The evolution of mortality from ill-defined causes among the elderly population in four major Brazilian cities, 1996-2007

Abstract

The objective of this article is to study the evolution of mortality from ill-defined causes in the population over age 60 in the Brazilian cities of Belo Horizonte, Rio de Janeiro, São Paulo and Porto Alegre between 1996 and 2007. The evolution of the proportion of deaths due to ill-defined causes during this period was analyzed, as well as the distribution of these deaths by age group, according to the codes in Chapter XVIII of the International Disease Classification (IDC-10) and the position of this group of causes in the total number of deaths of elderly persons. The chance ratio (95%) for ill-defined causes and their occurrence in hospitals was also evaluated. The evolution of the proportion of deaths from ill-defined causes between 1996 and 2007 in the cities mentioned indicated that the highest proportion of deaths from ill-defined causes in the elderly was in Rio de Janeiro, where such deaths are in 4th place among all causes for this age group. In addition, the percentage of deaths from ill-defined causes that occurred in hospitals in Rio de Janeiro was almost twice as high as that in the other cities. As expected, the classification of cause of death as ill-defined was negatively associated with deaths that occurred in hospitals. The findings show good quality of information but indicate frequent problems in providing medical attention to the elderly population.