Is occupationally induced exposure to radiation a risk factor for thyroid nodule formation?
- Univ. of Pisa (Italy)
- Inst. of Clinical Medicine II, Pisa (Italy)
The prevalance 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 {le} 20 y, and exposed for {ge} 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. 9 refs., 2 tabs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 451271
- Journal Information:
- Archives of Environmental Health, Vol. 51, Issue 3; Other Information: PBD: May-Jun 1996
- Country of Publication:
- United States
- Language:
- English
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