ダイエットカルシウム補給による血圧への影響. ランダム化比較試験のメタ分析
H C Bucher1, R J Cook, G H Guyatt
1Department of Clinical Epidemiology and Biostatistics, McMaster University Medical Center, Hamilton, Ontario, Canada.
JAMA
|April 3, 1996
まとめ
カルシウム補給はシストリック血圧をわずかに低下させるかもしれないが,ダイアストリック血圧は低下させない. 特定の集団,特にカルシウム摂取量が不十分である集団における潜在的な影響を調査するために,さらなる研究が必要である.
科学分野:
- 心血管の健康について
- 栄養科学とは,栄養科学である.
- クリニック・トライアル 臨床試験
背景:
- 高血圧は,世界的な主要な健康問題です.
- カルシウム摂取を含む食事要因は,血圧調節における役割について調査されています.
- カルシウム補給と血圧に関する以前の研究は,異なった結果をもたらしました.
研究 の 目的:
- 血圧に対するサプリメントカルシウムの効果を体系的に検討する.
- ランダム化比較試験のデータを分析して,カルシウムの整体的な影響がシストリック血圧とダイアストリック血圧に及ぼす影響を決定する.
主な方法:
- MEDLINEとEMBASEのデータベースで広範な文献検索が行われました.
- カルシウムサプリメントとプラセボを比較した適格なランダム化対照試験 (RCT) が含まれた.
- ランダム効果モデルを用いて,合計2412人の患者を対象とした33件のRCTから得られたデータを分析した.
主要な成果:
- プール分析では,静脈動脈血圧の統計的に有意な低下が-1.27 mm Hg (P=.01) であったことが示された.
- ダイアストリック血圧の有意な低下は観察されなかった (-0.24 mm Hg; P=.49).
- 血圧低下における観察された差異は,特定されたメディエーターが説明しなかった.
結論:
- カルシウムサプリメントは,シストリック血圧のわずかな低下につながる可能性があります.
- ディアストリック血圧への影響は有意ではなかった.
- 亜集団,特にカルシウム摂取量が不足しているサブ集団における潜在的な利益を探るため,さらなる調査が必要である.
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