甲状腺機能と甲状腺機能過剰症の治療を受けた患者の死亡率
Jayne A Franklyn1, Michael C Sheppard, Patrick Maisonneuve
1Division of Medical Sciences, University of Birmingham, England.
JAMA
|July 7, 2005
まとめ
甲状腺機能過剰症に対する放射性ヨウ素治療は,当初死亡率を増加させたが,このリスクはチロキシン (T4) 治療で減少した. 甲状腺機能低下症を誘発する甲状腺機能低下症の治療と,その後のT4置換は,特にサブクリニックの甲状腺機能低下症が発症した場合,推奨されます.
科学分野:
- 内分泌学と代謝について
- 心血管の健康についてです.
- 公衆衛生 疫学 流行病学
背景:
- 甲状腺機能不全は,全因および循環器死亡率の上昇と関連しています.
- この増加した死亡率の可逆性と,軽度の甲状腺機能不全または治療による甲状腺機能低下症の影響は不明である.
研究 の 目的:
- 甲状腺機能過剰症に対する放射性ヨウ素治療と死亡率の関連性を調査する.
- タイロキシン (T4) で治療された軽度の甲状腺機能不全および甲状腺機能低下が死亡率に与える影響を評価する.
主な方法:
- 放射性ヨウ素で甲状腺機能過剰症を治療した40歳以上の2668人の集団ベースのコホート研究 (1984-2002).
- 特定死因による死亡率と,イングランドとウェールズにおける年齢および期間別死亡率の比較.
- 放射性ヨウ素誘発性甲状腺機能低下症および下臨床的な甲状腺機能不全における死亡率に対するT4療法の影響の分析.
主要な成果:
- 放射性ヨウ素を投与したグループでは,全死亡率 (SMR 1.14) が一般集団と比較して高かった.
- T4治療の前にまたはそれなしで死亡リスクの増加が観察されましたが,T4治療中に死亡リスクは観察されていません.
- T4治療は,すべての原因による死亡率 (HR 0.65) と循環性死亡率 (HR 0.65) を著しく減少させた.
結論:
- 甲状腺機能過剰症に対する放射性ヨウ素治療は,死亡率の増加と関連しており,その後のチロキシン (T4) 療法によって軽減されます.
- 十分な放射性ヨウ素の用量と,その後T4置換による,明白な甲状腺機能低下症の誘導は支持されています.
- サブクリニック性甲状腺機能低下症の放射性ヨウ素療法後の治療は,不全性心疾患による死亡率を増加させ,T4置換の検討を正当化する可能性があります.
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