title: [Analysis of developing feature of pneumoconiosis].
abstract: OBJECTIVE
  To get the message about the developing feature of pneumoconiosis by analyzing the data from 353 cases of pneumoconiosis diagnosed in our hospital recent 6 years.
  
  
  METHODS
  To analyze the onset age, onset service years and incubation period of 353 cases of pneumoconiosis, especially in silicosis, coal worker's pneumoconiosis and potter's pneumoconiosis.
  
  
  RESULTS
  353 patients referred to 10 species of pneumoconiosis, the silicosis, coal worker's pneumoconiosis and potter's pneumoconiosis were accounted for 28.90%, 43.34% and 15.01% of total pneumoconiosis respectively. Diagnosed patients who began to exposed to dust during 1950's to 1980's accounted for 84.99% of all the diagnosed patients. The onset age, onset service years and incubation period of silicosis, coal worker's pneumoconiosis and potters pneumoconiosis all showed a shorten trend compared each other every decade, especially after 1980's, but excluded potter's pneumoconiosis because of that the ceramics industry switched to other products in Beijing. There was a positive correlation relationship between average onset age and incubation period in three main species of pneumoconiosis mentioned above, but no significant difference could be seen in average promotion years. Additionally, comparing with other type of work, jade machining workers showed such a characteristic as younger onset and short incubation period.
  
  
  CONCLUSIONS
  The development situation of silicosis, coal worker's pneumoconiosis is still no so optimistic, and the strict surveillance and administration especially to the township enterprises with poor production conditions should get further strengthen.
authors.affiliation: Occupational Disease Department, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Xi-Xian
authors.initials: XX
authors.lastname: Xu
authors.forename: Zan-Mei
authors.initials: ZM
authors.lastname: Zhao
mesh_terms: D017668:Age of Onset; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011009:Pneumoconiosis / Q000175:diagnosis* / Q000453:epidemiology*; D013997:Time Factors