Aspectos epidemiológicos da mortalidade por câncer de mama masculina no Brasil, no período de 1996 a 2013

Abstract

Epidemiological studies about the male breast cancer are unusual and scarce, and there are no estimates of the National Cancer Institute (INCA) since consider this event rare. Analysis of mortality serve as indicators of the impact of the disease, as well as serving as morbidity predictors, in addition to serving as predictors of morbidity, and knowing that the existing population-based data do not completely cover the national territory, this study aimed to describe the epidemiological aspects related to mortality from breast cancer in the brazilian male population, analyzing their magnitude. It was conducted analytical study, observational population, mixed ecological type, of the male deaths from breast cancer (C50 ICD 10) occurred in Brazil between 1996 and 2013, from the national databases of the Mortality Information System (SIM). They were calculated means, proportions, crude rates, rates adjusted for age, and verified the projection cases from simple linear regression. During the period there was 1,841 deaths, reflecting a proportional mortality of 0.13% compared to deaths from all cancers among men, and 0.98% of breast cancer deaths in the general population. Most of the observed cases resided outside the capital of the states (54.81%), predominantly between 60 and 69 years of age (63.34 ± 14.63 years) and white individuals (63.06%). The occupations of the group of workers in agriculture and fishing were more frequent in all regions, except in the Southeast. Mortality occurs more precocity in Northern Region. It was observed a superior risk of death in men aged 30 to 39 years (RR=1.36) and between 40 and 49 years (RR=1.27), which reside in the Northeast Region (RR=1.40), with high school (RR=1.21) or graduate (RR=1.32). Work-related, maintenance and repair workers, presented a risk of very high death (RR=3.72). Individuals living in highly vulnerable areas also increases the risk (RR=1.21). Mortality rates grow 2.33% per annum and have a tendency to increase. This variation is 85.71% justified by increased risk. Already the change in the age structure of the population represents only 14.29% of the observed variation. Epidemiological studies are needed to determine the real incidence of the disease in Brazil and studies involving high risk families encompassing genetic testing, in order to create a viable protocol for the screening of potential cases.