Is Occupationally Induced Exposure to Radiation a Risk Factor for Thyroid Nodule Formation?
Antonelli, Alessandro; Silvano, Giovanni; Cambuzza, Carmelo; Bianchi, Fabrizio; Tana, Luigi; Baschieri, Lidio; Antonelli, Alessandro; Institute of Clinical Medicine II; Silvano, Giovanni; Institute of Radiology; Cambuzza, Carmelo; Institute of Clinical Medicine II, University of Pisa; Bianchi, Fabrizio; Unit of Epidemiology and Biostatistics Clinical Physiology Institute; Tana, Luigi; Sanitary Physic Unit; Baschieri, Lidio; Institute of Clinical Medicine II
Журнал:
Archives of Environmental Health: An International Journal
Дата:
1996
Аннотация:
AbstractThe prevalence of thyroid nodules was studied with ultrasonography in a group of male hospital workers (n = 44) who had been exposed occupationally to x-rays. This group was compared with a group of nonexposed workers (n = 88) who were age- and sex-matched with the exposed workers. Thyroid nodules were detected in 18 (41%) of the exposed workers, compared with 11 (13%) of the nonexposed controls. Both groups were subdivided with respect to age (i.e., 30–39 y, 40–49 y, 50–59 y), and there was a higher and significant relative risk for thyroid nodule formation in the exposed group. We also divided the groups into subgroups according to levels of exposure (i.e., nonexposed, exposed for < 20 y, and exposed for > 20 y), and a significant result was obtained with the linear-trend chi-square test. The preliminary results of our study suggest that occupationally induced exposure to radiation may be a risk factor for thyroid nodule formation.
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