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Generalization of treatment effect using similarity of populations

Research Project

Project/Area Number 19K03627
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12040:Applied mathematics and statistics-related
Research InstitutionNational Hospital Organization Nagoya Medical Center

Principal Investigator

Kada Akiko  独立行政法人国立病院機構(名古屋医療センター臨床研究センター), その他部局等, 室長 (70399608)

Co-Investigator(Kenkyū-buntansha) 橋本 大哉  名古屋市立大学, 医薬学総合研究院(医学), 准教授 (50775715)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords対象集団 / 疾患登録 / 外部対照 / 一般化 / 治療効果の一般化
Outline of Research at the Start

治療法開発を進めるうえで探索的な臨床試験の計画段階では、当該治療法での情報や厳密なコントロールの情報は限られている。効率よく治療法開発を進めるためには疾患登録などの情報を用いることが考えられる。その際、疾患登録などの対象集団と今後の臨床研究の集団がどのくらい類似しているか、違いを規定する変数は何かを特定すること、それら変数を調整したうえで治療効果の評価を行うことが重要になってくる。本研究では、疾患登録が存在する状況において、集団類似性を利用し治療効果を広い集団に一般化する方法を開発する。

Outline of Final Research Achievements

Focusing on small clinical trials, we examined methods that use population similarity to generalize or transport treatment effects to a broader population. Simulations confirmed the performance of inverse probability of sampling weighting, g-formula, calibration weighting, and augmented method with doubly-robust estimator. In situations where the number of subjects in a clinical trial is small, the advantage of the method using a doubly-robust estimator was confirmed. Confidence intervals for the restricted mean survival time for small sample sizes were examined by simulation in situations of a single-arm trial. The performance of methods with four different types of transformations was evaluated.

Academic Significance and Societal Importance of the Research Achievements

稀少疾患など対象者数が少ない状況で介入試験を行う場合がある。そのような場合に疾患登録が利用できる状況であれば、対象集団の違いを特定し、解析方法を工夫することで、より広い集団での解釈につながる可能性がある。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Sirolimus for epileptic seizures associated with focal cortical dysplasia type II.2022

    • Author(s)
      Kato M, Kada A, Shiraishi H, Tohyama J, Nakagawa E, Takahashi Y, Akiyama T, Kakita A, Miyake N, Fujita A, Saito AM, Inoue Y.
    • Journal Title

      Ann Clin Transl Neurol

      Volume: 9 Issue: 2 Pages: 181-192

    • DOI

      10.1002/acn3.51505

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A note on confidence intervals for the restricted mean survival time based on transformations in small sample size2021

    • Author(s)
      Hashimoto Hiroya、Kada Akiko
    • Journal Title

      Pharmaceutical Statistics

      Volume: 21 Issue: 2 Pages: 309-316

    • DOI

      10.1002/pst.2170

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A single-arm open-label clinical trial on the efficacy and safety of sirolimus for epileptic seizures associated with focal cortical dysplasia type II: a study protocol.2020

    • Author(s)
      Kada A, Tohyama J, Shiraishi H, Takahashi Y, Nakagawa E, Akiyama T, Saito MA, Inoue Y, Kato M.
    • Journal Title

      Kurume Med J.

      Volume: -

    • NAID

      130008066539

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Single-arm non-blinded multicenter clinical trial on T-cell-replete haploidentical stem cell transplantation using low-dose antithymocyte globulin for relapsed and refractory pediatric acute leukemia.2020

    • Author(s)
      Akiko Kada, Atsushi Kikuta, Akiko M. Saito, Koji Kato, Akihiro Iguchi, Hiromasa Yabe, Hiroyuki Ishida, Nobuyuki Hyakuna, Yoshiyuki Takahashi, Masayuki Nagasawa, Yoshiko Hashii, Katsutsugu Umeda, Kimikazu Matsumoto, Hiroyuki Fujisaki, Michihiro Yano, Yozo Nakazawa, Hideki Sano.
    • Journal Title

      Kurume Med J.

      Volume: -

    • NAID

      130008101718

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 制限付き平均生存時間に対する変数変換を用いた信頼区間推定2022

    • Author(s)
      橋本大哉、嘉田晃子
    • Organizer
      2022年度 日本計量生物学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 小標本の制限付き平均生存時間の推定に対する打ち切りの影響2022

    • Author(s)
      橋本大哉、嘉田晃子
    • Organizer
      2022年度 統計関連学会連合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Evaluation of treatment effect using propensity score in single-arm clinical trial and external control group2020

    • Author(s)
      Akiko Kada, Hiroya Hashimoto
    • Organizer
      41st annual conference of the International Society for Clinical Biostatistics
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Transformations for estimation of restricted mean survival times in small sample size2020

    • Author(s)
      Hiroya Hashimoto, Akiko Kada
    • Organizer
      41st annual conference of the International Society for Clinical Biostatistics
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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