Incidence and cumulative risk of oral cancer in São Paulo City: 1969, 1973, 1978 e 1998. São Paulo, 2003 / Incidência e risco acumulado de câncer de boca no município de São Paulo: 1969, 1973, 1978 e 1998

AUTOR(ES)

Ricardo Luiz Lorenzi

DATA DE PUBLICAÇÃO

2003

RESUMO

Introduction. In 1998, oral cancer was the eleventh most frequent site of all malignant neoplasms in São Paulo, in males, comprising 1.6% of the global incidence (except for the cancer of skin). According to the São Paulo Cancer Registry this incidence has not decreased in recent years. Furthermore, this type of cancer is highly frequent in this city in comparison with other Brazilian regions as well as in the world. The incidence of oral cancer according to sex and age regarding selected years was considered to be of interest to Public Health. Objectives. To describe and to compare incidence rates of oral cancer in São Paulo City in 1969, 1973, 1978 and 1998, according to sex, age and site of the tumor; to calculate the probability of the incidence of oral cancer over selected age-intervals, according to sex and localization of tumour. Methods. Population based incidence data was obtained from São Paulo Cancer Registry, allowing calculation of cumulative incidence rates according to sex and topographic site along 5-year intervals. Cumulative risks until ages of 20,30,...,70 years, in percent, were then calculated and presented graphically following Zdeb model, modified by Souza. Confidence intervals were build up for statistical analysis of risks according to sex and site of the tumor, allowing comparisons of their magnitudes. Results and comments. Lip cancer risks have decreased, in both sexes, between 1969 and 1998. Increase of risks was observed in oropharynx and oral cavity, in females. This result could be related to an increasing prevalence of tobacco use in females, in São Paulo, as have been reported by several surveys carried out in this city.

ASSUNTO(S)

risco. risk incidence mouth neoplasms / epidemiology neoplasias bucais / epidemiologia incidência

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