平均値制約下における多項分布の構築とその検出力分析への応用
Lin Fei1,2, Changchun Xie3, Md Monir Hossain1,2
1Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
Journal of biopharmaceutical statistics
|December 22, 2025
まとめ
本研究は、順序カテゴリデータを用いた臨床試験における検出力分析の方法を提供する。治療効果の検定のための多項分布の構築方法と、様々な統計的検定のためのサンプルサイズの計算について詳述する。
科学分野:
- 生物統計学
- 臨床試験デザイン
- 統計モデリング
背景:
- 順序カテゴリアウトカムを有する臨床研究において、検出力分析は極めて重要である。
- 平均スコア変化を多項確率分布に変換することは困難である。
- 既存の方法では、帰無仮説下での多項分布に対する明確な代替法が不足している。
研究 の 目的:
- 平均スコア制約に基づく多項分布を構築するための体系的なスキームを提案する。
- これらの構築を順序カテゴリデータの検出力分析に適用する。
- 異なる統計的検定のサンプルサイズ計算を比較する。
主な方法:
- 平均スコア変化を多項確率分布へのシフトに変換する。
- 制約付き多項分布を構築するための体系的なスキームを開発する。
- カイ二乗検定、リジット検定、スコア検定のサンプルサイズ計算を実行する。
- サンプルサイズの上限と下限を決定するために単目的最適化を利用する。
主要な成果:
- 本研究では、所望の平均スコア変化を反映する多項分布を構築する方法を提示する。提案手法を用いて、カイ二乗検定、リジット検定、スコア検定におけるサンプルサイズ計算を比較する。最適化により、サンプルサイズの上下限を決定する。
結論:
- 提案された構築法は、順序カテゴリデータの検出力分析を容易にする。
- 本手法は、臨床試験におけるサンプルサイズ決定の枠組みを提供する。
- 本研究は、複雑な応答変数を持つ堅牢な臨床試験の設計に役立つ。
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