[Analysis of thyroid examination results among interventional radiation workers in Tianjin from 2020 to 2022]

Objective: To investigate and analyze the thyroid examination results and influencing factors of interventional radiation workers in Tianjin. Methods: In February 2023, A convenient sampling method was used to select the staff engaged in interventional radiation work in an occupational health inspection institution in Tianjin from 2020 to 2022 as the study object. After excluding the incomplete data, 1080 people were included, and 363 medical staff with non-radiological work during the same period were included as the control group. To analyze the individual doses and occupational health examination data of interventional radiation workers, and to analyze the possible influencing factors of thyroid abnormalities. Results: The cumulative dose M (Q(1), Q(3)) of interventional radiation workers was 1.039 (0.528, 1.905) mSv. The levels of FT(3) and FT(4) in the intervention group were higher than those in the control group, while TSH levels were lower than those in the control group (Z=4.84、6.03、-5.82, P<0.05). The levels of FT(3) and FT(4) in female interventional radiation workers were lower than those in males, while the levels of TSH were higher than those in males (Z= -17.54、-6.65、3.61, P<0.05). There were statistically significant differences in FT(3) levels among different ages, differen tradiation exposure years, different initial age of exposure to radiation, and different cumulative doses (H=47.22、11.33、16.70, Z=-2.48, P<0.05). There were statistically significant differences in thyroid ultrasound abnormalities among different genders, different ages, different initial age of exposure to radiation, and different cumulative doses (χ(2)=28.02、61.12、17.87、11.30, P<0.05). The results of logistic regression analysis showed that the influencing factors of FT(3) distributed in the low-level group were female (OR=10.53, 95%CI: 7.66-14.47, P<0.05), and age 40-49, ≥50 years old (OR=2.40, 95%CI: 1.12-5.14 OR=3.79, 95%CI: 1.59-9.03, P<0.05). The influencing factors of thyroid ultrasound abnormalities were female (OR=1.92, 95%CI: 1.48-2.50, P<0.05) and age ≥50 years old (OR=3.93, 95%CI: 1.91-8.09, P<0.05) . Conclusion: Long term low dose ionizing radiation has a certain effect on FT(3), FT(4) and TSH levels of interventional radiation workers. Gender and increased age are possible influencing factors of the decreased FT(3) levels and thyroid ultrasound abnormalities.