title: [Risk of leukemia among medical X-ray workers in China between 1950 and 1995].
abstract: OBJECTIVE
  To explore the relationship between low dose radiation and leukemia and assess resultant risk of leukemia.
  
  
  METHODS
  The leukemia incidences (1950 - 1995) in 27,011 medical diagnostic X-ray workers and in 25 782 non-radiation workers in hospital employed between 1950 and 1980 in China were compared by O/E system.
  
  
  RESULTS
  The relative risk (RR) of leukemia in the medical X-ray workers was 2.17 (95% CI = 1.58 - 2.91, P < 0.01). The highest RR of leukemia was found in those who engaged in X-ray work before 1960 or at age under 20 years.
  
  
  CONCLUSIONS
  There was a relationship between incidence of leukemia and X-ray radiation in X-ray workers and accumulation of radiation dosage and employment at younger age increased the risk of leukemia.
authors.affiliation: Institute of Radiation Medicine, CAMS and PUMC, Tianjin 300192, China.
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: B
authors.initials: B
authors.lastname: Li
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: J
authors.initials: J
authors.lastname: Zhang
mesh_terms: D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D005260:Female; D006801:Humans; D015994:Incidence; D007953:Leukemia, Radiation-Induced / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D016273:Occupational Exposure / Q000009:adverse effects*; D012189:Retrospective Studies; D018570:Risk Assessment; D014965:X-Rays