title: [Esophageal cancer incidence and survival in the province of Zaragoza (Spain): a population-based study].
abstract: OBJECTIVE
  The objective of the present paper is to study the incidence and survival of esophageal cancer from data of the Population-Based Cancer Registries of Zaragoza.
  
  
  METHODS
  Crude and adjusted incidence rates were calculated according to sex and the Joinpoint log-linear regression was utilized to calculate trends in adjusted incidence rates for the period 1978-2002. The observed survival was calculated by utilizing the Kaplan-Meier method. For relative survival, the automate calculation of the Oncology Institute of Catalonia was utilized.
  
  
  RESULTS
  Joinpoint analysis revealed stability in the incidence rates with Annual Percentage Change of 0.16 (CI 95%: -0.8; 1.1) for men and 0.04 for women (CI 95%: -2.8; 2.8). Observed survival in the period 1978-2002 was 33.2% in the first year and 15.3% in the last year. Relative 1-year survival for males and females was 36.3% (CI 95%: 32.7-40.4) and 23.8% (CI 95%: 20.0-28.4) after 5 years.
  
  
  CONCLUSIONS
  Data suggest that there were no significant changes in the incidence rates of esophageal cancer in the province of Zaragoza and that survival was low.
authors: Departamento de Microbiología, Medicina Preventiva y Salud Pública, Universidad de Zaragoza, España. dysouz@yahoo.com.br
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