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Bayesian dose-finding method using Bayesian model averaging

Research Project

Project/Area Number 20K23318
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 1001:Information science, computer engineering, and related fields
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Sato Hiroyuki  東京医科歯科大学, 医学部附属病院, 助教 (70793595)

Project Period (FY) 2020-09-11 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords用量探索デザイン / がん臨床試験 / 分子標的薬 / ベイズ統計学
Outline of Research at the Start

がん分子標的薬は,用量の増加に伴って有効性が単調に増加しない可能性があるため,その非単調な用量-有効性関係を考慮して用量探索を行う必要がある.統計モデルを用いて用量-有効性関係を表現した用量探索法はいくつか提案されているが,開発初期に実施される用量探索試験では適切な統計モデルに関する情報は乏しく,症例数も限られている.本研究では,ベイズ流モデル平均化を応用し,小標本下で統計モデルの選択に関する不確実性を考慮できる新規ベイズ流用量探索法を開発する.

Outline of Final Research Achievements

Model-based dose-finding methods that assume a statistical model for dose-efficacy relationships of molecular-targeted agents in oncology Phase I clinical trial have been challenged by the selection of appropriate statistical models from limited information. To address this issue of model misspecification, we incorporate Bayesian model averaging into the existing model-based dose-finding method and expand it to generate model calibration methods that account for model uncertainty in the dose-efficacy relationship of molecular-targeted agents. We conducted computer simulation studies assuming various dose-efficacy relationships for molecular-targeted agents to compare the performance of the proposed methods with that of existing dose-finding methods. Based on these simulation study results, the proposed dose-finding method showed performance comparable to or better than the existing model-based dose-finding method and was found to be robust against uncertainty in model selection.

Academic Significance and Societal Importance of the Research Achievements

近年,個別化医療を実現するためにがん分子標的薬が活発に開発されているが,最適用量として特定された用量では薬剤の有効性が最大化されない可能性があるという報告がある.本研究では,統計モデルを利用した用量探索法におけるモデル選択の不確実性という課題に着目し,ベイズ統計学を利用した新しい臨床試験デザインを開発し,既存の用量探索法と比較して同等以上の性能を示した.この成果は,本邦のがん分子標的薬の開発に貢献するものであると考える.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (1 results)

All 2022

All Presentation (1 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Presentation] Model calibration approaches for model uncertainty of dose-efficacy relationship in phase I trials for monotherapy of molecularly targeted agents.2022

    • Author(s)
      Sato H, Sasaki M, Hirakawa A
    • Organizer
      2022 WNAR/IMS/JR Annual Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited

URL: 

Published: 2020-09-29   Modified: 2024-01-30  

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