中国人高齢者の心電図異常と心血管リスク予測: 広州バイオバンクコホート研究
Wen Bo Tian1, Wei Sen Zhang2, Chao Qiang Jiang2
1School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, China.
Heart (British Cardiac Society)
|August 27, 2025
まとめ
複数の軽微な心電図異常 (EA) と重度の異常は,高齢者の心血管疾患 (CVD) と死亡リスクを高めます. しかし,心電図の異常スコアは,CVDリスクの予測に限られた改善を提供します.
科学分野:
- 心臓病科
- ゲロントロジー
- 公衆衛生
背景:
- 高齢者における複数の軽微な心電図異常 (EA) と心血管疾患 (CVD) のリスクとの関連に関する証拠は限られている.
- CVDリスクに対する単一のEA重症度と比較して,加重EAスコアの予測価値は十分に確立されていません.
研究 の 目的:
- 中国人の高齢者における心電図異常 (EA) の重度およびEAスコアと心血管疾患 (CVD) の発生および死亡率との関連を調査する.
- CVDリスクに対するEAの重度とスコアのインクリメンタル予測値を評価する.
主な方法:
- 広州バイオバンクコホート研究 (GBCS) の50歳以上の中国人26,846人を対象とした分析.
- ミネソタ・コード・マニュアルを用いて軽症と重症のEAを分類し,EAの重症度 (正常,軽症,1種,軽症2種以上,重症) を定義する.
- コックス回帰を用いたEAスコアの作成,後方段階的な選択; コックス回帰を用いたCVD事件,全因,およびCVD死亡率との関連の検討; C指数および純再分類指数 (NRI) を用いた予測改善の評価.
主要な成果:
- フォローアップの15. 3年間,EAの重度が高い (軽度1つ,軽度2つ以上,重度2つ) は,インシデントCVDのリスクの増加と関連していた (調整HRは1. 12~1. 46).
- EAスコアで有意な用量反応関係が観察され,高いスコアはCVDイベントと死亡率の実質的な増加を示した (例えば,≥60ポイント:HR 3. 16).
- EAスコアを追加すると,CVDリスクの予測が改善されました (3年後のC指数変化0.011,10年後のNRI変化0.016),しかし,改善は限られ,時間の経過とともに減少しました.
結論:
- 主要なEAと複数のマイナーEAは,高齢者のCVDの発生リスクと死亡率の上昇と関連しています.
- EAスコアは投与量と反応の関係を示し,リスク予測の改善を示していますが,CVDリスク予測の改善における全体的な有用性は限られています.
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