| Wang Jixian,Li Benxiao,Gao Zhiwei,et al.Risk analysis of malignant tumors among Chinese medical diagnostic X-ray workers in 1950 1990[J].Chinese Journal of Radiological Medicine and Protection,1998,18(2):113-117 |
| Risk analysis of malignant tumors among Chinese medical diagnostic X-ray workers in 1950 1990 |
| Received:March 17, 1997 Revised:April 14, 1997 |
| DOI： |
| KeyWords:Medical X-ray Radiologists Radiation carcinogenesis |
| FundProject:日本体质研究基金会部分资助 |
| Author Name | Affiliation | | Wang Jixian | Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China | | Li Benxiao | Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China | | Gao Zhiwei | Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China | | 徐钧 | Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China | | 张景源 | Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China |
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| Abstract:: |
| Objective To provide evidence and related patterns of formation of human malignant tumors induced by prolonged exposure to low level ionizing radiation.Methods The cancer incidence (1950 1990) among 27011 medical diagnostic X-ray workers was compared with that among 25782 other medical specialists employed between 1950 and 1980 in China by means of O/E system.Results A significantly elevated risk of cancer was seen among diagnostic X-ray workers(RR=1.1,95%CI=1.0- 1.2, P <0.05).Significantly elevated risks were seen for leukemia and cancers of skin,female breast,liver and esophagus,the RR being 2.3.5 .0,1.6.1 .3 and 4.4,respectively.The RR for leukemia was higher for X-ray workers who began employment before 1970 and also for those who were young when employment began.Conclusion The patterns of risk associated with length of service and with age and calendar year of initial employment suggest that the excesses of leukemia,skin cancer and female breast cancer were due to occupational exposure to X-rays. |
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