公衆衛生
Kumar B Rajan1, Robert S Wilson2, Jerenda Bond1
1Rush Institute for Healthy Aging, Chicago, IL, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
まとめ
黒人と白人の中年層における認知の違いは、高齢者と同様の格差を示しています。これらの発見は、アルツハイマー病における人種間の不平等を示唆しています
科学分野:
- 神経科学
- 公衆衛生
- 老年医学
背景:
- 後期生活における認知機能とアルツハイマー病(AD)のリスクにおける人種間の格差は文書化されています。
- 中年期における黒人と白人の成人間の認知の違いについての理解は限られています。
- 中年期は、AD関連の変化の初期段階における重要な期間であり、この人口集団における認知の老化を研究することが不可欠です。
研究 の 目的:
- 中年成人における全体的な認知機能の人種差を調査すること。
- 黒人と白人の成人における領域固有の認知パフォーマンスの格差を調査すること。
- 中年期の認知の違いを理解することにより、認知の老化と将来の認知症のリスクに関する洞察を提供すること。
主な方法:
- 親と子の回復力と認知健康(PORCH)研究のデータを利用し、シカゴの健康と老化プロジェクト(CHAP)とリンクさせました。
- 記憶、数字配列、カテゴリー流暢性、およびミニメンタルステート検査(MMSE)の評価を使用して、標準化された全体的な認知機能スコアを作成しました。
- 階層回帰モデルを使用して、家族構成と人口統計を調整して、認知機能における人種の違いを分析しました。
主要な成果:
- 598人の中年成人(平均年齢56.7歳、34%が黒人)が含まれていました。
- 黒人参加者は、白人参加者と比較して、有意に低い全体的な認知機能スコアを示しました(Δ = -0.35、p < 0.001)。
- 黒人参加者における記憶(Δ = -0.54)、知覚速度(Δ = -0.30)、およびカテゴリー流暢性(Δ = -0.40)のパフォーマンスの低下が観察されました。
結論:
- 中年期の黒人と白人の成人間の認知格差は、後期に見られるものと並行しています。
- アルツハイマー病および関連認知症(AD / ADRD)のリスクにおける人種の違いは、臨床診断の数十年前に始まる可能性があります。
- 認知の不平等の原因となる体系的な要因を調査し、多様な集団のための早期介入戦略を知らせる必要性を強調しました。
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