Objective: To investigate the nutritional status of iodine and the prevalence of thyroid carcinoma of residents in Zhoushan Archipelago, and to explore the related factors influencing the prevalence of thyroid carcinoma.
Methods: The residents in Zhoushan Archipelago were selected by cluster random sampling. The subjects were surveyed by questionnaire, their thyroids were examined by B-ultrasonography, the thyroid function and the levels of urine iodine were analyzed. Pathological diagnosis was conducted to the patients suspected of thyroid carcinoma.
Results: The median levels of urine iodine in urban residents, famers, salt-makers, fishermen from Zhoushan and buddhists from Putuoshan were 320.7, 188.9, 122.2, 193.6 and 271.7 microg/L respectively, while the prevalence rates of thyroid carcinoma were 215/100 000, 398/100 000 0, 407/100 000, 829/100 000,340/100 000, respectively; The age or a higher level of hTSH of a person were risk factors for suffering from thyroid carcinoma.
Conclusion: The iodine intake of residents in ZhouShan Archipelago is adequate and the prevalence rate of thyroid carcinoma is high. Serum hTSH could be used as a predictor for the risk of thyroid carcinoma.