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Trends in eye cancer mortality among children in Brazil, 1980–2002

Authors

  • Karina de Cássia Braga Ribeiro DDS, PhD,

    Corresponding author
    1. Hospital Cancer Registry—Centro de Tratamento e Pesquisa Hospital do Câncer A C Camargo, São Paulo, Brazil
    Current affiliation:
    1. Assistant Professor, Department of Social Medicine, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, Brazil.
    • Centro de Tratamento e Pesquisa Hospital do Câncer A C Camargo, Rua Professor Antônio Prudente, 211, São Paulo—SP, CEP 01509-010 Brazil.
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  • Célia Beatriz Gianotti Antoneli MD, PhD

    1. Department of Pediatrics—Centro de Tratamento e Pesquisa Hospital do Câncer A C Camargo, São Paulo, Brazil
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Abstract

Background

In the last few decades mortality from childhood cancers has shown substantial declines in industrialized countries, with smaller favorable trends in South America.

Objective

This study describes mortality trends in childhood eye cancer in Brazil from 1980 to 2002.

Procedure

Age-specific eye cancer death rates (0–4, 5–9, and 10–14 years) were calculated according to gender. Age-standardized mortality rates for children under 15 years were obtained through the direct method, using the 1960 world population as the standard. Trends in mortality were modeled using linear regression methods, with the age-standardized mortality coefficient (3-year centered moving average) as the dependent variable and the calendar year as the independent variable.

Results

The age-standardized mortality rates among the boys decreased from 0.14/100,000 habitants in 1981 and 1985 to 0.06 in 1994, whereas the observed corresponding decline among girls was from 0.17/100,000 habitants in 1982 and 1983 to 0.07 in 2001. Statistically significant declining trends in eye cancer mortality rates were observed for boys (r2 adjusted = 0.54, P < 0.001) and also for girls (r2 adjusted = 0.53, P < 0.001). When only subsite retina was analyzed a statistically significant decrease in mortality coefficients was also noted for males (r2 adjusted = 0.55, P < 0.001) and females (r2 adjusted = 0.32, P = 0.005).

Conclusions

A consistent decrease in eye cancer mortality rates was noted in Brazil. In the absence of changes in incidence rates, this decline could be attributed to the improvement in treatment protocols and survival. Pediatr Blood Cancer 2007;48:296–305. © 2006 Wiley-Liss, Inc.

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