Analysis of spatial diffusion patterns for AIDS cases in some Brazilian States
Dias, P.R.; Nobre, F.F.
Cadernos de Saude Publica 17(5): 1173-1187
2001
ISSN/ISBN: 0102-311X PMID: 11679892 Document Number: 244662
Despite new improvements in AIDS treatment, preventive measures are still essential to control the epidemic. Effective programmes almost always depend on correct and efficient allocation of scarce health resources. Detailed information on the epidemic, such as where, when, and how the epidemic will spread are of great value. This study was conducted to obtain a better understanding of the dissemination of AIDS cases in four important Brazilian States (Sao Paulo, Rio de Janeiro, Santa Catarina, and Bahia). Spatial diffusion patterns were evaluated qualitatively by studying sequential maps and quantitatively by analysing spatial correlograms. Ten years were analysed, grouped in three periods (1987-1989, 1990-1992, and 1993-1996). The diffusion process was studied for both total AIDS cases and male and female cases. Diffusion of AIDS cases presented specific characteristics for each of the four States. Information derived from the study, especially the results of the correlogram analysis, improve our understanding of the epidemic's spatial diffusion in different parts of the country and can also be used to determine parameters for other AIDS epidemiological models.