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The serial position effect is a cognitive phenomenon where individuals are more likely to recall the first and last items in a list compared to those in the middle. This effect is divided into the primacy effect and the recency effect. The primacy effect is observed when the initial items in a list are remembered better. This occurs because these items are rehearsed more frequently or receive more elaborative processing, allowing them to be encoded into long-term memory more effectively. For...
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Updated: Feb 15, 2026

Method and Instrumented Fixture for Femoral Fracture Testing in a Sideways Fall-on-the-Hip Position
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マルチガン検出試験のポジティブ予測値メトリック

Paul F Pinsky1, Elyse M LeeVan1, Christos Patriotis1

  • 1Division of Cancer Prevention, National Cancer Institute, NIH, Bethesda, MD, USA.

Journal of medical screening
|February 13, 2026
PubMed
まとめ
この要約は機械生成です。

マルチガン検出 (MCD) テストには,柔軟なポジティブ予測値 (PPV) の定義が必要です. 臨床的文脈は,MCDテストのパフォーマンスを評価するためにどのPPVメトリックが最も有用かを決定します.

キーワード:
がん がん がん がん がん発症したのがんは,発症シグナル源である.マルチガン検出テストポジティブな予測値が与えられます.スクリーニング・スクリーニング

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科学分野:

  • 腫瘍学 腫瘍学
  • 医療診断 医療診断
  • バイオ統計学 バイオ統計学

背景:

  • マルチガン検出 (MCD) テストは,複数の癌の種類をスクリーニングし,しばしば予測された癌信号起源 (CSO) を提供します.
  • 陽性予測値 (PPV) は,単一がんスクリーニングの標準指標ですが,MCDテストでは適応が必要です.

研究 の 目的:

  • MCDテストのためのさまざまなPPVメトリックを定義し,評価する.
  • PPVの性質を評価するためのプロトタイプのMCDテストを作成する.
  • PPVに対する非標的部位の感受性の影響を分析する.

主な方法:

  • PPVALL,PPVT,PPVCSOを含む定義されたPPVメトリクスは,異なる数値/分母集団に基づいています.
  • 症例対照研究データと集団発生率を使用して,MCDテストのパフォーマンスをモデル化しました (感度,特異性,CSOの精度).
  • ターゲットでない癌部位に対する感度範囲をカバーするプロトタイプのMCDテストのためのPPVを計算した.

主要な成果:

  • PPVALLは増加し,PPVTは低下し,非標的がん部位に対する感度が高まった.
  • サイト固有のPPVは,がんサイト流行よりも,CSOの精度に依存していた.
  • PPV定義の選択は,MCDテスト性能の解釈に大きく影響します.

結論:

  • MCDテストには複数のPPV定義が適用され,それぞれが独自の意味合いを持っています.
  • 異なるPPVの臨床的有用性は,特定の臨床シナリオと意図された用途に依存します.
  • MCDテスト開発者と臨床医の間の明確なコミュニケーションは,適切なPPVメトリックの選択と報告に不可欠です.