チメロサルを含むワクチンと自閉症との関連
Anders Hviid1, Michael Stellfeld, Jan Wohlfahrt
1Danish Epidemiology Science Centre, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark. aii@ssi.dk
JAMA
|October 2, 2003
まとめ
この研究では,チメロサールを含むワクチンと自閉症との間に関連性がないことが判明しました. ワクチンのエチル水銀に関する研究は,子供における自閉症スペクトラム障害と因果関係がないことを示しています.
科学分野:
- 神経科学は神経科学である.
- 免疫学 免疫学とは
- 小児科は小児科です.
背景:
- ワクチンのエチル水銀を含む防腐剤であるチメロサルは,神経発達障害との潜在的な関連性に関する懸念を提起しています.
- 水銀化合物は,高用量での腎臓毒性および神経毒性作用で知られています.
研究 の 目的:
- チメロサルを含むワクチンの接種と自閉症およびその他の自閉スペクトル障害の発症との関連を調査する.
- ワクチンによるエチル水銀曝露と自閉症スペクトル障害の間に,投与量反応関係があるかどうかを判断する.
主な方法:
- デンマークでは,1990年から1996年の間に生まれた467,450人の子供を含む,人口ベースのコホート研究が行われました.
- チメロサールを含むワクチンを接種した子供たちは,同じワクチンのチメロサールフリー製剤を受けた子供たちと比較されました.
- 自閉症と自閉症スペクトル障害の評価が行われ,エチル水銀の割合比率と用量反応傾向の分析が行われた.
主要な成果:
- ティメロサルを含むワクチンを接種した子供と,ティメロサルを含まないワクチンを接種した子供の間では,自閉症やその他の自閉スペクトル障害のリスクに大きな違いは観察されなかった.
- この研究では,摂取されたエチル水銀の量と,自閉症またはその他の自閉スペクトル障害を発症するリスクとの間での用量反応関連の証拠は見つかりませんでした.
- 自閉症の比率は0.85 (95%CI,0.60-1.20) であり,他の自閉スペクトル障害の比率は1.12 (95%CI,0.88-1.43) であった.
結論:
- この発見は,チメロサールを含むワクチンによる小児ワクチン接種と自閉症スペクトル障害の発症との間の因果関係を裏付けていません.
- この研究は,ワクチンの安全性および神経発達に関する結果の理解に貢献します.
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