title: [Studies on incidence of malignant tumor in workers exposed to dust in a mine in 30 years].
abstract: OBJECTIVE
  To investigate incidence of malignant tumor in workers exposed to dust in a mine during the past 30 years.
  
  
  METHODS
  A retrospective cohort study was conducted in 16,711 workers exposed to dust and 7,598 non-exposed workers.
  
  
  RESULTS
  Incidence of lung cancer in exposed workers ranked the first place, whth an SMR of 2.648, as compared with that of non-exposed workers. Incidence of lung cancer in the dust-exposed workers with a longer duration of employment was significantly higher than in those with a shorter one. Incidence of lung cancer in exposed workers with a wetoperation mode was lower than that in those with dry-operation mode.
  
  
  CONCLUSIONS
  Malignant tumor, especially lung cancer, occurred more frequently in the workers exposed to dust, which could be a potential risk factor contributing to carcinogenesis.
authors.affiliation: Institute for Occupational Medicine of Zaozhuang Coal Mining Bureau, Shandong.
authors.forename: X
authors.initials: X
authors.lastname: Qin
authors.forename: C
authors.initials: C
authors.lastname: Huang
authors.forename: S
authors.initials: S
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D000328:Adult; D002681:China / Q000453:epidemiology; D003032:Coal Mining; D015331:Cohort Studies; D004391:Dust; D006801:Humans; D015994:Incidence; D008113:Liver Neoplasms / Q000453:epidemiology / Q000209:etiology; D008175:Lung Neoplasms / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure / Q000009:adverse effects*; D012189:Retrospective Studies; D012307:Risk Factors; D011795:Surveys and Questionnaires
chemical_list: D004391:Dust