title: [Analysis of 8 years follow up information of malignant tumor in industrial system of Guangzhou].
abstract: OBJECTIVE
  Guangzhou is one of the advanced industry cities in China. To investigate the mortality of malignant tumor in workers from different industries can identify the high risk people who suffer from malignant tumor and have important significance to identify the relation between occupational factors and malignant tumor. This study was designed to follow up the dead situation of malignant tumor in workers from different industries in Guangzhou, and provide the data for prevention and treatment of tumors.
  
  
  METHODS
  A total of 79,573 workers, who exceed 35 years old, from 399 factories of Guangzhou were included in the prospective study for 8 years. It based on individual health files of 399 factories from 1989 to 1992. The total mortality, mortality of malignant tumor, and the disease classification of malignant tumor were investigated by epidemiology and statistics.
  
  
  RESULTS
  A total of 633,869 people year (393,373 men, 30,195 women) have been trailed. The trailed time was more than 8 years. Of 1577 dead employees, 801 died of malignant tumor (50.7%). Of all the occupational types of work, the mortality of malignant tumor in metallurgical industry is apparently higher than that in other industries. In rubber industry, the relative risk of malignant tumor mortality in old age group is higher than that in middle age group. The top three malignant tumors of death were digestive system, respiratory system and rhinopharynx malignant tumors. While the top three mortalities for single organ malignant tumor were lung cancer, liver cancer, and rhinopharynx cancer.
  
  
  CONCLUSIONS
  At present, malignant tumor is a disease which severely imperil the life of workers in different industries of Guangzhou. It is important to do health check periodically in old age group.
authors.affiliation: Department of Haematology, Guangzhou Twelfth Hospital, Guangzhou 510620, P. R. China. datodog@sina.com
authors.forename: Jia-yu
authors.initials: JY
authors.lastname: Chen
authors.forename: Wei-wei
authors.initials: WW
authors.lastname: Liu
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008113:Liver Neoplasms / Q000209:etiology / Q000401:mortality; D008175:Lung Neoplasms / Q000209:etiology / Q000401:mortality; D008297:Male; D008669:Metallurgy; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000209:etiology / Q000401:mortality; D016273:Occupational Exposure; D016016:Proportional Hazards Models; D011446:Prospective Studies; D012307:Risk Factors; D012408:Rubber; D015996:Survival Rate
chemical_list: D012408:Rubber