title: [Risk of leukemia among diagnostic x-ray workers in China between 1950 and 1990].
abstract: OBJECTIVE
  To explore the relationship between radiation and leukemia.
  
  
  METHODS
  Leukemia incidences (1950-1990) in 27011 diagnostic X-ray workers and in 25782 other medical specialists employed between 1950 and 1980 in China were compared.
  
  
  RESULTS
  The relative risk (RR) of leukemia in the diagnostic X-ray workers was 2.25-fold (95% C1=1.59-3.09, P<0.001) higher than that in the control group. The average age of the emergence of leukemia was 10.4 years younger in X-ray workers than in control group. The peak incidence of leukemia in X-ray workers occurred 10-14 years after engaging in X-ray work. The highest RR of leukemia was found in those who were engaged in X-ray work before 1965 or at age under 20 years.
  
  
  CONCLUSIONS
  Incidence of Leukemia in X-ray workers increased and it was correlated with radiation dosage and duration.
authors.affiliation: Institute of Radiation Medicine, CAMS and PUMC, Tianjin 300192.
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: B
authors.initials: B
authors.lastname: Li
authors.forename: Z
authors.initials: Z
authors.lastname: Gao
authors.forename: J
authors.initials: J
authors.lastname: Xu
authors.forename: J
authors.initials: J
authors.lastname: Zhang
mesh_terms: D000328:Adult; D017677:Age Distribution; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D007938:Leukemia / Q000453:epidemiology* / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure / Q000009:adverse effects* / Q000706:statistics & numerical data; D011859:Radiography; D012306:Risk; D013997:Time Factors; D055815:Young Adult