Abstract: A total of 4 258 radiation workers who participated in occupational health examination in Nanjing Prevention and Treatment Center for Occupational Diseases in 2021 were selected as the study objects. Relevant data and information were collected, and the results of occupational health examination were analyzed for different occupational groups. The results are showed as follows: (1) There was no statistically significant difference in the detection rate of abnormal routine blood, lens and renal function among different age groups. There were statistically significant differences in the detection rates of thyroid function, blood pressure, electrocardiogram, chest film, blood glucose and liver function abnormalities. (2) There were statistically significant differences in the detection rates of routine blood, blood pressure, chestradiography, electrocardiogram, blood glucose and liver function abnormalities among different radiological working time groups; Compared with the radiological working time group of 1~<5 years, the detection rate of abnormal routine blood in the radiological working time group of 5~<10 years was significantly increased. (3) There were statistically significant differences in the detection rates of abnormal routine blood, thyroid function, blood pressure, chest radiography, blood glucose and liver function among different occupational groups. Among them , the detection rate of abnormal routine blood was the highest in radiotherapy group (10.7%) , the detection rate of abnormal thyroid function and liver function was the highest in nuclear medicine group (12.8% and 23.4%), and the detection rate of abnormal blood pressure, chest film and blood sugar was the highest in logging group. (4) The detection rate of abnormal routine blood and thyroid function of female radiation workers was significantly higher than that of male, and the detection rate of abnormal blood pressure, electrocardiogram, chest film, blood sugar and liver function in male was significantly higher than that of female; The detection rates of abnormal WBC and Hb in females were significantly higher than those in males, and PLT and RBC were not significantly different from those in males. (5) There was no statistically significant difference between the examination results of radiological workers during and after work. It is concluded that the long-term exposure to low dose ionizing radiation may cause body damage , and the health effects of low dose ionizing radiation on related workers need to be cared for. Strengthening protective supervision and regular occupational health examination can help protect the health of radiation workers.

Key words: Ionizing radiation, Radiation workers, Occupational health