Tendência de mortalidade por câncer de colo de útero e útero porção não especificada no estado de Minas Gerais – 1980 a 2005

Abstract

Introduction: Cervical cancer has had since the fifties, an exam capable of detecting it in its early and curable stage. The availability of the Papanicolaou smear test seems to be the principal reason for the fall in the mortality due to cervical cancer in many countries throughout the world. The aim of this study was to assess the trends of the mortality due to cervical cancer and uterus not otherwise specified (NOS) in the period from 1980-2005, in the state of Minas Gerais. We opted for the model of linear regression and the age-period-cohort approach. Material and Methods: Data related to death and population available at DATASUS were collected. To assess the tendency of mortality by age and period the approach of linear regression was used; the taxes were also log transformed in order to obtain the percentage of change in the mortality by year. The period-cohort analysis was carried out using Tarone & Chu’s non parametric method. Results: A reduction in the mortality due to cervical cancer and uterus not otherwise specified (NOS) for the age and period analyzed was found. The reduction was mainly related with the cases of cancer of uterus not otherwise specified (NOS). In the age-period-cohort analysis the reduction was less than expected for the cohorts from 1901-1908 and 1921-1928. There was a reduction bigger than expected for the cohorts from 1913-1920, 1929-1932, 1937-1946, 19491956, 1963-1970 and 1969-1976. It was also found a bigger reduction than expected for the period from 2000-2001. Conclusion: The reduction in the mortality due to cervical cancer and uterus not otherwise specified (NOS) in the state of Minas Gerais was unmistakable in the period studied. The findings show the influence of the birth cohorts over the decrease in mortality.