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The study was to evaluate factors affecting outcome of 131I therapy in hyperthyroidism for optimizing the method. Data from 213 patients who received 131I treatment from July 2003 to July 2005 in our department were retrospectively analyzed. Factors possibly contributing to the outcome of the 131I therapy were analyzed, including gen-der, age, history of antithyroid drug, thyroid volume, duration of disease and radioactive iodine uptake rate. Multivariate analysis was done. The rates of euthyroidism and hypothyroidism were 69% and 8.5%, respectively, after one time 131I therapy. Multivariate analysis of the patients showed no statistically significant factors affecting the outcome of 131I therapy. The study showed that 131I dose can be directly calculated, and this simplifies the dose-determined method and individualizes the therapy.
The study was to evaluate factors affecting outcome of 131I therapy in hyperthyroidism for optimizing the method. Data from 213 patients who received 131I treatment from July 2003 to July 2005 in our department were retrospectively analyzed. Factors possibly contributing to the outcome of the 131I therapy were analyzed, including gen-der, age, history of antithyroid drug, thyroid volume, duration of disease and radioactive iodine uptake rate. Multivariate analysis was done. The rates of euthyroidism and hypothyroidism were 69% and 8.5%, respectively, after one time 131I therapy. Multivariate analysis of the patients showed no quite significant factors affecting the outcome of 131I therapy. The study showed that 131I dose can be directly calculated, and this simplifies the dose-determined method and individualizes the therapy.