paulo show that hypertension will be an increasing major public health problem as the adult population grows older. Information from over 5000 subjects indicated that males had a prevalence of hypertension almost 3 times that of females, with this difference being significant up to 44 years of age. Although mild and moderate forms of hypertension increased with age among both males and females, black males were noted to have diastolic blood pressures greater than or equal to 90 mm Hg in almost twice the frequency of their white counterparts. In addition, the demographic tendencies in São Paulo of increasing older age groups over the last 2 decades compare similarly with data from other developed Western countries. Thus, the importance of hypertension in underdeveloped countries must not be underestimated.