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0.48マイクロモル/L (10ミクログ/dL) 以下の血中鉛と,米国成人の死亡率
Andy Menke1, Paul Muntner, Vecihi Batuman
1Department of Epidemiology, Tulane University SPHTM, 1430 Tulane Ave, New Orleans, LA 70112, USA.
Circulation
|September 20, 2006
まとめ
血中鉛濃度が低い場合でも,全死因および心血管疾患による死亡のリスクが高くなります. この研究は,心血管疾患による死亡率に関する重要な公衆衛生上の懸念事項として,環境での鉛暴露を強調しています.
科学分野:
- 環境衛生 環境衛生 環境衛生
- 毒理学 毒理学 毒理学
- エピデミオロジー エピデミオロジー
背景:
- 0.48マイクロモール/L以上の血中鉛濃度 (BLLs) は,死亡率の危険因子として知られています.
- 以前の研究は,より高いBLLに焦点を当て,より低いレベルの影響は理解されていない.
研究 の 目的:
- 0.48マイクロモール/L未満のBLLと米国一般人口の死亡率との関連を調査する.
- 低レベルの鉛曝露が健康に重大なリスクをもたらすかどうかを判断する.
主な方法:
- 第3回全国保健栄養調査 (1988-1994) の13,946人の成人の全国代表的なサンプルを分析した.
- 全因および因特定死亡率を追跡するために,最大12年間の追跡.
- 混同因子に対する多変数統計的調整.
主要な成果:
- 高いBLLs (≥0.17マイクロモール/L) と全因死亡率の増加 (HR 1.25,P=0.002) の間に有意な関連性が見られた.
- 心血管疾患による死亡リスクは,より高いBLLs (HR 1.55,P=0.003) で有意に増加し,その関連性は,レベル>0.10マイクロモール/Lで明らかになりました.
- この範囲のBLLと癌による死亡率との間に有意な関連は観察されなかった.
結論:
- この研究では,全因および心血管疾患による死亡率の増加は,以前に認識されていたよりも低いBLLと関連していることが示されています.
- 環境からの鉛曝露は依然として重要な公衆衛生問題であり,心血管疾患による死亡率に大きな影響を与えています.
- 公衆衛生戦略は,死亡リスクを軽減するために,さらに低いレベルの鉛被曝に対処する必要があります.
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