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- 저자 : Paulette N. Dominguez (검색결과 1 건)
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Abigail U. Canto,Paulette N. Dominguez,Cecilia A. Jimeno,Jerry M. Obaldo,Ruben V. Ogbac 대한내분비학회 2016 Endocrinology and metabolism Vol.31 No.1
Background: Radioactive iodine as a treatment modality has been shown in several studies to be a safe and effective therapy for Graves disease. However, there is still no uniformity regarding optimal dosing method. The aim of this study is to compare the efficacy of calculated and fixed dosing of radioiodine for the treatment of Graves disease. Methods: A hundred twenty-two patients diagnosed with Graves disease were randomized to receive either fixed or calculated dose of radioiodine. Those randomized to fixed activity received either low fixed activity at 9.9 mCi for thyroid gland size <40 g or high fixed activity at 14.9 mCi for thyroid gland size 40 to 80 g, and those grouped to calculated activity received 160 µCi/g of thyroid tissue adjusted for 24 hours radioiodine uptake. Thyroid function tests (free thyroxine [T4] and thyroid stimulating hor mone [TSH]) were monitored at 10, 16, and 24 weeks after radioactive iodine therapy. The primary outcome, treatment failure was defined as persistently elevated free T4 and low TSH. Results: Of the 122 patients randomized, 56 in the fixed dose group and 56 in the calculated dose group completed the follow up. At the end of 6 months, the percentage of treatment failure was 37.50% in the calculated dose group versus 19.64% in the fixed dose group with a relative risk of 0.53 (95% confidence interval, 0.28 to 0.98) favoring the fixed dose group. Conclusion: Fixed dose radioiodine has a significantly lower incidence of persistent hyperthyroidism at 6 months post-radioac tive therapy.
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