| WANG Jixian,LI Benxiao,ZHAO Yongcheng,et al.Risk analysis of malignant tumor among medical diagnostic X-ray workers in China,1950-1995[J].Chinese Journal of Radiological Medicine and Protection,2002,22(4):234-238 |
| Risk analysis of malignant tumor among medical diagnostic X-ray workers in China,1950-1995 |
| Received:October 30, 2001 |
| DOI： |
| KeyWords:Medical diagnostic X-ray worker Malignant tumor Radiocarcinogenesis |
| FundProject:日本体质研究会基金资助项目 |
| 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 | | ZHAO Yongcheng | Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin\ 300192, China | | 高智伟 | 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 | | 青山乔 | 日本滋贺医科大学实验放射部 |
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| Abstract:: |
| Objective To provide evidence of human malignant tumors induced by occupational exposure to ionizing radiation and to assess the resultant cancer risk. Methods Cancer incidence (1950-1995) among 27 011 medical X-ray workers was compared by means of O/E system with that of 25 782 other medical specialists employed between 1950 and 1980 in China. Results Significant cancer risk was seen among medical X-ray workers (RR=1.2, 95% CI:1.1-1.3).Significantly elevated risks were found for leukemia and cancer of skin, female breast, lung, liver, bladder and esophangus, the RRs were 2 2, 4 1, 1 3, 1 2, 1 2, 1 8 and 2 7, respectively.The RR of thyroid cancer also elevated but was not significant (RR=1.6, 95% CI:0. 9-2.6).The patterns of risk associated with number of years engaging in X-ray work, age, the calendar year of initial employment, and cumulative dose, suggesting that the excesses of leukemia, skin cancer, female breast cancer, and possibly thyroid cancer, were related to occupational exposure to X-rays. Conclusion These findings suggest that a significant cancer risk can be associated with occupational exposure to ionizing radiation when the cumulative dose reaches a certain level. |
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