長期のビタミンEサプリメントが心血管疾患や癌に与える影響:ランダム化制御試験
Eva Lonn1, Jackie Bosch, Salim Yusuf
1Population Health Research Institute, Hamilton Health Sciences and McMaster University, Hamilton, Ontario.
JAMA
|March 17, 2005
まとめ
長期にわたるビタミンEサプリメントは,血管疾患や糖尿病の患者において,がんや心血管疾患を予防しませんでした. この研究では,ビタミンEの使用で心不全のリスクが増加することが判明しました.
科学分野:
- 心血管医学 心血管医学
- 腫瘍学 腫瘍学
- 栄養科学とは,栄養科学である.
背景:
- 以前の研究では,ビタミンEが癌や心血管疾患を予防する可能性があると示唆されていました.
- 臨床試験では,これらの利点が確認されず,持続時間が不十分である可能性があるため,しばしば失敗しています.
研究 の 目的:
- 長期的なビタミンEサプリメントが,がんのリスク,がんによる死亡率,および主要心血管疾患のリスクを低減するかどうかを評価する.
- 既存の血管疾患または糖尿病の患者におけるビタミンEの長期的な効果を評価する.
主な方法:
- ランダム化,ダブルブラインド,プラセボ対照試験 (HOPE-TOO) は,最初のHOPE試験を延長しました.
- 参加者 (n=7030) は,毎日ビタミンE (400 IU) またはプラセボを受け,追跡期間の中央値は7.0年でした.
- 主要アウトカムには,がん発生率/死亡率,主要心血管疾患が含まれ,次要アウトカムには心不全が含まれていました.
主要な成果:
- ガン発症率 (11.6%対12.3%),癌による死亡率 (3.3%対3.7%),または主要な心血管疾患 (21.5%対20.6%) について,ビタミンEとプラセボ群の間で有意な差異は観察されなかった.
- ビタミンEを投与された患者は,心不全のリスクが統計的に有意に高かった (RR, 1.13; P = .03) と,心不全の入院リスクが統計的に有意に高かった (RR, 1.21; P = .045).
- これらの結果は,全体的なHOPE試験集団と,HOPE-TOO拡張に参加したサブセットの両方で一貫していました.
結論:
- 長期のビタミンEサプリメント (毎日400IU) は,血管疾患または糖尿病の個体において,癌または主要な心血管疾患を予防するのに効果的ではありません.
- ビタミンEのサプリメントは,この患者集団において心不全のリスクの増加と関連している可能性があります.
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