【摘要】 目的　研究小剂量电离辐射慢性照射的致白血病作用并评价其危害。方法　用O/E程序分析了我国 2 4个省、直辖市、自治区 195 0～ 1980年在职的 2 70 11名医用诊断X射线工作者和 2 5 782名医院其他科室医务工作者 195 0～ 1995年白血病的发病资料。结果　X射线工作者白血病的发病率明显高于对照 ,相对危险度 (RR)为 2 .17,95 %可信限 (CI) 1.5 8～ 2 .91。白血病的RR以 196 0年前开始从事放射工作和开始从事放射工作时年龄小于 2 0岁者最高 ,且其发病年龄也明显提前。结论　医用诊断X射线工作者患白血病的危险与职业X射线照射有关。当X射线照射剂量累积到一定水平时 ,可导致患白血病的危险明显增高。更多还原

【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. Conclusion 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.更多还原