This study evaluated the effect of low-dose of ionising radiation on thyroid function of medical occupational group with long-term exposure; furthermore; the relationship between the thyroid hormones and the risk factors were analysed; such as exposure length; department. Ultimately; providing the scientific basis for setting the ionising radiation protection standards. The population who engaged radiodiagnosis and radiotherapy in a tertiary-A hospital were set up as occupational exposure; 724 medical professionals as the research object. The authors figured out the basic information and general condition of the groups by face-to-face questionnaire survey; By means of the thyroid hormone testing; the thyroid hormone levels were analysed with different population; occupational exposure factors. Then; obtained the prevalence of thyroid nodules by the thyroid ultrasound. Besides; the authors used the logistic regression model to analyse the risk factors related to thyroid nodule. Applying Epidata?Excel in data management. All the data was analysed by statistical software package Stata12.0. Descriptive statistics; single factor analysis of variance and other statistical methods were used for data analysis. Test standard: ?=0.05?P<0.05 statistical significant. Results: 1. Based on the work experience; we divided the study population into four groups; such as 1-9; 10-19; 20-29; and>30 years. The difference of the TSH level among the four groups was statistically significant (P<0.05). 2. The multiple logistic regression showed that sex and seniority were the independent risk factors for the abnormal rate of thyroid nodules. The authors concluded that long-term exposure to low-dose ionising radiation could induce the thyroid damage of medical occupational population; which should be broader concerned.
Authors: Tu L, Wang SL, Dong Q, Song HY, Li XT, Tan CP, Dong X. ; Full Source: Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi. 2018 Feb 20;36(2):91-94. doi: 10.3760/cma.j.issn.1001-9391.2018.02.003.