This paper is a summary of the main findings concerning organic brain syndrome (O.S.S.) in a prevalence study carried out among the elderly population of the city of Rio de Janeiro, Brazil. The project selected three districts of the city - Copacabana, Meier and Santa Cruz - in view of a set of indicators. The study for the validation and reliability of the diagnostic instrument was carried out in the district of Copacabana. Prevelence results for organic brain syndrome were 5.9% in Copacabana, 9.84% in Meier and 29,75% in Santa Cruz. Several hypotheses have been formulated in the attempt to explain such diverse results within a single city. Associations with a variety of socio-economic indicators are presented. Dependence and loss of autonomy in elderly people are closely associated with organic brain syndrome. The results are compared with national and international findings.
Organic mental disorders; Depression; Aged; Questionnaires
