Mortalidade por câncer de boca e faringe em Natal/RN no período de 1981 a 1995

Abstract

This is an epidemiological time tendency study about the mortality of mouth and pharynx câncer on the population of the city of Natal, from 1981 to 1995. Many considerations were taken about the main risk factors for these types of câncer and their epidemiological situation. We intended to analyze comparatively the relation among the tendency of mortality caused by mouth and pharynx câncer and the other neoplasias within the established period. The data were collected from the obituary of the dead citizens of Natal from 1981 to 1995 by means of the Mortality Information System of Rio Grande do Norte, available in CD-ROM, and also from the demographic censi of 1980 and 1991. In order to organize the analisis, the data were divided into consecutive groups of three years (Triennium) and the main variables were sex, age and the anatomical sites attacked by the câncer. The potential years of life lost (PYLL) due to the occurrence of mouth and pharynx câncer were also estimated and recorded. The results showed that in the first trienium (1981-83), the risks of dying in Natal decreased from 756.93 to 630.96 per 100,000 men and from 528.01 to 417.00 per 100,000 women. Nevertheless, considering the mouth and pharynx câncer, these rates assumed and ascending aspect, raising from 2.60 to 6.66 among men and from 1.55 to 2.08 among the women. The proportional mortality rate (%) caused by malignant neoplasias in the last triennium (1993-95) was 12.4% among men and 16.9% among the women, showing a clear ascending tendency throughout the studied period. The most common anatomical sites, in men and women, attacked by the malignant neoplasias of the mouth (not especifíed) and the average of ages was from 65 to 69 years old. There was a significant subtration of 1,167.5 potential years of life from the population of the city of Natal, and 977.5 years were taken from the men and 190.0 from the women.