血清リン酸濃度と冠動脈疾患患者の心血管疾患発生率との関連
Marcello Tonelli1, Frank Sacks, Marc Pfeffer
1Department of Medicine, University of Alberta, Edmonton, Alberta, Canada. mtonelli@ualberta.ca
Circulation
|October 26, 2005
まとめ
血清リン酸塩濃度の上昇は,正常範囲内であっても,以前に心筋梗塞を患った患者の死亡や心血管疾患のリスクの増加と関連しています. この発見は,フォスファート検査の簡単さと低コストのため,臨床的に有用である可能性があります.
科学分野:
- 心血管医学 心血管医学
- 臨床化学 臨床化学について
- エピデミオロジー エピデミオロジー
背景:
- 血清リン酸塩の値上昇は,心血管疾患の既知の危険因子であり,特に高リン酸血症の危険因子です.
- 心血管疾患のアウトカムに対する正常範囲内の血清リン酸塩濃度の潜在的影響は,まだ十分に理解されていない.
研究 の 目的:
- 発症時の血清リン酸濃度と,前科で心筋梗塞を患った患者の不良臨床結果との関連を調査する.
- 正常範囲内の血清リン酸濃度が心血管疾患や死亡率を予測するかどうかを判断する.
主な方法:
- コレステロールと再発性イベント (CARE) 研究データのポストホック分析.
- 4127人の空腹の参加者を含め,プラバスタチンまたはプラセボにランダムに分けました.
- コックス比例リスクモデルを使用して,血清リン酸とアウトカムとの関係を評価し,混同要因を調整しました.
主要な成果:
- 発症時の血清リン酸濃度の上昇と,全原因による死亡のリスクの増加との間に,有意な関連性が見られた.
- 血清リン酸濃度と死亡率の間の段階的かつ独立した関係が観察されました (P for trend=0.03).
- リン酸塩濃度の上昇は,心不全,心筋梗塞,冠動脈死亡のリスクの増加と関連していましたが,脳卒中とは無関係でした.
結論:
- 血清リン酸塩濃度の上昇は,正常範囲内であっても,以前に心筋梗塞を患った患者の死亡や心血管疾患のリスクの増加と独立して関連しています.
- この研究結果は,血清リン酸の測定が,価値があり,費用対効果の高い臨床ツールである可能性があることを示唆しています.
- 更に研究が進めば,正常範囲のリン酸塩と心血管疾患の悪影響を結びつけるメカニズムが明らかになるかもしれない.
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