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インフルエンザワクチン接種と高リスク患者における主要な血管疾患の有害事象
Jennie Johnstone1, Mark Loeb, Koon K Teo
1Department of Medicine, McMaster University, Hamilton, ON, Canada. johnsj48@mcmaster.ca
Circulation
|June 21, 2012
まとめ
インフルエンザワクチン接種は,ワクチンが循環する菌株と一致するときに,高齢者の主要な血管疾患の有害事象を軽減することができます. しかし,潜在的なバイアスは,ランダム化試験のように,明確な結論のためにさらなる研究を必要とします.
科学分野:
- 心臓病学 心臓病学
- 感染症 感染症は感染症です.
- エピデミオロジー エピデミオロジー
背景:
- インフルエンザワクチン接種と主要な血管不良事件 (MAVE) の関連性については,さらなる調査が必要である.
- 以前から血管疾患を患っていた高齢者は,この研究の重要な人口です.
研究 の 目的:
- 既知の血管疾患を有する55歳以上の個体において,インフルエンザワクチン接種とMAVEとの関連性を決定する.
- ワクチンの抗原と流通中のインフルエンザ株の一致によってワクチンの有効性が変化するかどうかを評価する.
主な方法:
- 40カ国の31,546人の参加者を対象とした大規模な観察研究.
- 4つのインフルエンザシーズン (2003年 - 2007年) にわたって収集されたデータで,主なアウトカムとして心血管疾患による死亡,心筋梗塞,脳卒中に焦点を当てています.
- 関連性を評価するために,調整されたオッズ比率 (OR) と信頼区間 (CI) を含む統計分析が用いられ,バイアスをテストするための感度分析が用いられました.
主要な成果:
- インフルエンザワクチン接種は,ワクチンと流通している菌株が一致した3シーズン (2004年~2007年) の間,MAVEのリスクの低下と関連していた.
- ワクチンと流通中のインフルエンザ株の不一致により,2003~2004年の季節に有意な関連は観察されなかった.
- 感受性分析は潜在的なバイアスを示し,インフルエンザとインフルエンザ以外の季節の両方で同様のリスク低下が観察され,混同要因を示唆しました.
結論:
- 予備的な調査結果は,季節が一致する時期にMAVEに対するインフルエンザワクチン接種が保護効果を有することを示唆しているが,潜在的なバイアスは決定的な結論を複雑にする.
- インフルエンザワクチン接種とMAVEとの間の因果関係を明確に確立するために,ランダム化比較試験が推奨されます.
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